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annotate MetroWpf/MetroWpf.Framework/Extensions/Dynamic.cs @ 65:5d0c5cc83a7a

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Click event handler added
author Steven Hollidge <stevenhollidge@hotmail.com>
date Sun, 22 Apr 2012 14:21:33 +0100
parents 060f02cd4591
children
rev   line source
15
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1 //Copyright (C) Microsoft Corporation. All rights reserved.
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2
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3 using System.Collections.Generic;
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4 using System.Linq.Expressions;
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5 using System.Reflection;
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6 using System.Reflection.Emit;
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7 using System.Text;
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8 using System.Threading;
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9
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10 namespace System.Linq.Dynamic
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11 {
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12 public static class DynamicQueryable
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13 {
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14 public static IQueryable<T> Where<T>(this IQueryable<T> source, string predicate, params object[] values)
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15 {
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16 return (IQueryable<T>)Where((IQueryable)source, predicate, values);
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17 }
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18
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19 public static IQueryable Where(this IQueryable source, string predicate, params object[] values)
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20 {
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21 if (source == null) throw new ArgumentNullException("source");
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22 if (predicate == null) throw new ArgumentNullException("predicate");
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23 LambdaExpression lambda = DynamicExpression.ParseLambda(source.ElementType, typeof(bool), predicate, values);
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24 return source.Provider.CreateQuery(
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25 Expression.Call(
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26 typeof(Queryable), "Where",
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27 new Type[] { source.ElementType },
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28 source.Expression, Expression.Quote(lambda)));
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29 }
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30
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31 public static IQueryable Select(this IQueryable source, string selector, params object[] values)
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32 {
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33 if (source == null) throw new ArgumentNullException("source");
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34 if (selector == null) throw new ArgumentNullException("selector");
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35 LambdaExpression lambda = DynamicExpression.ParseLambda(source.ElementType, null, selector, values);
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36 return source.Provider.CreateQuery(
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37 Expression.Call(
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38 typeof(Queryable), "Select",
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39 new Type[] { source.ElementType, lambda.Body.Type },
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40 source.Expression, Expression.Quote(lambda)));
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41 }
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42
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43 public static IQueryable<T> OrderBy<T>(this IQueryable<T> source, string ordering, params object[] values)
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44 {
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45 return (IQueryable<T>)OrderBy((IQueryable)source, ordering, values);
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46 }
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47
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48 public static IQueryable OrderBy(this IQueryable source, string ordering, params object[] values)
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49 {
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50 if (source == null) throw new ArgumentNullException("source");
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51 if (ordering == null) throw new ArgumentNullException("ordering");
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52 ParameterExpression[] parameters = new ParameterExpression[] {
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53 Expression.Parameter(source.ElementType, "") };
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54 ExpressionParser parser = new ExpressionParser(parameters, ordering, values);
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55 IEnumerable<DynamicOrdering> orderings = parser.ParseOrdering();
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56 Expression queryExpr = source.Expression;
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57 string methodAsc = "OrderBy";
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58 string methodDesc = "OrderByDescending";
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59 foreach (DynamicOrdering o in orderings)
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60 {
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61 queryExpr = Expression.Call(
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62 typeof(Queryable), o.Ascending ? methodAsc : methodDesc,
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63 new Type[] { source.ElementType, o.Selector.Type },
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64 queryExpr, Expression.Quote(Expression.Lambda(o.Selector, parameters)));
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65 methodAsc = "ThenBy";
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66 methodDesc = "ThenByDescending";
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67 }
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68 return source.Provider.CreateQuery(queryExpr);
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69 }
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70
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71 public static IQueryable Take(this IQueryable source, int count)
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72 {
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73 if (source == null) throw new ArgumentNullException("source");
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74 return source.Provider.CreateQuery(
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75 Expression.Call(
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76 typeof(Queryable), "Take",
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77 new Type[] { source.ElementType },
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78 source.Expression, Expression.Constant(count)));
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79 }
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80
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81 public static IQueryable Skip(this IQueryable source, int count)
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82 {
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83 if (source == null) throw new ArgumentNullException("source");
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84 return source.Provider.CreateQuery(
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85 Expression.Call(
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86 typeof(Queryable), "Skip",
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87 new Type[] { source.ElementType },
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88 source.Expression, Expression.Constant(count)));
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89 }
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90
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91 public static IQueryable GroupBy(this IQueryable source, string keySelector, string elementSelector, params object[] values)
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92 {
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93 if (source == null) throw new ArgumentNullException("source");
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94 if (keySelector == null) throw new ArgumentNullException("keySelector");
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95 if (elementSelector == null) throw new ArgumentNullException("elementSelector");
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96 LambdaExpression keyLambda = DynamicExpression.ParseLambda(source.ElementType, null, keySelector, values);
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97 LambdaExpression elementLambda = DynamicExpression.ParseLambda(source.ElementType, null, elementSelector, values);
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98 return source.Provider.CreateQuery(
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99 Expression.Call(
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100 typeof(Queryable), "GroupBy",
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101 new Type[] { source.ElementType, keyLambda.Body.Type, elementLambda.Body.Type },
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102 source.Expression, Expression.Quote(keyLambda), Expression.Quote(elementLambda)));
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103 }
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104
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105 public static bool Any(this IQueryable source)
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106 {
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107 if (source == null) throw new ArgumentNullException("source");
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108 return (bool)source.Provider.Execute(
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109 Expression.Call(
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110 typeof(Queryable), "Any",
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111 new Type[] { source.ElementType }, source.Expression));
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112 }
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113
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114 public static int Count(this IQueryable source)
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115 {
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116 if (source == null) throw new ArgumentNullException("source");
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117 return (int)source.Provider.Execute(
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118 Expression.Call(
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119 typeof(Queryable), "Count",
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120 new Type[] { source.ElementType }, source.Expression));
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121 }
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122 }
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123
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124 public abstract class DynamicClass
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125 {
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126 public override string ToString()
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127 {
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128 PropertyInfo[] props = this.GetType().GetProperties(BindingFlags.Instance | BindingFlags.Public);
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129 StringBuilder sb = new StringBuilder();
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130 sb.Append("{");
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131 for (int i = 0; i < props.Length; i++)
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132 {
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133 if (i > 0) sb.Append(", ");
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134 sb.Append(props[i].Name);
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135 sb.Append("=");
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136 sb.Append(props[i].GetValue(this, null));
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137 }
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138 sb.Append("}");
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139 return sb.ToString();
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140 }
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141 }
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142
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143 public class DynamicProperty
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144 {
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145 string name;
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146 Type type;
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147
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148 public DynamicProperty(string name, Type type)
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149 {
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150 if (name == null) throw new ArgumentNullException("name");
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151 if (type == null) throw new ArgumentNullException("type");
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152 this.name = name;
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153 this.type = type;
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154 }
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155
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156 public string Name
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157 {
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158 get { return name; }
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159 }
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160
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161 public Type Type
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162 {
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163 get { return type; }
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164 }
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165 }
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166
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167 public static class DynamicExpression
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168 {
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169 public static Expression Parse(Type resultType, string expression, params object[] values)
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170 {
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171 ExpressionParser parser = new ExpressionParser(null, expression, values);
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172 return parser.Parse(resultType);
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173 }
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174
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175 public static LambdaExpression ParseLambda(Type itType, Type resultType, string expression, params object[] values)
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176 {
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177 return ParseLambda(new ParameterExpression[] { Expression.Parameter(itType, "") }, resultType, expression, values);
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178 }
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179
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180 public static LambdaExpression ParseLambda(ParameterExpression[] parameters, Type resultType, string expression, params object[] values)
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181 {
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182 ExpressionParser parser = new ExpressionParser(parameters, expression, values);
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183 return Expression.Lambda(parser.Parse(resultType), parameters);
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184 }
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185
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186 public static Expression<Func<T, S>> ParseLambda<T, S>(string expression, params object[] values)
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187 {
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188 return (Expression<Func<T, S>>)ParseLambda(typeof(T), typeof(S), expression, values);
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189 }
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190
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191 public static Type CreateClass(params DynamicProperty[] properties)
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192 {
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193 return ClassFactory.Instance.GetDynamicClass(properties);
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194 }
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195
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196 public static Type CreateClass(IEnumerable<DynamicProperty> properties)
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197 {
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198 return ClassFactory.Instance.GetDynamicClass(properties);
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199 }
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200 }
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201
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202 internal class DynamicOrdering
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203 {
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204 public Expression Selector;
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205 public bool Ascending;
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206 }
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207
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208 internal class Signature : IEquatable<Signature>
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209 {
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210 public DynamicProperty[] properties;
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211 public int hashCode;
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212
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213 public Signature(IEnumerable<DynamicProperty> properties)
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214 {
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215 this.properties = properties.ToArray();
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216 hashCode = 0;
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217 foreach (DynamicProperty p in properties)
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218 {
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219 hashCode ^= p.Name.GetHashCode() ^ p.Type.GetHashCode();
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220 }
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221 }
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222
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223 public override int GetHashCode()
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224 {
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225 return hashCode;
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226 }
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227
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228 public override bool Equals(object obj)
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229 {
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230 return obj is Signature ? Equals((Signature)obj) : false;
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231 }
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232
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233 public bool Equals(Signature other)
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234 {
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235 if (properties.Length != other.properties.Length) return false;
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236 for (int i = 0; i < properties.Length; i++)
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237 {
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238 if (properties[i].Name != other.properties[i].Name ||
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239 properties[i].Type != other.properties[i].Type) return false;
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240 }
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241 return true;
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242 }
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243 }
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244
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245 internal class ClassFactory
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246 {
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247 public static readonly ClassFactory Instance = new ClassFactory();
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248
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249 static ClassFactory() { } // Trigger lazy initialization of static fields
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250
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251 ModuleBuilder module;
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252 Dictionary<Signature, Type> classes;
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253 int classCount;
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254 ReaderWriterLock rwLock;
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255
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256 private ClassFactory()
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257 {
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258 AssemblyName name = new AssemblyName("DynamicClasses");
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259 AssemblyBuilder assembly = AppDomain.CurrentDomain.DefineDynamicAssembly(name, AssemblyBuilderAccess.Run);
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260 #if ENABLE_LINQ_PARTIAL_TRUST
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261 new ReflectionPermission(PermissionState.Unrestricted).Assert();
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262 #endif
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263 try
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264 {
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265 module = assembly.DefineDynamicModule("Module");
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266 }
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267 finally
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268 {
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269 #if ENABLE_LINQ_PARTIAL_TRUST
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270 PermissionSet.RevertAssert();
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271 #endif
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272 }
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273 classes = new Dictionary<Signature, Type>();
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274 rwLock = new ReaderWriterLock();
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275 }
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276
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277 public Type GetDynamicClass(IEnumerable<DynamicProperty> properties)
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278 {
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279 rwLock.AcquireReaderLock(Timeout.Infinite);
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280 try
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281 {
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282 Signature signature = new Signature(properties);
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283 Type type;
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284 if (!classes.TryGetValue(signature, out type))
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285 {
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286 type = CreateDynamicClass(signature.properties);
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287 classes.Add(signature, type);
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288 }
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289 return type;
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290 }
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291 finally
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292 {
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293 rwLock.ReleaseReaderLock();
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294 }
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295 }
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296
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297 Type CreateDynamicClass(DynamicProperty[] properties)
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298 {
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299 LockCookie cookie = rwLock.UpgradeToWriterLock(Timeout.Infinite);
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300 try
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301 {
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302 string typeName = "DynamicClass" + (classCount + 1);
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303 #if ENABLE_LINQ_PARTIAL_TRUST
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304 new ReflectionPermission(PermissionState.Unrestricted).Assert();
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305 #endif
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306 try
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307 {
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308 TypeBuilder tb = this.module.DefineType(typeName, TypeAttributes.Class |
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309 TypeAttributes.Public, typeof(DynamicClass));
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310 FieldInfo[] fields = GenerateProperties(tb, properties);
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311 GenerateEquals(tb, fields);
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312 GenerateGetHashCode(tb, fields);
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313 Type result = tb.CreateType();
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314 classCount++;
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315 return result;
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316 }
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317 finally
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318 {
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319 #if ENABLE_LINQ_PARTIAL_TRUST
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320 PermissionSet.RevertAssert();
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321 #endif
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322 }
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323 }
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324 finally
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325 {
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326 rwLock.DowngradeFromWriterLock(ref cookie);
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327 }
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328 }
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329
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330 FieldInfo[] GenerateProperties(TypeBuilder tb, DynamicProperty[] properties)
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331 {
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332 FieldInfo[] fields = new FieldBuilder[properties.Length];
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333 for (int i = 0; i < properties.Length; i++)
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334 {
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335 DynamicProperty dp = properties[i];
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336 FieldBuilder fb = tb.DefineField("_" + dp.Name, dp.Type, FieldAttributes.Private);
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337 PropertyBuilder pb = tb.DefineProperty(dp.Name, PropertyAttributes.HasDefault, dp.Type, null);
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338 MethodBuilder mbGet = tb.DefineMethod("get_" + dp.Name,
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339 MethodAttributes.Public | MethodAttributes.SpecialName | MethodAttributes.HideBySig,
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340 dp.Type, Type.EmptyTypes);
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341 ILGenerator genGet = mbGet.GetILGenerator();
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342 genGet.Emit(OpCodes.Ldarg_0);
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343 genGet.Emit(OpCodes.Ldfld, fb);
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344 genGet.Emit(OpCodes.Ret);
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345 MethodBuilder mbSet = tb.DefineMethod("set_" + dp.Name,
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346 MethodAttributes.Public | MethodAttributes.SpecialName | MethodAttributes.HideBySig,
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347 null, new Type[] { dp.Type });
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348 ILGenerator genSet = mbSet.GetILGenerator();
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349 genSet.Emit(OpCodes.Ldarg_0);
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350 genSet.Emit(OpCodes.Ldarg_1);
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351 genSet.Emit(OpCodes.Stfld, fb);
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352 genSet.Emit(OpCodes.Ret);
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353 pb.SetGetMethod(mbGet);
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354 pb.SetSetMethod(mbSet);
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355 fields[i] = fb;
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356 }
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357 return fields;
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358 }
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359
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360 void GenerateEquals(TypeBuilder tb, FieldInfo[] fields)
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361 {
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362 MethodBuilder mb = tb.DefineMethod("Equals",
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363 MethodAttributes.Public | MethodAttributes.ReuseSlot |
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364 MethodAttributes.Virtual | MethodAttributes.HideBySig,
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365 typeof(bool), new Type[] { typeof(object) });
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366 ILGenerator gen = mb.GetILGenerator();
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367 LocalBuilder other = gen.DeclareLocal(tb);
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368 Label next = gen.DefineLabel();
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369 gen.Emit(OpCodes.Ldarg_1);
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370 gen.Emit(OpCodes.Isinst, tb);
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371 gen.Emit(OpCodes.Stloc, other);
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372 gen.Emit(OpCodes.Ldloc, other);
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373 gen.Emit(OpCodes.Brtrue_S, next);
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374 gen.Emit(OpCodes.Ldc_I4_0);
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375 gen.Emit(OpCodes.Ret);
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376 gen.MarkLabel(next);
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377 foreach (FieldInfo field in fields)
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378 {
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379 Type ft = field.FieldType;
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380 Type ct = typeof(EqualityComparer<>).MakeGenericType(ft);
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381 next = gen.DefineLabel();
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382 gen.EmitCall(OpCodes.Call, ct.GetMethod("get_Default"), null);
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383 gen.Emit(OpCodes.Ldarg_0);
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384 gen.Emit(OpCodes.Ldfld, field);
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385 gen.Emit(OpCodes.Ldloc, other);
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386 gen.Emit(OpCodes.Ldfld, field);
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387 gen.EmitCall(OpCodes.Callvirt, ct.GetMethod("Equals", new Type[] { ft, ft }), null);
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388 gen.Emit(OpCodes.Brtrue_S, next);
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389 gen.Emit(OpCodes.Ldc_I4_0);
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390 gen.Emit(OpCodes.Ret);
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391 gen.MarkLabel(next);
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392 }
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393 gen.Emit(OpCodes.Ldc_I4_1);
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394 gen.Emit(OpCodes.Ret);
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395 }
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396
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397 void GenerateGetHashCode(TypeBuilder tb, FieldInfo[] fields)
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398 {
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399 MethodBuilder mb = tb.DefineMethod("GetHashCode",
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400 MethodAttributes.Public | MethodAttributes.ReuseSlot |
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401 MethodAttributes.Virtual | MethodAttributes.HideBySig,
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402 typeof(int), Type.EmptyTypes);
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403 ILGenerator gen = mb.GetILGenerator();
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404 gen.Emit(OpCodes.Ldc_I4_0);
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405 foreach (FieldInfo field in fields)
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406 {
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407 Type ft = field.FieldType;
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408 Type ct = typeof(EqualityComparer<>).MakeGenericType(ft);
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409 gen.EmitCall(OpCodes.Call, ct.GetMethod("get_Default"), null);
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410 gen.Emit(OpCodes.Ldarg_0);
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411 gen.Emit(OpCodes.Ldfld, field);
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412 gen.EmitCall(OpCodes.Callvirt, ct.GetMethod("GetHashCode", new Type[] { ft }), null);
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413 gen.Emit(OpCodes.Xor);
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414 }
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415 gen.Emit(OpCodes.Ret);
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416 }
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417 }
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418
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419 public sealed class ParseException : Exception
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420 {
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421 int position;
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422
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423 public ParseException(string message, int position)
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424 : base(message)
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425 {
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426 this.position = position;
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427 }
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428
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429 public int Position
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430 {
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431 get { return position; }
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432 }
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433
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434 public override string ToString()
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435 {
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436 return string.Format(Res.ParseExceptionFormat, Message, position);
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437 }
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438 }
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439
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440 internal class ExpressionParser
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441 {
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442 struct Token
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443 {
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444 public TokenId id;
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445 public string text;
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446 public int pos;
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447 }
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448
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449 enum TokenId
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450 {
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451 Unknown,
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452 End,
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453 Identifier,
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454 StringLiteral,
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455 IntegerLiteral,
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456 RealLiteral,
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457 Exclamation,
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458 Percent,
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459 Amphersand,
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460 OpenParen,
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461 CloseParen,
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462 Asterisk,
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463 Plus,
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464 Comma,
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465 Minus,
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466 Dot,
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467 Slash,
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468 Colon,
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469 LessThan,
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470 Equal,
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471 GreaterThan,
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472 Question,
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473 OpenBracket,
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474 CloseBracket,
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475 Bar,
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476 ExclamationEqual,
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477 DoubleAmphersand,
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478 LessThanEqual,
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479 LessGreater,
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480 DoubleEqual,
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481 GreaterThanEqual,
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482 DoubleBar
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483 }
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484
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485 interface ILogicalSignatures
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486 {
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487 void F(bool x, bool y);
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488 void F(bool? x, bool? y);
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489 }
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490
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491 interface IArithmeticSignatures
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492 {
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493 void F(int x, int y);
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494 void F(uint x, uint y);
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495 void F(long x, long y);
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496 void F(ulong x, ulong y);
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497 void F(float x, float y);
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498 void F(double x, double y);
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499 void F(decimal x, decimal y);
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500 void F(int? x, int? y);
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501 void F(uint? x, uint? y);
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502 void F(long? x, long? y);
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503 void F(ulong? x, ulong? y);
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504 void F(float? x, float? y);
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505 void F(double? x, double? y);
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506 void F(decimal? x, decimal? y);
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507 }
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508
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509 interface IRelationalSignatures : IArithmeticSignatures
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510 {
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511 void F(string x, string y);
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512 void F(char x, char y);
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513 void F(DateTime x, DateTime y);
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514 void F(TimeSpan x, TimeSpan y);
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515 void F(char? x, char? y);
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516 void F(DateTime? x, DateTime? y);
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517 void F(TimeSpan? x, TimeSpan? y);
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518 }
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519
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520 interface IEqualitySignatures : IRelationalSignatures
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521 {
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522 void F(bool x, bool y);
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523 void F(bool? x, bool? y);
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524 }
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525
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526 interface IAddSignatures : IArithmeticSignatures
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527 {
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528 void F(DateTime x, TimeSpan y);
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529 void F(TimeSpan x, TimeSpan y);
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530 void F(DateTime? x, TimeSpan? y);
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531 void F(TimeSpan? x, TimeSpan? y);
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532 }
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533
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534 interface ISubtractSignatures : IAddSignatures
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535 {
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536 void F(DateTime x, DateTime y);
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537 void F(DateTime? x, DateTime? y);
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538 }
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539
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540 interface INegationSignatures
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541 {
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542 void F(int x);
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543 void F(long x);
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544 void F(float x);
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545 void F(double x);
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546 void F(decimal x);
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547 void F(int? x);
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548 void F(long? x);
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549 void F(float? x);
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550 void F(double? x);
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551 void F(decimal? x);
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552 }
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553
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554 interface INotSignatures
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555 {
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556 void F(bool x);
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557 void F(bool? x);
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558 }
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559
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560 interface IEnumerableSignatures
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561 {
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562 void Where(bool predicate);
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563 void Any();
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564 void Any(bool predicate);
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565 void All(bool predicate);
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566 void Count();
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567 void Count(bool predicate);
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568 void Min(object selector);
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569 void Max(object selector);
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570 void Sum(int selector);
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571 void Sum(int? selector);
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572 void Sum(long selector);
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573 void Sum(long? selector);
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574 void Sum(float selector);
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575 void Sum(float? selector);
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576 void Sum(double selector);
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577 void Sum(double? selector);
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578 void Sum(decimal selector);
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579 void Sum(decimal? selector);
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580 void Average(int selector);
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581 void Average(int? selector);
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582 void Average(long selector);
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583 void Average(long? selector);
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584 void Average(float selector);
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585 void Average(float? selector);
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586 void Average(double selector);
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587 void Average(double? selector);
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588 void Average(decimal selector);
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589 void Average(decimal? selector);
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590 }
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591
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592 static readonly Type[] predefinedTypes = {
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593 typeof(Object),
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594 typeof(Boolean),
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595 typeof(Char),
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596 typeof(String),
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597 typeof(SByte),
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598 typeof(Byte),
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599 typeof(Int16),
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600 typeof(UInt16),
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601 typeof(Int32),
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602 typeof(UInt32),
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603 typeof(Int64),
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604 typeof(UInt64),
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605 typeof(Single),
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606 typeof(Double),
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607 typeof(Decimal),
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608 typeof(DateTime),
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609 typeof(TimeSpan),
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610 typeof(Guid),
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611 typeof(Math),
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612 typeof(Convert)
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613 };
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614
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615 static readonly Expression trueLiteral = Expression.Constant(true);
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616 static readonly Expression falseLiteral = Expression.Constant(false);
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617 static readonly Expression nullLiteral = Expression.Constant(null);
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618
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619 static readonly string keywordIt = "it";
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620 static readonly string keywordIif = "iif";
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621 static readonly string keywordNew = "new";
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622
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623 static Dictionary<string, object> keywords;
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624
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625 Dictionary<string, object> symbols;
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626 IDictionary<string, object> externals;
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627 Dictionary<Expression, string> literals;
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628 ParameterExpression it;
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629 string text;
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630 int textPos;
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631 int textLen;
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632 char ch;
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633 Token token;
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634
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635 public ExpressionParser(ParameterExpression[] parameters, string expression, object[] values)
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636 {
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637 if (expression == null) throw new ArgumentNullException("expression");
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638 if (keywords == null) keywords = CreateKeywords();
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639 symbols = new Dictionary<string, object>(StringComparer.OrdinalIgnoreCase);
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640 literals = new Dictionary<Expression, string>();
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641 if (parameters != null) ProcessParameters(parameters);
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642 if (values != null) ProcessValues(values);
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643 text = expression;
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644 textLen = text.Length;
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645 SetTextPos(0);
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646 NextToken();
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647 }
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648
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649 void ProcessParameters(ParameterExpression[] parameters)
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650 {
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651 foreach (ParameterExpression pe in parameters)
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652 if (!String.IsNullOrEmpty(pe.Name))
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653 AddSymbol(pe.Name, pe);
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654 if (parameters.Length == 1 && String.IsNullOrEmpty(parameters[0].Name))
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655 it = parameters[0];
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656 }
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657
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658 void ProcessValues(object[] values)
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659 {
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660 for (int i = 0; i < values.Length; i++)
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661 {
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662 object value = values[i];
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663 if (i == values.Length - 1 && value is IDictionary<string, object>)
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664 {
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665 externals = (IDictionary<string, object>)value;
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666 }
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667 else
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668 {
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669 AddSymbol("@" + i.ToString(System.Globalization.CultureInfo.InvariantCulture), value);
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670 }
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671 }
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672 }
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673
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674 void AddSymbol(string name, object value)
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675 {
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676 if (symbols.ContainsKey(name))
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677 throw ParseError(Res.DuplicateIdentifier, name);
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678 symbols.Add(name, value);
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679 }
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680
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681 public Expression Parse(Type resultType)
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682 {
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683 int exprPos = token.pos;
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684 Expression expr = ParseExpression();
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685 if (resultType != null)
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686 if ((expr = PromoteExpression(expr, resultType, true)) == null)
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687 throw ParseError(exprPos, Res.ExpressionTypeMismatch, GetTypeName(resultType));
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688 ValidateToken(TokenId.End, Res.SyntaxError);
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689 return expr;
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690 }
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691
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692 #pragma warning disable 0219
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693 public IEnumerable<DynamicOrdering> ParseOrdering()
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694 {
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695 List<DynamicOrdering> orderings = new List<DynamicOrdering>();
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696 while (true)
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697 {
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698 Expression expr = ParseExpression();
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699 bool ascending = true;
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700 if (TokenIdentifierIs("asc") || TokenIdentifierIs("ascending"))
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parents:
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701 {
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702 NextToken();
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703 }
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704 else if (TokenIdentifierIs("desc") || TokenIdentifierIs("descending"))
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parents:
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705 {
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706 NextToken();
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707 ascending = false;
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708 }
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709 orderings.Add(new DynamicOrdering { Selector = expr, Ascending = ascending });
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710 if (token.id != TokenId.Comma) break;
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parents:
diff changeset
711 NextToken();
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712 }
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diff changeset
713 ValidateToken(TokenId.End, Res.SyntaxError);
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714 return orderings;
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715 }
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parents:
diff changeset
716 #pragma warning restore 0219
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parents:
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717
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parents:
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718 // ?: operator
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parents:
diff changeset
719 Expression ParseExpression()
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parents:
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720 {
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diff changeset
721 int errorPos = token.pos;
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722 Expression expr = ParseLogicalOr();
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723 if (token.id == TokenId.Question)
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parents:
diff changeset
724 {
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diff changeset
725 NextToken();
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diff changeset
726 Expression expr1 = ParseExpression();
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parents:
diff changeset
727 ValidateToken(TokenId.Colon, Res.ColonExpected);
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parents:
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728 NextToken();
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diff changeset
729 Expression expr2 = ParseExpression();
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730 expr = GenerateConditional(expr, expr1, expr2, errorPos);
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731 }
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732 return expr;
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733 }
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734
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parents:
diff changeset
735 // ||, or operator
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parents:
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736 Expression ParseLogicalOr()
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parents:
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737 {
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diff changeset
738 Expression left = ParseLogicalAnd();
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parents:
diff changeset
739 while (token.id == TokenId.DoubleBar || TokenIdentifierIs("or"))
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parents:
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740 {
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parents:
diff changeset
741 Token op = token;
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parents:
diff changeset
742 NextToken();
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diff changeset
743 Expression right = ParseLogicalAnd();
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744 CheckAndPromoteOperands(typeof(ILogicalSignatures), op.text, ref left, ref right, op.pos);
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diff changeset
745 left = Expression.OrElse(left, right);
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746 }
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parents:
diff changeset
747 return left;
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parents:
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748 }
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parents:
diff changeset
749
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parents:
diff changeset
750 // &&, and operator
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parents:
diff changeset
751 Expression ParseLogicalAnd()
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parents:
diff changeset
752 {
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parents:
diff changeset
753 Expression left = ParseComparison();
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parents:
diff changeset
754 while (token.id == TokenId.DoubleAmphersand || TokenIdentifierIs("and"))
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parents:
diff changeset
755 {
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parents:
diff changeset
756 Token op = token;
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parents:
diff changeset
757 NextToken();
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diff changeset
758 Expression right = ParseComparison();
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parents:
diff changeset
759 CheckAndPromoteOperands(typeof(ILogicalSignatures), op.text, ref left, ref right, op.pos);
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diff changeset
760 left = Expression.AndAlso(left, right);
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761 }
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parents:
diff changeset
762 return left;
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parents:
diff changeset
763 }
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parents:
diff changeset
764
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parents:
diff changeset
765 // =, ==, !=, <>, >, >=, <, <= operators
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parents:
diff changeset
766 Expression ParseComparison()
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parents:
diff changeset
767 {
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parents:
diff changeset
768 Expression left = ParseAdditive();
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parents:
diff changeset
769 while (token.id == TokenId.Equal || token.id == TokenId.DoubleEqual ||
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parents:
diff changeset
770 token.id == TokenId.ExclamationEqual || token.id == TokenId.LessGreater ||
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parents:
diff changeset
771 token.id == TokenId.GreaterThan || token.id == TokenId.GreaterThanEqual ||
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parents:
diff changeset
772 token.id == TokenId.LessThan || token.id == TokenId.LessThanEqual)
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parents:
diff changeset
773 {
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parents:
diff changeset
774 Token op = token;
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parents:
diff changeset
775 NextToken();
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parents:
diff changeset
776 Expression right = ParseAdditive();
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parents:
diff changeset
777 bool isEquality = op.id == TokenId.Equal || op.id == TokenId.DoubleEqual ||
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parents:
diff changeset
778 op.id == TokenId.ExclamationEqual || op.id == TokenId.LessGreater;
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parents:
diff changeset
779 if (isEquality && !left.Type.IsValueType && !right.Type.IsValueType)
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parents:
diff changeset
780 {
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parents:
diff changeset
781 if (left.Type != right.Type)
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parents:
diff changeset
782 {
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parents:
diff changeset
783 if (left.Type.IsAssignableFrom(right.Type))
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parents:
diff changeset
784 {
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parents:
diff changeset
785 right = Expression.Convert(right, left.Type);
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parents:
diff changeset
786 }
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parents:
diff changeset
787 else if (right.Type.IsAssignableFrom(left.Type))
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parents:
diff changeset
788 {
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parents:
diff changeset
789 left = Expression.Convert(left, right.Type);
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parents:
diff changeset
790 }
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parents:
diff changeset
791 else
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parents:
diff changeset
792 {
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parents:
diff changeset
793 throw IncompatibleOperandsError(op.text, left, right, op.pos);
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parents:
diff changeset
794 }
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parents:
diff changeset
795 }
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parents:
diff changeset
796 }
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parents:
diff changeset
797 else if (IsEnumType(left.Type) || IsEnumType(right.Type))
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parents:
diff changeset
798 {
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parents:
diff changeset
799 if (left.Type != right.Type)
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parents:
diff changeset
800 {
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parents:
diff changeset
801 Expression e;
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parents:
diff changeset
802 if ((e = PromoteExpression(right, left.Type, true)) != null)
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parents:
diff changeset
803 {
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parents:
diff changeset
804 right = e;
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parents:
diff changeset
805 }
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parents:
diff changeset
806 else if ((e = PromoteExpression(left, right.Type, true)) != null)
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parents:
diff changeset
807 {
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parents:
diff changeset
808 left = e;
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parents:
diff changeset
809 }
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parents:
diff changeset
810 else
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parents:
diff changeset
811 {
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parents:
diff changeset
812 throw IncompatibleOperandsError(op.text, left, right, op.pos);
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parents:
diff changeset
813 }
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parents:
diff changeset
814 }
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parents:
diff changeset
815 }
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parents:
diff changeset
816 else
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parents:
diff changeset
817 {
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parents:
diff changeset
818 CheckAndPromoteOperands(isEquality ? typeof(IEqualitySignatures) : typeof(IRelationalSignatures),
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parents:
diff changeset
819 op.text, ref left, ref right, op.pos);
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parents:
diff changeset
820 }
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parents:
diff changeset
821 switch (op.id)
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parents:
diff changeset
822 {
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parents:
diff changeset
823 case TokenId.Equal:
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parents:
diff changeset
824 case TokenId.DoubleEqual:
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parents:
diff changeset
825 left = GenerateEqual(left, right);
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parents:
diff changeset
826 break;
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parents:
diff changeset
827 case TokenId.ExclamationEqual:
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parents:
diff changeset
828 case TokenId.LessGreater:
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parents:
diff changeset
829 left = GenerateNotEqual(left, right);
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parents:
diff changeset
830 break;
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parents:
diff changeset
831 case TokenId.GreaterThan:
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parents:
diff changeset
832 left = GenerateGreaterThan(left, right);
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parents:
diff changeset
833 break;
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parents:
diff changeset
834 case TokenId.GreaterThanEqual:
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parents:
diff changeset
835 left = GenerateGreaterThanEqual(left, right);
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parents:
diff changeset
836 break;
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parents:
diff changeset
837 case TokenId.LessThan:
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parents:
diff changeset
838 left = GenerateLessThan(left, right);
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parents:
diff changeset
839 break;
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parents:
diff changeset
840 case TokenId.LessThanEqual:
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parents:
diff changeset
841 left = GenerateLessThanEqual(left, right);
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parents:
diff changeset
842 break;
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parents:
diff changeset
843 }
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parents:
diff changeset
844 }
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parents:
diff changeset
845 return left;
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parents:
diff changeset
846 }
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parents:
diff changeset
847
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parents:
diff changeset
848 // +, -, & operators
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parents:
diff changeset
849 Expression ParseAdditive()
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parents:
diff changeset
850 {
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parents:
diff changeset
851 Expression left = ParseMultiplicative();
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parents:
diff changeset
852 while (token.id == TokenId.Plus || token.id == TokenId.Minus ||
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parents:
diff changeset
853 token.id == TokenId.Amphersand)
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parents:
diff changeset
854 {
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parents:
diff changeset
855 Token op = token;
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parents:
diff changeset
856 NextToken();
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parents:
diff changeset
857 Expression right = ParseMultiplicative();
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parents:
diff changeset
858 switch (op.id)
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parents:
diff changeset
859 {
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parents:
diff changeset
860 case TokenId.Plus:
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parents:
diff changeset
861 if (left.Type == typeof(string) || right.Type == typeof(string))
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parents:
diff changeset
862 goto case TokenId.Amphersand;
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parents:
diff changeset
863 CheckAndPromoteOperands(typeof(IAddSignatures), op.text, ref left, ref right, op.pos);
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parents:
diff changeset
864 left = GenerateAdd(left, right);
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parents:
diff changeset
865 break;
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parents:
diff changeset
866 case TokenId.Minus:
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parents:
diff changeset
867 CheckAndPromoteOperands(typeof(ISubtractSignatures), op.text, ref left, ref right, op.pos);
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parents:
diff changeset
868 left = GenerateSubtract(left, right);
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parents:
diff changeset
869 break;
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parents:
diff changeset
870 case TokenId.Amphersand:
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parents:
diff changeset
871 left = GenerateStringConcat(left, right);
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parents:
diff changeset
872 break;
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parents:
diff changeset
873 }
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parents:
diff changeset
874 }
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parents:
diff changeset
875 return left;
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parents:
diff changeset
876 }
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parents:
diff changeset
877
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parents:
diff changeset
878 // *, /, %, mod operators
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parents:
diff changeset
879 Expression ParseMultiplicative()
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parents:
diff changeset
880 {
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parents:
diff changeset
881 Expression left = ParseUnary();
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parents:
diff changeset
882 while (token.id == TokenId.Asterisk || token.id == TokenId.Slash ||
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parents:
diff changeset
883 token.id == TokenId.Percent || TokenIdentifierIs("mod"))
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parents:
diff changeset
884 {
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parents:
diff changeset
885 Token op = token;
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parents:
diff changeset
886 NextToken();
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parents:
diff changeset
887 Expression right = ParseUnary();
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parents:
diff changeset
888 CheckAndPromoteOperands(typeof(IArithmeticSignatures), op.text, ref left, ref right, op.pos);
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parents:
diff changeset
889 switch (op.id)
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parents:
diff changeset
890 {
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parents:
diff changeset
891 case TokenId.Asterisk:
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parents:
diff changeset
892 left = Expression.Multiply(left, right);
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parents:
diff changeset
893 break;
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parents:
diff changeset
894 case TokenId.Slash:
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parents:
diff changeset
895 left = Expression.Divide(left, right);
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parents:
diff changeset
896 break;
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parents:
diff changeset
897 case TokenId.Percent:
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parents:
diff changeset
898 case TokenId.Identifier:
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parents:
diff changeset
899 left = Expression.Modulo(left, right);
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parents:
diff changeset
900 break;
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parents:
diff changeset
901 }
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parents:
diff changeset
902 }
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parents:
diff changeset
903 return left;
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parents:
diff changeset
904 }
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parents:
diff changeset
905
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parents:
diff changeset
906 // -, !, not unary operators
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parents:
diff changeset
907 Expression ParseUnary()
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parents:
diff changeset
908 {
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parents:
diff changeset
909 if (token.id == TokenId.Minus || token.id == TokenId.Exclamation ||
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parents:
diff changeset
910 TokenIdentifierIs("not"))
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parents:
diff changeset
911 {
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parents:
diff changeset
912 Token op = token;
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parents:
diff changeset
913 NextToken();
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parents:
diff changeset
914 if (op.id == TokenId.Minus && (token.id == TokenId.IntegerLiteral ||
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parents:
diff changeset
915 token.id == TokenId.RealLiteral))
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parents:
diff changeset
916 {
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parents:
diff changeset
917 token.text = "-" + token.text;
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parents:
diff changeset
918 token.pos = op.pos;
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parents:
diff changeset
919 return ParsePrimary();
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parents:
diff changeset
920 }
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parents:
diff changeset
921 Expression expr = ParseUnary();
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parents:
diff changeset
922 if (op.id == TokenId.Minus)
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parents:
diff changeset
923 {
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parents:
diff changeset
924 CheckAndPromoteOperand(typeof(INegationSignatures), op.text, ref expr, op.pos);
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parents:
diff changeset
925 expr = Expression.Negate(expr);
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parents:
diff changeset
926 }
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parents:
diff changeset
927 else
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parents:
diff changeset
928 {
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parents:
diff changeset
929 CheckAndPromoteOperand(typeof(INotSignatures), op.text, ref expr, op.pos);
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parents:
diff changeset
930 expr = Expression.Not(expr);
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parents:
diff changeset
931 }
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parents:
diff changeset
932 return expr;
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parents:
diff changeset
933 }
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parents:
diff changeset
934 return ParsePrimary();
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parents:
diff changeset
935 }
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parents:
diff changeset
936
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parents:
diff changeset
937 Expression ParsePrimary()
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parents:
diff changeset
938 {
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parents:
diff changeset
939 Expression expr = ParsePrimaryStart();
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parents:
diff changeset
940 while (true)
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parents:
diff changeset
941 {
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parents:
diff changeset
942 if (token.id == TokenId.Dot)
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parents:
diff changeset
943 {
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parents:
diff changeset
944 NextToken();
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parents:
diff changeset
945 expr = ParseMemberAccess(null, expr);
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parents:
diff changeset
946 }
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parents:
diff changeset
947 else if (token.id == TokenId.OpenBracket)
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parents:
diff changeset
948 {
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parents:
diff changeset
949 expr = ParseElementAccess(expr);
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parents:
diff changeset
950 }
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parents:
diff changeset
951 else
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parents:
diff changeset
952 {
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parents:
diff changeset
953 break;
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parents:
diff changeset
954 }
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parents:
diff changeset
955 }
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parents:
diff changeset
956 return expr;
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parents:
diff changeset
957 }
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parents:
diff changeset
958
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parents:
diff changeset
959 Expression ParsePrimaryStart()
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parents:
diff changeset
960 {
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parents:
diff changeset
961 switch (token.id)
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parents:
diff changeset
962 {
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parents:
diff changeset
963 case TokenId.Identifier:
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parents:
diff changeset
964 return ParseIdentifier();
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parents:
diff changeset
965 case TokenId.StringLiteral:
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parents:
diff changeset
966 return ParseStringLiteral();
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parents:
diff changeset
967 case TokenId.IntegerLiteral:
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parents:
diff changeset
968 return ParseIntegerLiteral();
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parents:
diff changeset
969 case TokenId.RealLiteral:
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parents:
diff changeset
970 return ParseRealLiteral();
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parents:
diff changeset
971 case TokenId.OpenParen:
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parents:
diff changeset
972 return ParseParenExpression();
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parents:
diff changeset
973 default:
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parents:
diff changeset
974 throw ParseError(Res.ExpressionExpected);
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parents:
diff changeset
975 }
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parents:
diff changeset
976 }
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parents:
diff changeset
977
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parents:
diff changeset
978 Expression ParseStringLiteral()
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parents:
diff changeset
979 {
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parents:
diff changeset
980 ValidateToken(TokenId.StringLiteral);
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981 char quote = token.text[0];
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982 string s = token.text.Substring(1, token.text.Length - 2);
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983 int start = 0;
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984 while (true)
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985 {
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986 int i = s.IndexOf(quote, start);
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987 if (i < 0) break;
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988 s = s.Remove(i, 1);
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989 start = i + 1;
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990 }
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991 if (quote == '\'')
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992 {
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993 if (s.Length != 1)
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994 throw ParseError(Res.InvalidCharacterLiteral);
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995 NextToken();
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996 return CreateLiteral(s[0], s);
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997 }
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998 NextToken();
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999 return CreateLiteral(s, s);
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1000 }
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1001
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parents:
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1002 Expression ParseIntegerLiteral()
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1003 {
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1004 ValidateToken(TokenId.IntegerLiteral);
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1005 string text = token.text;
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1006 if (text[0] != '-')
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1007 {
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1008 ulong value;
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1009 if (!UInt64.TryParse(text, out value))
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1010 throw ParseError(Res.InvalidIntegerLiteral, text);
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1011 NextToken();
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1012 if (value <= (ulong)Int32.MaxValue) return CreateLiteral((int)value, text);
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1013 if (value <= (ulong)UInt32.MaxValue) return CreateLiteral((uint)value, text);
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1014 if (value <= (ulong)Int64.MaxValue) return CreateLiteral((long)value, text);
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1015 return CreateLiteral(value, text);
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1016 }
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1017 else
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1018 {
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1019 long value;
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1020 if (!Int64.TryParse(text, out value))
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1021 throw ParseError(Res.InvalidIntegerLiteral, text);
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1022 NextToken();
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1023 if (value >= Int32.MinValue && value <= Int32.MaxValue)
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1024 return CreateLiteral((int)value, text);
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1025 return CreateLiteral(value, text);
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1026 }
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1027 }
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1028
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1029 Expression ParseRealLiteral()
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1030 {
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1031 ValidateToken(TokenId.RealLiteral);
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1032 string text = token.text;
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1033 object value = null;
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1034 char last = text[text.Length - 1];
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1035 if (last == 'F' || last == 'f')
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1036 {
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1037 float f;
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1038 if (Single.TryParse(text.Substring(0, text.Length - 1), out f)) value = f;
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1039 }
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1040 else
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1041 {
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1042 double d;
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1043 if (Double.TryParse(text, out d)) value = d;
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1044 }
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1045 if (value == null) throw ParseError(Res.InvalidRealLiteral, text);
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1046 NextToken();
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1047 return CreateLiteral(value, text);
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1048 }
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1049
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1050 Expression CreateLiteral(object value, string text)
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1051 {
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1052 ConstantExpression expr = Expression.Constant(value);
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1053 literals.Add(expr, text);
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1054 return expr;
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1055 }
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1056
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1057 Expression ParseParenExpression()
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1058 {
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1059 ValidateToken(TokenId.OpenParen, Res.OpenParenExpected);
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1060 NextToken();
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1061 Expression e = ParseExpression();
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1062 ValidateToken(TokenId.CloseParen, Res.CloseParenOrOperatorExpected);
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1063 NextToken();
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1064 return e;
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1065 }
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1066
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parents:
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1067 Expression ParseIdentifier()
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1068 {
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1069 ValidateToken(TokenId.Identifier);
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1070 object value;
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1071 if (keywords.TryGetValue(token.text, out value))
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1072 {
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1073 if (value is Type) return ParseTypeAccess((Type)value);
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1074 if (value == (object)keywordIt) return ParseIt();
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1075 if (value == (object)keywordIif) return ParseIif();
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1076 if (value == (object)keywordNew) return ParseNew();
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1077 NextToken();
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1078 return (Expression)value;
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1079 }
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1080 if (symbols.TryGetValue(token.text, out value) ||
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1081 externals != null && externals.TryGetValue(token.text, out value))
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1082 {
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1083 Expression expr = value as Expression;
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1084 if (expr == null)
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1085 {
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1086 expr = Expression.Constant(value);
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1087 }
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1088 else
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1089 {
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1090 LambdaExpression lambda = expr as LambdaExpression;
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1091 if (lambda != null) return ParseLambdaInvocation(lambda);
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1092 }
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1093 NextToken();
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1094 return expr;
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1095 }
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1096 if (it != null) return ParseMemberAccess(null, it);
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1097 throw ParseError(Res.UnknownIdentifier, token.text);
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1098 }
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1099
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parents:
diff changeset
1100 Expression ParseIt()
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parents:
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1101 {
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1102 if (it == null)
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1103 throw ParseError(Res.NoItInScope);
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1104 NextToken();
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1105 return it;
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1106 }
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1107
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parents:
diff changeset
1108 Expression ParseIif()
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1109 {
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1110 int errorPos = token.pos;
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1111 NextToken();
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1112 Expression[] args = ParseArgumentList();
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1113 if (args.Length != 3)
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1114 throw ParseError(errorPos, Res.IifRequiresThreeArgs);
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1115 return GenerateConditional(args[0], args[1], args[2], errorPos);
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1116 }
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1117
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1118 Expression GenerateConditional(Expression test, Expression expr1, Expression expr2, int errorPos)
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1119 {
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1120 if (test.Type != typeof(bool))
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1121 throw ParseError(errorPos, Res.FirstExprMustBeBool);
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1122 if (expr1.Type != expr2.Type)
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1123 {
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1124 Expression expr1as2 = expr2 != nullLiteral ? PromoteExpression(expr1, expr2.Type, true) : null;
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1125 Expression expr2as1 = expr1 != nullLiteral ? PromoteExpression(expr2, expr1.Type, true) : null;
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1126 if (expr1as2 != null && expr2as1 == null)
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1127 {
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1128 expr1 = expr1as2;
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1129 }
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1130 else if (expr2as1 != null && expr1as2 == null)
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1131 {
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1132 expr2 = expr2as1;
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1133 }
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1134 else
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1135 {
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1136 string type1 = expr1 != nullLiteral ? expr1.Type.Name : "null";
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1137 string type2 = expr2 != nullLiteral ? expr2.Type.Name : "null";
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1138 if (expr1as2 != null && expr2as1 != null)
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1139 throw ParseError(errorPos, Res.BothTypesConvertToOther, type1, type2);
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diff changeset
1140 throw ParseError(errorPos, Res.NeitherTypeConvertsToOther, type1, type2);
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1141 }
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1142 }
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1143 return Expression.Condition(test, expr1, expr2);
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1144 }
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1145
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diff changeset
1146 Expression ParseNew()
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1147 {
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diff changeset
1148 NextToken();
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1149 ValidateToken(TokenId.OpenParen, Res.OpenParenExpected);
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1150 NextToken();
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1151 List<DynamicProperty> properties = new List<DynamicProperty>();
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1152 List<Expression> expressions = new List<Expression>();
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1153 while (true)
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1154 {
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1155 int exprPos = token.pos;
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1156 Expression expr = ParseExpression();
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1157 string propName;
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1158 if (TokenIdentifierIs("as"))
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1159 {
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1160 NextToken();
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1161 propName = GetIdentifier();
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1162 NextToken();
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1163 }
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1164 else
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1165 {
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1166 MemberExpression me = expr as MemberExpression;
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1167 if (me == null) throw ParseError(exprPos, Res.MissingAsClause);
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1168 propName = me.Member.Name;
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1169 }
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1170 expressions.Add(expr);
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1171 properties.Add(new DynamicProperty(propName, expr.Type));
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1172 if (token.id != TokenId.Comma) break;
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1173 NextToken();
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1174 }
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1175 ValidateToken(TokenId.CloseParen, Res.CloseParenOrCommaExpected);
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1176 NextToken();
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1177 Type type = DynamicExpression.CreateClass(properties);
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1178 MemberBinding[] bindings = new MemberBinding[properties.Count];
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1179 for (int i = 0; i < bindings.Length; i++)
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1180 bindings[i] = Expression.Bind(type.GetProperty(properties[i].Name), expressions[i]);
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1181 return Expression.MemberInit(Expression.New(type), bindings);
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1182 }
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1183
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1184 Expression ParseLambdaInvocation(LambdaExpression lambda)
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1185 {
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1186 int errorPos = token.pos;
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1187 NextToken();
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1188 Expression[] args = ParseArgumentList();
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1189 MethodBase method;
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1190 if (FindMethod(lambda.Type, "Invoke", false, args, out method) != 1)
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1191 throw ParseError(errorPos, Res.ArgsIncompatibleWithLambda);
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1192 return Expression.Invoke(lambda, args);
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1193 }
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1194
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1195 Expression ParseTypeAccess(Type type)
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1196 {
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1197 int errorPos = token.pos;
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1198 NextToken();
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1199 if (token.id == TokenId.Question)
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1200 {
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1201 if (!type.IsValueType || IsNullableType(type))
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1202 throw ParseError(errorPos, Res.TypeHasNoNullableForm, GetTypeName(type));
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1203 type = typeof(Nullable<>).MakeGenericType(type);
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1204 NextToken();
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1205 }
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parents:
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1206 if (token.id == TokenId.OpenParen)
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1207 {
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1208 Expression[] args = ParseArgumentList();
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diff changeset
1209 MethodBase method;
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1210 switch (FindBestMethod(type.GetConstructors(), args, out method))
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1211 {
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1212 case 0:
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1213 if (args.Length == 1)
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1214 return GenerateConversion(args[0], type, errorPos);
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1215 throw ParseError(errorPos, Res.NoMatchingConstructor, GetTypeName(type));
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1216 case 1:
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1217 return Expression.New((ConstructorInfo)method, args);
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1218 default:
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1219 throw ParseError(errorPos, Res.AmbiguousConstructorInvocation, GetTypeName(type));
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1220 }
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1221 }
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1222 ValidateToken(TokenId.Dot, Res.DotOrOpenParenExpected);
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1223 NextToken();
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1224 return ParseMemberAccess(type, null);
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1225 }
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1226
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1227 Expression GenerateConversion(Expression expr, Type type, int errorPos)
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1228 {
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1229 Type exprType = expr.Type;
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1230 if (exprType == type) return expr;
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1231 if (exprType.IsValueType && type.IsValueType)
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1232 {
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1233 if ((IsNullableType(exprType) || IsNullableType(type)) &&
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parents:
diff changeset
1234 GetNonNullableType(exprType) == GetNonNullableType(type))
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1235 return Expression.Convert(expr, type);
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1236 if ((IsNumericType(exprType) || IsEnumType(exprType)) &&
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1237 (IsNumericType(type)) || IsEnumType(type))
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1238 return Expression.ConvertChecked(expr, type);
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1239 }
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1240 if (exprType.IsAssignableFrom(type) || type.IsAssignableFrom(exprType) ||
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diff changeset
1241 exprType.IsInterface || type.IsInterface)
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1242 return Expression.Convert(expr, type);
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1243 throw ParseError(errorPos, Res.CannotConvertValue,
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1244 GetTypeName(exprType), GetTypeName(type));
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1245 }
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1246
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1247 Expression ParseMemberAccess(Type type, Expression instance)
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1248 {
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1249 if (instance != null) type = instance.Type;
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1250 int errorPos = token.pos;
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1251 string id = GetIdentifier();
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1252 NextToken();
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1253 if (token.id == TokenId.OpenParen)
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1254 {
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diff changeset
1255 if (instance != null && type != typeof(string))
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parents:
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1256 {
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1257 Type enumerableType = FindGenericType(typeof(IEnumerable<>), type);
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1258 if (enumerableType != null)
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1259 {
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1260 Type elementType = enumerableType.GetGenericArguments()[0];
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1261 return ParseAggregate(instance, elementType, id, errorPos);
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1262 }
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1263 }
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1264 Expression[] args = ParseArgumentList();
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1265 MethodBase mb;
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1266 switch (FindMethod(type, id, instance == null, args, out mb))
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1267 {
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1268 case 0:
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1269 throw ParseError(errorPos, Res.NoApplicableMethod,
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parents:
diff changeset
1270 id, GetTypeName(type));
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1271 case 1:
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1272 MethodInfo method = (MethodInfo)mb;
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diff changeset
1273 if (!IsPredefinedType(method.DeclaringType))
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1274 throw ParseError(errorPos, Res.MethodsAreInaccessible, GetTypeName(method.DeclaringType));
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diff changeset
1275 if (method.ReturnType == typeof(void))
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1276 throw ParseError(errorPos, Res.MethodIsVoid,
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diff changeset
1277 id, GetTypeName(method.DeclaringType));
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1278 return Expression.Call(instance, (MethodInfo)method, args);
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diff changeset
1279 default:
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1280 throw ParseError(errorPos, Res.AmbiguousMethodInvocation,
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parents:
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1281 id, GetTypeName(type));
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1282 }
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1283 }
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1284 else
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parents:
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1285 {
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1286 MemberInfo member = FindPropertyOrField(type, id, instance == null);
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diff changeset
1287 if (member == null)
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1288 throw ParseError(errorPos, Res.UnknownPropertyOrField,
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parents:
diff changeset
1289 id, GetTypeName(type));
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1290 return member is PropertyInfo ?
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1291 Expression.Property(instance, (PropertyInfo)member) :
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1292 Expression.Field(instance, (FieldInfo)member);
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1293 }
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parents:
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1294 }
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parents:
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1295
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parents:
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1296 static Type FindGenericType(Type generic, Type type)
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diff changeset
1297 {
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diff changeset
1298 while (type != null && type != typeof(object))
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1299 {
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1300 if (type.IsGenericType && type.GetGenericTypeDefinition() == generic) return type;
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diff changeset
1301 if (generic.IsInterface)
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1302 {
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parents:
diff changeset
1303 foreach (Type intfType in type.GetInterfaces())
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1304 {
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1305 Type found = FindGenericType(generic, intfType);
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1306 if (found != null) return found;
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1307 }
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1308 }
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1309 type = type.BaseType;
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diff changeset
1310 }
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1311 return null;
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diff changeset
1312 }
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diff changeset
1313
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diff changeset
1314 Expression ParseAggregate(Expression instance, Type elementType, string methodName, int errorPos)
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1315 {
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1316 ParameterExpression outerIt = it;
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1317 ParameterExpression innerIt = Expression.Parameter(elementType, "");
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1318 it = innerIt;
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1319 Expression[] args = ParseArgumentList();
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1320 it = outerIt;
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diff changeset
1321 MethodBase signature;
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1322 if (FindMethod(typeof(IEnumerableSignatures), methodName, false, args, out signature) != 1)
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1323 throw ParseError(errorPos, Res.NoApplicableAggregate, methodName);
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diff changeset
1324 Type[] typeArgs;
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1325 if (signature.Name == "Min" || signature.Name == "Max")
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1326 {
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1327 typeArgs = new Type[] { elementType, args[0].Type };
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1328 }
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1329 else
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1330 {
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1331 typeArgs = new Type[] { elementType };
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1332 }
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1333 if (args.Length == 0)
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1334 {
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1335 args = new Expression[] { instance };
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1336 }
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1337 else
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1338 {
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1339 args = new Expression[] { instance, Expression.Lambda(args[0], innerIt) };
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1340 }
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1341 return Expression.Call(typeof(Enumerable), signature.Name, typeArgs, args);
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1342 }
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1343
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1344 Expression[] ParseArgumentList()
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1345 {
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1346 ValidateToken(TokenId.OpenParen, Res.OpenParenExpected);
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diff changeset
1347 NextToken();
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1348 Expression[] args = token.id != TokenId.CloseParen ? ParseArguments() : new Expression[0];
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1349 ValidateToken(TokenId.CloseParen, Res.CloseParenOrCommaExpected);
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1350 NextToken();
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1351 return args;
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1352 }
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1353
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1354 Expression[] ParseArguments()
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1355 {
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diff changeset
1356 List<Expression> argList = new List<Expression>();
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diff changeset
1357 while (true)
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1358 {
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diff changeset
1359 argList.Add(ParseExpression());
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1360 if (token.id != TokenId.Comma) break;
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1361 NextToken();
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1362 }
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1363 return argList.ToArray();
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diff changeset
1364 }
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1365
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diff changeset
1366 Expression ParseElementAccess(Expression expr)
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1367 {
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diff changeset
1368 int errorPos = token.pos;
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diff changeset
1369 ValidateToken(TokenId.OpenBracket, Res.OpenParenExpected);
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parents:
diff changeset
1370 NextToken();
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diff changeset
1371 Expression[] args = ParseArguments();
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1372 ValidateToken(TokenId.CloseBracket, Res.CloseBracketOrCommaExpected);
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diff changeset
1373 NextToken();
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diff changeset
1374 if (expr.Type.IsArray)
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1375 {
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1376 if (expr.Type.GetArrayRank() != 1 || args.Length != 1)
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1377 throw ParseError(errorPos, Res.CannotIndexMultiDimArray);
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diff changeset
1378 Expression index = PromoteExpression(args[0], typeof(int), true);
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diff changeset
1379 if (index == null)
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diff changeset
1380 throw ParseError(errorPos, Res.InvalidIndex);
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diff changeset
1381 return Expression.ArrayIndex(expr, index);
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1382 }
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1383 else
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1384 {
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diff changeset
1385 MethodBase mb;
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1386 switch (FindIndexer(expr.Type, args, out mb))
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1387 {
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diff changeset
1388 case 0:
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1389 throw ParseError(errorPos, Res.NoApplicableIndexer,
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parents:
diff changeset
1390 GetTypeName(expr.Type));
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1391 case 1:
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1392 return Expression.Call(expr, (MethodInfo)mb, args);
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diff changeset
1393 default:
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1394 throw ParseError(errorPos, Res.AmbiguousIndexerInvocation,
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parents:
diff changeset
1395 GetTypeName(expr.Type));
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parents:
diff changeset
1396 }
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1397 }
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1398 }
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diff changeset
1399
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1400 static bool IsPredefinedType(Type type)
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1401 {
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1402 foreach (Type t in predefinedTypes) if (t == type) return true;
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1403 return false;
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parents:
diff changeset
1404 }
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1405
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1406 static bool IsNullableType(Type type)
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1407 {
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diff changeset
1408 return type.IsGenericType && type.GetGenericTypeDefinition() == typeof(Nullable<>);
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1409 }
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parents:
diff changeset
1410
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diff changeset
1411 static Type GetNonNullableType(Type type)
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1412 {
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diff changeset
1413 return IsNullableType(type) ? type.GetGenericArguments()[0] : type;
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diff changeset
1414 }
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1415
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diff changeset
1416 static string GetTypeName(Type type)
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1417 {
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diff changeset
1418 Type baseType = GetNonNullableType(type);
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diff changeset
1419 string s = baseType.Name;
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1420 if (type != baseType) s += '?';
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1421 return s;
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parents:
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1422 }
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parents:
diff changeset
1423
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diff changeset
1424 static bool IsNumericType(Type type)
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1425 {
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diff changeset
1426 return GetNumericTypeKind(type) != 0;
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parents:
diff changeset
1427 }
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diff changeset
1428
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1429 static bool IsSignedIntegralType(Type type)
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1430 {
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diff changeset
1431 return GetNumericTypeKind(type) == 2;
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parents:
diff changeset
1432 }
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parents:
diff changeset
1433
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1434 static bool IsUnsignedIntegralType(Type type)
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1435 {
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diff changeset
1436 return GetNumericTypeKind(type) == 3;
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parents:
diff changeset
1437 }
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parents:
diff changeset
1438
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parents:
diff changeset
1439 static int GetNumericTypeKind(Type type)
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1440 {
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diff changeset
1441 type = GetNonNullableType(type);
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1442 if (type.IsEnum) return 0;
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parents:
diff changeset
1443 switch (Type.GetTypeCode(type))
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1444 {
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diff changeset
1445 case TypeCode.Char:
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parents:
diff changeset
1446 case TypeCode.Single:
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parents:
diff changeset
1447 case TypeCode.Double:
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parents:
diff changeset
1448 case TypeCode.Decimal:
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1449 return 1;
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parents:
diff changeset
1450 case TypeCode.SByte:
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parents:
diff changeset
1451 case TypeCode.Int16:
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parents:
diff changeset
1452 case TypeCode.Int32:
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parents:
diff changeset
1453 case TypeCode.Int64:
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1454 return 2;
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parents:
diff changeset
1455 case TypeCode.Byte:
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parents:
diff changeset
1456 case TypeCode.UInt16:
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parents:
diff changeset
1457 case TypeCode.UInt32:
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parents:
diff changeset
1458 case TypeCode.UInt64:
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diff changeset
1459 return 3;
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diff changeset
1460 default:
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1461 return 0;
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parents:
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1462 }
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parents:
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1463 }
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parents:
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1464
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diff changeset
1465 static bool IsEnumType(Type type)
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1466 {
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1467 return GetNonNullableType(type).IsEnum;
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parents:
diff changeset
1468 }
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parents:
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1469
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1470 void CheckAndPromoteOperand(Type signatures, string opName, ref Expression expr, int errorPos)
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1471 {
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diff changeset
1472 Expression[] args = new Expression[] { expr };
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diff changeset
1473 MethodBase method;
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1474 if (FindMethod(signatures, "F", false, args, out method) != 1)
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diff changeset
1475 throw ParseError(errorPos, Res.IncompatibleOperand,
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1476 opName, GetTypeName(args[0].Type));
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1477 expr = args[0];
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1478 }
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1479
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1480 void CheckAndPromoteOperands(Type signatures, string opName, ref Expression left, ref Expression right, int errorPos)
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1481 {
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1482 Expression[] args = new Expression[] { left, right };
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diff changeset
1483 MethodBase method;
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1484 if (FindMethod(signatures, "F", false, args, out method) != 1)
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1485 throw IncompatibleOperandsError(opName, left, right, errorPos);
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1486 left = args[0];
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1487 right = args[1];
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1488 }
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1489
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1490 Exception IncompatibleOperandsError(string opName, Expression left, Expression right, int pos)
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1491 {
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1492 return ParseError(pos, Res.IncompatibleOperands,
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1493 opName, GetTypeName(left.Type), GetTypeName(right.Type));
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1494 }
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diff changeset
1495
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1496 MemberInfo FindPropertyOrField(Type type, string memberName, bool staticAccess)
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1497 {
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diff changeset
1498 BindingFlags flags = BindingFlags.Public | BindingFlags.DeclaredOnly |
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diff changeset
1499 (staticAccess ? BindingFlags.Static : BindingFlags.Instance);
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1500 foreach (Type t in SelfAndBaseTypes(type))
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1501 {
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1502 MemberInfo[] members = t.FindMembers(MemberTypes.Property | MemberTypes.Field,
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1503 flags, Type.FilterNameIgnoreCase, memberName);
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1504 if (members.Length != 0) return members[0];
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1505 }
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1506 return null;
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parents:
diff changeset
1507 }
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1508
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1509 int FindMethod(Type type, string methodName, bool staticAccess, Expression[] args, out MethodBase method)
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1510 {
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diff changeset
1511 BindingFlags flags = BindingFlags.Public | BindingFlags.DeclaredOnly |
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1512 (staticAccess ? BindingFlags.Static : BindingFlags.Instance);
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1513 foreach (Type t in SelfAndBaseTypes(type))
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1514 {
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diff changeset
1515 MemberInfo[] members = t.FindMembers(MemberTypes.Method,
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1516 flags, Type.FilterNameIgnoreCase, methodName);
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1517 int count = FindBestMethod(members.Cast<MethodBase>(), args, out method);
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1518 if (count != 0) return count;
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1519 }
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1520 method = null;
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1521 return 0;
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parents:
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1522 }
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1523
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1524 int FindIndexer(Type type, Expression[] args, out MethodBase method)
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1525 {
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diff changeset
1526 foreach (Type t in SelfAndBaseTypes(type))
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1527 {
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diff changeset
1528 MemberInfo[] members = t.GetDefaultMembers();
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1529 if (members.Length != 0)
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1530 {
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1531 IEnumerable<MethodBase> methods = members.
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diff changeset
1532 OfType<PropertyInfo>().
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diff changeset
1533 Select(p => (MethodBase)p.GetGetMethod()).
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1534 Where(m => m != null);
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1535 int count = FindBestMethod(methods, args, out method);
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1536 if (count != 0) return count;
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1537 }
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1538 }
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1539 method = null;
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1540 return 0;
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parents:
diff changeset
1541 }
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1542
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1543 static IEnumerable<Type> SelfAndBaseTypes(Type type)
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1544 {
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1545 if (type.IsInterface)
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1546 {
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1547 List<Type> types = new List<Type>();
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1548 AddInterface(types, type);
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1549 return types;
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1550 }
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1551 return SelfAndBaseClasses(type);
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1552 }
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1553
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diff changeset
1554 static IEnumerable<Type> SelfAndBaseClasses(Type type)
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1555 {
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1556 while (type != null)
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1557 {
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1558 yield return type;
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diff changeset
1559 type = type.BaseType;
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1560 }
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1561 }
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1562
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1563 static void AddInterface(List<Type> types, Type type)
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1564 {
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diff changeset
1565 if (!types.Contains(type))
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1566 {
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diff changeset
1567 types.Add(type);
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1568 foreach (Type t in type.GetInterfaces()) AddInterface(types, t);
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1569 }
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1570 }
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1571
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parents:
diff changeset
1572 class MethodData
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1573 {
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1574 public MethodBase MethodBase;
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1575 public ParameterInfo[] Parameters;
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1576 public Expression[] Args;
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1577 }
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1578
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1579 int FindBestMethod(IEnumerable<MethodBase> methods, Expression[] args, out MethodBase method)
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1580 {
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diff changeset
1581 MethodData[] applicable = methods.
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1582 Select(m => new MethodData { MethodBase = m, Parameters = m.GetParameters() }).
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diff changeset
1583 Where(m => IsApplicable(m, args)).
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1584 ToArray();
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diff changeset
1585 if (applicable.Length > 1)
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1586 {
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diff changeset
1587 applicable = applicable.
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1588 Where(m => applicable.All(n => m == n || IsBetterThan(args, m, n))).
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diff changeset
1589 ToArray();
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1590 }
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1591 if (applicable.Length == 1)
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1592 {
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1593 MethodData md = applicable[0];
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1594 for (int i = 0; i < args.Length; i++) args[i] = md.Args[i];
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1595 method = md.MethodBase;
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1596 }
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1597 else
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1598 {
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1599 method = null;
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1600 }
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1601 return applicable.Length;
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1602 }
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1603
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1604 bool IsApplicable(MethodData method, Expression[] args)
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1605 {
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1606 if (method.Parameters.Length != args.Length) return false;
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1607 Expression[] promotedArgs = new Expression[args.Length];
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1608 for (int i = 0; i < args.Length; i++)
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1609 {
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1610 ParameterInfo pi = method.Parameters[i];
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1611 if (pi.IsOut) return false;
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1612 Expression promoted = PromoteExpression(args[i], pi.ParameterType, false);
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1613 if (promoted == null) return false;
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1614 promotedArgs[i] = promoted;
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1615 }
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1616 method.Args = promotedArgs;
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1617 return true;
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parents:
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1618 }
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1619
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parents:
diff changeset
1620 Expression PromoteExpression(Expression expr, Type type, bool exact)
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parents:
diff changeset
1621 {
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parents:
diff changeset
1622 if (expr.Type == type) return expr;
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parents:
diff changeset
1623 if (expr is ConstantExpression)
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parents:
diff changeset
1624 {
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parents:
diff changeset
1625 ConstantExpression ce = (ConstantExpression)expr;
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parents:
diff changeset
1626 if (ce == nullLiteral)
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parents:
diff changeset
1627 {
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parents:
diff changeset
1628 if (!type.IsValueType || IsNullableType(type))
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parents:
diff changeset
1629 return Expression.Constant(null, type);
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parents:
diff changeset
1630 }
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parents:
diff changeset
1631 else
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parents:
diff changeset
1632 {
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parents:
diff changeset
1633 string text;
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parents:
diff changeset
1634 if (literals.TryGetValue(ce, out text))
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parents:
diff changeset
1635 {
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parents:
diff changeset
1636 Type target = GetNonNullableType(type);
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parents:
diff changeset
1637 Object value = null;
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parents:
diff changeset
1638 switch (Type.GetTypeCode(ce.Type))
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parents:
diff changeset
1639 {
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parents:
diff changeset
1640 case TypeCode.Int32:
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parents:
diff changeset
1641 case TypeCode.UInt32:
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parents:
diff changeset
1642 case TypeCode.Int64:
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parents:
diff changeset
1643 case TypeCode.UInt64:
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parents:
diff changeset
1644 value = ParseNumber(text, target);
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parents:
diff changeset
1645 break;
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parents:
diff changeset
1646 case TypeCode.Double:
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parents:
diff changeset
1647 if (target == typeof(decimal)) value = ParseNumber(text, target);
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parents:
diff changeset
1648 break;
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parents:
diff changeset
1649 case TypeCode.String:
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parents:
diff changeset
1650 value = ParseEnum(text, target);
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parents:
diff changeset
1651 break;
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parents:
diff changeset
1652 }
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parents:
diff changeset
1653 if (value != null)
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parents:
diff changeset
1654 return Expression.Constant(value, type);
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parents:
diff changeset
1655 }
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parents:
diff changeset
1656 }
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parents:
diff changeset
1657 }
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parents:
diff changeset
1658 if (IsCompatibleWith(expr.Type, type))
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parents:
diff changeset
1659 {
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parents:
diff changeset
1660 if (type.IsValueType || exact) return Expression.Convert(expr, type);
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parents:
diff changeset
1661 return expr;
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parents:
diff changeset
1662 }
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parents:
diff changeset
1663 return null;
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parents:
diff changeset
1664 }
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parents:
diff changeset
1665
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parents:
diff changeset
1666 static object ParseNumber(string text, Type type)
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parents:
diff changeset
1667 {
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parents:
diff changeset
1668 switch (Type.GetTypeCode(GetNonNullableType(type)))
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parents:
diff changeset
1669 {
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parents:
diff changeset
1670 case TypeCode.SByte:
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parents:
diff changeset
1671 sbyte sb;
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parents:
diff changeset
1672 if (sbyte.TryParse(text, out sb)) return sb;
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parents:
diff changeset
1673 break;
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parents:
diff changeset
1674 case TypeCode.Byte:
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parents:
diff changeset
1675 byte b;
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parents:
diff changeset
1676 if (byte.TryParse(text, out b)) return b;
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parents:
diff changeset
1677 break;
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parents:
diff changeset
1678 case TypeCode.Int16:
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parents:
diff changeset
1679 short s;
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parents:
diff changeset
1680 if (short.TryParse(text, out s)) return s;
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parents:
diff changeset
1681 break;
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parents:
diff changeset
1682 case TypeCode.UInt16:
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parents:
diff changeset
1683 ushort us;
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parents:
diff changeset
1684 if (ushort.TryParse(text, out us)) return us;
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parents:
diff changeset
1685 break;
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parents:
diff changeset
1686 case TypeCode.Int32:
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parents:
diff changeset
1687 int i;
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parents:
diff changeset
1688 if (int.TryParse(text, out i)) return i;
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parents:
diff changeset
1689 break;
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parents:
diff changeset
1690 case TypeCode.UInt32:
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parents:
diff changeset
1691 uint ui;
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parents:
diff changeset
1692 if (uint.TryParse(text, out ui)) return ui;
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parents:
diff changeset
1693 break;
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parents:
diff changeset
1694 case TypeCode.Int64:
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parents:
diff changeset
1695 long l;
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parents:
diff changeset
1696 if (long.TryParse(text, out l)) return l;
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parents:
diff changeset
1697 break;
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parents:
diff changeset
1698 case TypeCode.UInt64:
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parents:
diff changeset
1699 ulong ul;
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parents:
diff changeset
1700 if (ulong.TryParse(text, out ul)) return ul;
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parents:
diff changeset
1701 break;
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parents:
diff changeset
1702 case TypeCode.Single:
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parents:
diff changeset
1703 float f;
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parents:
diff changeset
1704 if (float.TryParse(text, out f)) return f;
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parents:
diff changeset
1705 break;
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parents:
diff changeset
1706 case TypeCode.Double:
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parents:
diff changeset
1707 double d;
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parents:
diff changeset
1708 if (double.TryParse(text, out d)) return d;
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parents:
diff changeset
1709 break;
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parents:
diff changeset
1710 case TypeCode.Decimal:
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parents:
diff changeset
1711 decimal e;
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parents:
diff changeset
1712 if (decimal.TryParse(text, out e)) return e;
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parents:
diff changeset
1713 break;
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parents:
diff changeset
1714 }
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parents:
diff changeset
1715 return null;
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parents:
diff changeset
1716 }
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parents:
diff changeset
1717
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parents:
diff changeset
1718 static object ParseEnum(string name, Type type)
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parents:
diff changeset
1719 {
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parents:
diff changeset
1720 if (type.IsEnum)
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parents:
diff changeset
1721 {
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parents:
diff changeset
1722 MemberInfo[] memberInfos = type.FindMembers(MemberTypes.Field,
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parents:
diff changeset
1723 BindingFlags.Public | BindingFlags.DeclaredOnly | BindingFlags.Static,
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parents:
diff changeset
1724 Type.FilterNameIgnoreCase, name);
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parents:
diff changeset
1725 if (memberInfos.Length != 0) return ((FieldInfo)memberInfos[0]).GetValue(null);
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parents:
diff changeset
1726 }
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parents:
diff changeset
1727 return null;
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parents:
diff changeset
1728 }
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parents:
diff changeset
1729
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parents:
diff changeset
1730 static bool IsCompatibleWith(Type source, Type target)
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parents:
diff changeset
1731 {
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parents:
diff changeset
1732 if (source == target) return true;
060f02cd4591 Initial commit, pre airport work
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parents:
diff changeset
1733 if (!target.IsValueType) return target.IsAssignableFrom(source);
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parents:
diff changeset
1734 Type st = GetNonNullableType(source);
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parents:
diff changeset
1735 Type tt = GetNonNullableType(target);
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parents:
diff changeset
1736 if (st != source && tt == target) return false;
060f02cd4591 Initial commit, pre airport work
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parents:
diff changeset
1737 TypeCode sc = st.IsEnum ? TypeCode.Object : Type.GetTypeCode(st);
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parents:
diff changeset
1738 TypeCode tc = tt.IsEnum ? TypeCode.Object : Type.GetTypeCode(tt);
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stevenh7776 stevenhollidge@hotmail.com
parents:
diff changeset
1739 switch (sc)
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parents:
diff changeset
1740 {
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parents:
diff changeset
1741 case TypeCode.SByte:
060f02cd4591 Initial commit, pre airport work
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parents:
diff changeset
1742 switch (tc)
060f02cd4591 Initial commit, pre airport work
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parents:
diff changeset
1743 {
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stevenh7776 stevenhollidge@hotmail.com
parents:
diff changeset
1744 case TypeCode.SByte:
060f02cd4591 Initial commit, pre airport work
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parents:
diff changeset
1745 case TypeCode.Int16:
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parents:
diff changeset
1746 case TypeCode.Int32:
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parents:
diff changeset
1747 case TypeCode.Int64:
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parents:
diff changeset
1748 case TypeCode.Single:
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parents:
diff changeset
1749 case TypeCode.Double:
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parents:
diff changeset
1750 case TypeCode.Decimal:
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parents:
diff changeset
1751 return true;
060f02cd4591 Initial commit, pre airport work
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parents:
diff changeset
1752 }
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parents:
diff changeset
1753 break;
060f02cd4591 Initial commit, pre airport work
stevenh7776 stevenhollidge@hotmail.com
parents:
diff changeset
1754 case TypeCode.Byte:
060f02cd4591 Initial commit, pre airport work
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parents:
diff changeset
1755 switch (tc)
060f02cd4591 Initial commit, pre airport work
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parents:
diff changeset
1756 {
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stevenh7776 stevenhollidge@hotmail.com
parents:
diff changeset
1757 case TypeCode.Byte:
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parents:
diff changeset
1758 case TypeCode.Int16:
060f02cd4591 Initial commit, pre airport work
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parents:
diff changeset
1759 case TypeCode.UInt16:
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parents:
diff changeset
1760 case TypeCode.Int32:
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parents:
diff changeset
1761 case TypeCode.UInt32:
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parents:
diff changeset
1762 case TypeCode.Int64:
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parents:
diff changeset
1763 case TypeCode.UInt64:
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parents:
diff changeset
1764 case TypeCode.Single:
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parents:
diff changeset
1765 case TypeCode.Double:
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parents:
diff changeset
1766 case TypeCode.Decimal:
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parents:
diff changeset
1767 return true;
060f02cd4591 Initial commit, pre airport work
stevenh7776 stevenhollidge@hotmail.com
parents:
diff changeset
1768 }
060f02cd4591 Initial commit, pre airport work
stevenh7776 stevenhollidge@hotmail.com
parents:
diff changeset
1769 break;
060f02cd4591 Initial commit, pre airport work
stevenh7776 stevenhollidge@hotmail.com
parents:
diff changeset
1770 case TypeCode.Int16:
060f02cd4591 Initial commit, pre airport work
stevenh7776 stevenhollidge@hotmail.com
parents:
diff changeset
1771 switch (tc)
060f02cd4591 Initial commit, pre airport work
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parents:
diff changeset
1772 {
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stevenh7776 stevenhollidge@hotmail.com
parents:
diff changeset
1773 case TypeCode.Int16:
060f02cd4591 Initial commit, pre airport work
stevenh7776 stevenhollidge@hotmail.com
parents:
diff changeset
1774 case TypeCode.Int32:
060f02cd4591 Initial commit, pre airport work
stevenh7776 stevenhollidge@hotmail.com
parents:
diff changeset
1775 case TypeCode.Int64:
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stevenh7776 stevenhollidge@hotmail.com
parents:
diff changeset
1776 case TypeCode.Single:
060f02cd4591 Initial commit, pre airport work
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parents:
diff changeset
1777 case TypeCode.Double:
060f02cd4591 Initial commit, pre airport work
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parents:
diff changeset
1778 case TypeCode.Decimal:
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parents:
diff changeset
1779 return true;
060f02cd4591 Initial commit, pre airport work
stevenh7776 stevenhollidge@hotmail.com
parents:
diff changeset
1780 }
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stevenh7776 stevenhollidge@hotmail.com
parents:
diff changeset
1781 break;
060f02cd4591 Initial commit, pre airport work
stevenh7776 stevenhollidge@hotmail.com
parents:
diff changeset
1782 case TypeCode.UInt16:
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parents:
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1783 switch (tc)
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1784 {
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parents:
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1785 case TypeCode.UInt16:
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parents:
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1786 case TypeCode.Int32:
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diff changeset
1787 case TypeCode.UInt32:
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parents:
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1788 case TypeCode.Int64:
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1789 case TypeCode.UInt64:
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1790 case TypeCode.Single:
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1791 case TypeCode.Double:
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1792 case TypeCode.Decimal:
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1793 return true;
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1794 }
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1795 break;
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1796 case TypeCode.Int32:
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1797 switch (tc)
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parents:
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1798 {
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1799 case TypeCode.Int32:
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1800 case TypeCode.Int64:
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1801 case TypeCode.Single:
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1802 case TypeCode.Double:
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1803 case TypeCode.Decimal:
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1804 return true;
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1805 }
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1806 break;
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1807 case TypeCode.UInt32:
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1808 switch (tc)
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1809 {
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1810 case TypeCode.UInt32:
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1811 case TypeCode.Int64:
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1812 case TypeCode.UInt64:
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1813 case TypeCode.Single:
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1814 case TypeCode.Double:
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1815 case TypeCode.Decimal:
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1816 return true;
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1817 }
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1818 break;
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1819 case TypeCode.Int64:
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1820 switch (tc)
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1821 {
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1822 case TypeCode.Int64:
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1823 case TypeCode.Single:
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1824 case TypeCode.Double:
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1825 case TypeCode.Decimal:
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1826 return true;
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1827 }
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1828 break;
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1829 case TypeCode.UInt64:
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1830 switch (tc)
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1831 {
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1832 case TypeCode.UInt64:
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1833 case TypeCode.Single:
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diff changeset
1834 case TypeCode.Double:
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diff changeset
1835 case TypeCode.Decimal:
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1836 return true;
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1837 }
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1838 break;
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1839 case TypeCode.Single:
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1840 switch (tc)
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1841 {
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1842 case TypeCode.Single:
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parents:
diff changeset
1843 case TypeCode.Double:
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1844 return true;
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diff changeset
1845 }
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1846 break;
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1847 default:
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1848 if (st == tt) return true;
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1849 break;
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1850 }
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1851 return false;
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parents:
diff changeset
1852 }
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1853
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1854 static bool IsBetterThan(Expression[] args, MethodData m1, MethodData m2)
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1855 {
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1856 bool better = false;
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1857 for (int i = 0; i < args.Length; i++)
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1858 {
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1859 int c = CompareConversions(args[i].Type,
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1860 m1.Parameters[i].ParameterType,
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1861 m2.Parameters[i].ParameterType);
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1862 if (c < 0) return false;
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1863 if (c > 0) better = true;
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1864 }
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1865 return better;
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parents:
diff changeset
1866 }
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1867
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1868 // Return 1 if s -> t1 is a better conversion than s -> t2
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diff changeset
1869 // Return -1 if s -> t2 is a better conversion than s -> t1
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1870 // Return 0 if neither conversion is better
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1871 static int CompareConversions(Type s, Type t1, Type t2)
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1872 {
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1873 if (t1 == t2) return 0;
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diff changeset
1874 if (s == t1) return 1;
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diff changeset
1875 if (s == t2) return -1;
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diff changeset
1876 bool t1t2 = IsCompatibleWith(t1, t2);
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1877 bool t2t1 = IsCompatibleWith(t2, t1);
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1878 if (t1t2 && !t2t1) return 1;
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1879 if (t2t1 && !t1t2) return -1;
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1880 if (IsSignedIntegralType(t1) && IsUnsignedIntegralType(t2)) return 1;
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diff changeset
1881 if (IsSignedIntegralType(t2) && IsUnsignedIntegralType(t1)) return -1;
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1882 return 0;
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diff changeset
1883 }
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diff changeset
1884
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parents:
diff changeset
1885 Expression GenerateEqual(Expression left, Expression right)
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1886 {
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1887 return Expression.Equal(left, right);
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diff changeset
1888 }
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diff changeset
1889
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parents:
diff changeset
1890 Expression GenerateNotEqual(Expression left, Expression right)
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parents:
diff changeset
1891 {
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1892 return Expression.NotEqual(left, right);
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diff changeset
1893 }
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diff changeset
1894
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parents:
diff changeset
1895 Expression GenerateGreaterThan(Expression left, Expression right)
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parents:
diff changeset
1896 {
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diff changeset
1897 if (left.Type == typeof(string))
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parents:
diff changeset
1898 {
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diff changeset
1899 return Expression.GreaterThan(
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diff changeset
1900 GenerateStaticMethodCall("Compare", left, right),
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diff changeset
1901 Expression.Constant(0)
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1902 );
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diff changeset
1903 }
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1904 return Expression.GreaterThan(left, right);
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diff changeset
1905 }
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diff changeset
1906
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parents:
diff changeset
1907 Expression GenerateGreaterThanEqual(Expression left, Expression right)
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parents:
diff changeset
1908 {
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diff changeset
1909 if (left.Type == typeof(string))
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parents:
diff changeset
1910 {
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1911 return Expression.GreaterThanOrEqual(
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diff changeset
1912 GenerateStaticMethodCall("Compare", left, right),
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diff changeset
1913 Expression.Constant(0)
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1914 );
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diff changeset
1915 }
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1916 return Expression.GreaterThanOrEqual(left, right);
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diff changeset
1917 }
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1918
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diff changeset
1919 Expression GenerateLessThan(Expression left, Expression right)
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1920 {
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diff changeset
1921 if (left.Type == typeof(string))
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parents:
diff changeset
1922 {
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1923 return Expression.LessThan(
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diff changeset
1924 GenerateStaticMethodCall("Compare", left, right),
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diff changeset
1925 Expression.Constant(0)
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1926 );
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diff changeset
1927 }
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1928 return Expression.LessThan(left, right);
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diff changeset
1929 }
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diff changeset
1930
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diff changeset
1931 Expression GenerateLessThanEqual(Expression left, Expression right)
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parents:
diff changeset
1932 {
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1933 if (left.Type == typeof(string))
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parents:
diff changeset
1934 {
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diff changeset
1935 return Expression.LessThanOrEqual(
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diff changeset
1936 GenerateStaticMethodCall("Compare", left, right),
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diff changeset
1937 Expression.Constant(0)
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1938 );
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diff changeset
1939 }
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1940 return Expression.LessThanOrEqual(left, right);
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parents:
diff changeset
1941 }
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diff changeset
1942
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parents:
diff changeset
1943 Expression GenerateAdd(Expression left, Expression right)
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parents:
diff changeset
1944 {
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parents:
diff changeset
1945 if (left.Type == typeof(string) && right.Type == typeof(string))
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parents:
diff changeset
1946 {
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parents:
diff changeset
1947 return GenerateStaticMethodCall("Concat", left, right);
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1948 }
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1949 return Expression.Add(left, right);
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diff changeset
1950 }
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parents:
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1951
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parents:
diff changeset
1952 Expression GenerateSubtract(Expression left, Expression right)
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parents:
diff changeset
1953 {
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diff changeset
1954 return Expression.Subtract(left, right);
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diff changeset
1955 }
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parents:
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1956
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parents:
diff changeset
1957 Expression GenerateStringConcat(Expression left, Expression right)
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parents:
diff changeset
1958 {
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diff changeset
1959 return Expression.Call(
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parents:
diff changeset
1960 null,
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parents:
diff changeset
1961 typeof(string).GetMethod("Concat", new[] { typeof(object), typeof(object) }),
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parents:
diff changeset
1962 new[] { left, right });
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parents:
diff changeset
1963 }
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parents:
diff changeset
1964
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parents:
diff changeset
1965 MethodInfo GetStaticMethod(string methodName, Expression left, Expression right)
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1966 {
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1967 return left.Type.GetMethod(methodName, new[] { left.Type, right.Type });
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parents:
diff changeset
1968 }
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parents:
diff changeset
1969
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parents:
diff changeset
1970 Expression GenerateStaticMethodCall(string methodName, Expression left, Expression right)
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parents:
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1971 {
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diff changeset
1972 return Expression.Call(null, GetStaticMethod(methodName, left, right), new[] { left, right });
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parents:
diff changeset
1973 }
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parents:
diff changeset
1974
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parents:
diff changeset
1975 void SetTextPos(int pos)
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parents:
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1976 {
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diff changeset
1977 textPos = pos;
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parents:
diff changeset
1978 ch = textPos < textLen ? text[textPos] : '\0';
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parents:
diff changeset
1979 }
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parents:
diff changeset
1980
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parents:
diff changeset
1981 void NextChar()
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parents:
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1982 {
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parents:
diff changeset
1983 if (textPos < textLen) textPos++;
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parents:
diff changeset
1984 ch = textPos < textLen ? text[textPos] : '\0';
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parents:
diff changeset
1985 }
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parents:
diff changeset
1986
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parents:
diff changeset
1987 void NextToken()
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parents:
diff changeset
1988 {
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parents:
diff changeset
1989 while (Char.IsWhiteSpace(ch)) NextChar();
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parents:
diff changeset
1990 TokenId t;
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parents:
diff changeset
1991 int tokenPos = textPos;
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parents:
diff changeset
1992 switch (ch)
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parents:
diff changeset
1993 {
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parents:
diff changeset
1994 case '!':
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parents:
diff changeset
1995 NextChar();
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parents:
diff changeset
1996 if (ch == '=')
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parents:
diff changeset
1997 {
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parents:
diff changeset
1998 NextChar();
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parents:
diff changeset
1999 t = TokenId.ExclamationEqual;
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parents:
diff changeset
2000 }
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parents:
diff changeset
2001 else
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parents:
diff changeset
2002 {
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parents:
diff changeset
2003 t = TokenId.Exclamation;
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parents:
diff changeset
2004 }
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parents:
diff changeset
2005 break;
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parents:
diff changeset
2006 case '%':
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parents:
diff changeset
2007 NextChar();
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parents:
diff changeset
2008 t = TokenId.Percent;
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parents:
diff changeset
2009 break;
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parents:
diff changeset
2010 case '&':
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parents:
diff changeset
2011 NextChar();
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parents:
diff changeset
2012 if (ch == '&')
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parents:
diff changeset
2013 {
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parents:
diff changeset
2014 NextChar();
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parents:
diff changeset
2015 t = TokenId.DoubleAmphersand;
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parents:
diff changeset
2016 }
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parents:
diff changeset
2017 else
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parents:
diff changeset
2018 {
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parents:
diff changeset
2019 t = TokenId.Amphersand;
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parents:
diff changeset
2020 }
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parents:
diff changeset
2021 break;
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parents:
diff changeset
2022 case '(':
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parents:
diff changeset
2023 NextChar();
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parents:
diff changeset
2024 t = TokenId.OpenParen;
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parents:
diff changeset
2025 break;
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parents:
diff changeset
2026 case ')':
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parents:
diff changeset
2027 NextChar();
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parents:
diff changeset
2028 t = TokenId.CloseParen;
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parents:
diff changeset
2029 break;
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parents:
diff changeset
2030 case '*':
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parents:
diff changeset
2031 NextChar();
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parents:
diff changeset
2032 t = TokenId.Asterisk;
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parents:
diff changeset
2033 break;
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parents:
diff changeset
2034 case '+':
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parents:
diff changeset
2035 NextChar();
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parents:
diff changeset
2036 t = TokenId.Plus;
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parents:
diff changeset
2037 break;
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parents:
diff changeset
2038 case ',':
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parents:
diff changeset
2039 NextChar();
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parents:
diff changeset
2040 t = TokenId.Comma;
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parents:
diff changeset
2041 break;
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parents:
diff changeset
2042 case '-':
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parents:
diff changeset
2043 NextChar();
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parents:
diff changeset
2044 t = TokenId.Minus;
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parents:
diff changeset
2045 break;
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parents:
diff changeset
2046 case '.':
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parents:
diff changeset
2047 NextChar();
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parents:
diff changeset
2048 t = TokenId.Dot;
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parents:
diff changeset
2049 break;
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parents:
diff changeset
2050 case '/':
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parents:
diff changeset
2051 NextChar();
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parents:
diff changeset
2052 t = TokenId.Slash;
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parents:
diff changeset
2053 break;
060f02cd4591 Initial commit, pre airport work
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parents:
diff changeset
2054 case ':':
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parents:
diff changeset
2055 NextChar();
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parents:
diff changeset
2056 t = TokenId.Colon;
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parents:
diff changeset
2057 break;
060f02cd4591 Initial commit, pre airport work
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parents:
diff changeset
2058 case '<':
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parents:
diff changeset
2059 NextChar();
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parents:
diff changeset
2060 if (ch == '=')
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parents:
diff changeset
2061 {
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parents:
diff changeset
2062 NextChar();
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parents:
diff changeset
2063 t = TokenId.LessThanEqual;
060f02cd4591 Initial commit, pre airport work
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parents:
diff changeset
2064 }
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parents:
diff changeset
2065 else if (ch == '>')
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parents:
diff changeset
2066 {
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parents:
diff changeset
2067 NextChar();
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parents:
diff changeset
2068 t = TokenId.LessGreater;
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parents:
diff changeset
2069 }
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parents:
diff changeset
2070 else
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parents:
diff changeset
2071 {
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parents:
diff changeset
2072 t = TokenId.LessThan;
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parents:
diff changeset
2073 }
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parents:
diff changeset
2074 break;
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parents:
diff changeset
2075 case '=':
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parents:
diff changeset
2076 NextChar();
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parents:
diff changeset
2077 if (ch == '=')
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parents:
diff changeset
2078 {
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parents:
diff changeset
2079 NextChar();
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parents:
diff changeset
2080 t = TokenId.DoubleEqual;
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parents:
diff changeset
2081 }
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parents:
diff changeset
2082 else
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parents:
diff changeset
2083 {
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parents:
diff changeset
2084 t = TokenId.Equal;
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parents:
diff changeset
2085 }
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parents:
diff changeset
2086 break;
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parents:
diff changeset
2087 case '>':
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parents:
diff changeset
2088 NextChar();
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parents:
diff changeset
2089 if (ch == '=')
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parents:
diff changeset
2090 {
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parents:
diff changeset
2091 NextChar();
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parents:
diff changeset
2092 t = TokenId.GreaterThanEqual;
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parents:
diff changeset
2093 }
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parents:
diff changeset
2094 else
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parents:
diff changeset
2095 {
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parents:
diff changeset
2096 t = TokenId.GreaterThan;
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parents:
diff changeset
2097 }
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parents:
diff changeset
2098 break;
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parents:
diff changeset
2099 case '?':
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parents:
diff changeset
2100 NextChar();
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parents:
diff changeset
2101 t = TokenId.Question;
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parents:
diff changeset
2102 break;
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parents:
diff changeset
2103 case '[':
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parents:
diff changeset
2104 NextChar();
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parents:
diff changeset
2105 t = TokenId.OpenBracket;
060f02cd4591 Initial commit, pre airport work
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parents:
diff changeset
2106 break;
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parents:
diff changeset
2107 case ']':
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parents:
diff changeset
2108 NextChar();
060f02cd4591 Initial commit, pre airport work
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parents:
diff changeset
2109 t = TokenId.CloseBracket;
060f02cd4591 Initial commit, pre airport work
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parents:
diff changeset
2110 break;
060f02cd4591 Initial commit, pre airport work
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parents:
diff changeset
2111 case '|':
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parents:
diff changeset
2112 NextChar();
060f02cd4591 Initial commit, pre airport work
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parents:
diff changeset
2113 if (ch == '|')
060f02cd4591 Initial commit, pre airport work
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parents:
diff changeset
2114 {
060f02cd4591 Initial commit, pre airport work
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parents:
diff changeset
2115 NextChar();
060f02cd4591 Initial commit, pre airport work
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parents:
diff changeset
2116 t = TokenId.DoubleBar;
060f02cd4591 Initial commit, pre airport work
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parents:
diff changeset
2117 }
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parents:
diff changeset
2118 else
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parents:
diff changeset
2119 {
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diff changeset
2120 t = TokenId.Bar;
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parents:
diff changeset
2121 }
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2122 break;
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parents:
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2123 case '"':
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diff changeset
2124 case '\'':
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2125 char quote = ch;
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2126 do
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parents:
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2127 {
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diff changeset
2128 NextChar();
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diff changeset
2129 while (textPos < textLen && ch != quote) NextChar();
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parents:
diff changeset
2130 if (textPos == textLen)
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2131 throw ParseError(textPos, Res.UnterminatedStringLiteral);
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2132 NextChar();
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diff changeset
2133 } while (ch == quote);
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2134 t = TokenId.StringLiteral;
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2135 break;
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diff changeset
2136 default:
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diff changeset
2137 if (Char.IsLetter(ch) || ch == '@' || ch == '_')
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parents:
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2138 {
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parents:
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2139 do
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parents:
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2140 {
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2141 NextChar();
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2142 } while (Char.IsLetterOrDigit(ch) || ch == '_');
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2143 t = TokenId.Identifier;
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2144 break;
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2145 }
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2146 if (Char.IsDigit(ch))
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2147 {
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2148 t = TokenId.IntegerLiteral;
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2149 do
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parents:
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2150 {
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diff changeset
2151 NextChar();
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2152 } while (Char.IsDigit(ch));
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2153 if (ch == '.')
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2154 {
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2155 t = TokenId.RealLiteral;
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2156 NextChar();
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2157 ValidateDigit();
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2158 do
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parents:
diff changeset
2159 {
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diff changeset
2160 NextChar();
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2161 } while (Char.IsDigit(ch));
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2162 }
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diff changeset
2163 if (ch == 'E' || ch == 'e')
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2164 {
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2165 t = TokenId.RealLiteral;
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2166 NextChar();
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diff changeset
2167 if (ch == '+' || ch == '-') NextChar();
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parents:
diff changeset
2168 ValidateDigit();
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2169 do
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parents:
diff changeset
2170 {
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diff changeset
2171 NextChar();
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parents:
diff changeset
2172 } while (Char.IsDigit(ch));
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2173 }
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diff changeset
2174 if (ch == 'F' || ch == 'f') NextChar();
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2175 break;
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2176 }
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diff changeset
2177 if (textPos == textLen)
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2178 {
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diff changeset
2179 t = TokenId.End;
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2180 break;
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diff changeset
2181 }
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2182 throw ParseError(textPos, Res.InvalidCharacter, ch);
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2183 }
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parents:
diff changeset
2184 token.id = t;
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diff changeset
2185 token.text = text.Substring(tokenPos, textPos - tokenPos);
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2186 token.pos = tokenPos;
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diff changeset
2187 }
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parents:
diff changeset
2188
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diff changeset
2189 bool TokenIdentifierIs(string id)
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2190 {
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diff changeset
2191 return token.id == TokenId.Identifier && String.Equals(id, token.text, StringComparison.OrdinalIgnoreCase);
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diff changeset
2192 }
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parents:
diff changeset
2193
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diff changeset
2194 string GetIdentifier()
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parents:
diff changeset
2195 {
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diff changeset
2196 ValidateToken(TokenId.Identifier, Res.IdentifierExpected);
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2197 string id = token.text;
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2198 if (id.Length > 1 && id[0] == '@') id = id.Substring(1);
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diff changeset
2199 return id;
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diff changeset
2200 }
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diff changeset
2201
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2202 void ValidateDigit()
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2203 {
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2204 if (!Char.IsDigit(ch)) throw ParseError(textPos, Res.DigitExpected);
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diff changeset
2205 }
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diff changeset
2206
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diff changeset
2207 void ValidateToken(TokenId t, string errorMessage)
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2208 {
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2209 if (token.id != t) throw ParseError(errorMessage);
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2210 }
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diff changeset
2211
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2212 void ValidateToken(TokenId t)
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2213 {
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2214 if (token.id != t) throw ParseError(Res.SyntaxError);
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diff changeset
2215 }
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diff changeset
2216
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2217 Exception ParseError(string format, params object[] args)
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diff changeset
2218 {
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2219 return ParseError(token.pos, format, args);
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diff changeset
2220 }
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2221
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2222 Exception ParseError(int pos, string format, params object[] args)
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2223 {
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2224 return new ParseException(string.Format(System.Globalization.CultureInfo.CurrentCulture, format, args), pos);
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diff changeset
2225 }
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diff changeset
2226
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diff changeset
2227 static Dictionary<string, object> CreateKeywords()
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2228 {
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2229 Dictionary<string, object> d = new Dictionary<string, object>(StringComparer.OrdinalIgnoreCase);
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2230 d.Add("true", trueLiteral);
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diff changeset
2231 d.Add("false", falseLiteral);
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diff changeset
2232 d.Add("null", nullLiteral);
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2233 d.Add(keywordIt, keywordIt);
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2234 d.Add(keywordIif, keywordIif);
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2235 d.Add(keywordNew, keywordNew);
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2236 foreach (Type type in predefinedTypes) d.Add(type.Name, type);
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2237 return d;
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diff changeset
2238 }
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diff changeset
2239 }
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diff changeset
2240
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2241 static class Res
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2242 {
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2243 public const string DuplicateIdentifier = "The identifier '{0}' was defined more than once";
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2244 public const string ExpressionTypeMismatch = "Expression of type '{0}' expected";
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2245 public const string ExpressionExpected = "Expression expected";
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2246 public const string InvalidCharacterLiteral = "Character literal must contain exactly one character";
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2247 public const string InvalidIntegerLiteral = "Invalid integer literal '{0}'";
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2248 public const string InvalidRealLiteral = "Invalid real literal '{0}'";
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2249 public const string UnknownIdentifier = "Unknown identifier '{0}'";
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2250 public const string NoItInScope = "No 'it' is in scope";
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2251 public const string IifRequiresThreeArgs = "The 'iif' function requires three arguments";
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2252 public const string FirstExprMustBeBool = "The first expression must be of type 'Boolean'";
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2253 public const string BothTypesConvertToOther = "Both of the types '{0}' and '{1}' convert to the other";
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2254 public const string NeitherTypeConvertsToOther = "Neither of the types '{0}' and '{1}' converts to the other";
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diff changeset
2255 public const string MissingAsClause = "Expression is missing an 'as' clause";
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2256 public const string ArgsIncompatibleWithLambda = "Argument list incompatible with lambda expression";
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2257 public const string TypeHasNoNullableForm = "Type '{0}' has no nullable form";
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2258 public const string NoMatchingConstructor = "No matching constructor in type '{0}'";
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2259 public const string AmbiguousConstructorInvocation = "Ambiguous invocation of '{0}' constructor";
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2260 public const string CannotConvertValue = "A value of type '{0}' cannot be converted to type '{1}'";
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2261 public const string NoApplicableMethod = "No applicable method '{0}' exists in type '{1}'";
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2262 public const string MethodsAreInaccessible = "Methods on type '{0}' are not accessible";
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2263 public const string MethodIsVoid = "Method '{0}' in type '{1}' does not return a value";
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2264 public const string AmbiguousMethodInvocation = "Ambiguous invocation of method '{0}' in type '{1}'";
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2265 public const string UnknownPropertyOrField = "No property or field '{0}' exists in type '{1}'";
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2266 public const string NoApplicableAggregate = "No applicable aggregate method '{0}' exists";
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2267 public const string CannotIndexMultiDimArray = "Indexing of multi-dimensional arrays is not supported";
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2268 public const string InvalidIndex = "Array index must be an integer expression";
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2269 public const string NoApplicableIndexer = "No applicable indexer exists in type '{0}'";
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2270 public const string AmbiguousIndexerInvocation = "Ambiguous invocation of indexer in type '{0}'";
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2271 public const string IncompatibleOperand = "Operator '{0}' incompatible with operand type '{1}'";
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diff changeset
2272 public const string IncompatibleOperands = "Operator '{0}' incompatible with operand types '{1}' and '{2}'";
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2273 public const string UnterminatedStringLiteral = "Unterminated string literal";
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2274 public const string InvalidCharacter = "Syntax error '{0}'";
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2275 public const string DigitExpected = "Digit expected";
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2276 public const string SyntaxError = "Syntax error";
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2277 public const string TokenExpected = "{0} expected";
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2278 public const string ParseExceptionFormat = "{0} (at index {1})";
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2279 public const string ColonExpected = "':' expected";
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2280 public const string OpenParenExpected = "'(' expected";
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2281 public const string CloseParenOrOperatorExpected = "')' or operator expected";
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2282 public const string CloseParenOrCommaExpected = "')' or ',' expected";
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2283 public const string DotOrOpenParenExpected = "'.' or '(' expected";
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2284 public const string OpenBracketExpected = "'[' expected";
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2285 public const string CloseBracketOrCommaExpected = "']' or ',' expected";
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2286 public const string IdentifierExpected = "Identifier expected";
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2287 }
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2288 }