Mercurial > lcfOS
annotate python/c3/astnodes.py @ 222:c3f1ce8b638f
Fixup of parser
| author | Windel Bouwman |
|---|---|
| date | Tue, 09 Jul 2013 17:36:31 +0200 |
| parents | 848c4b15fd0b |
| children | 1c7364bd74c7 |
| rev | line source |
|---|---|
| 148 | 1 """ |
| 213 | 2 AST (abstract syntax tree) nodes for the c3 language. |
| 3 The tree is build by the parser. | |
| 4 Then it is checked | |
| 5 Finally code is generated from it. | |
| 148 | 6 """ |
| 7 | |
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8 from ppci import SourceLocation |
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9 |
| 148 | 10 class Node: |
| 163 | 11 pass |
| 148 | 12 |
| 213 | 13 # Modules |
| 14 class Package(Node): | |
| 15 def __init__(self, name, loc): | |
| 16 self.name = name | |
| 17 self.loc = loc | |
| 18 self.declarations = [] | |
| 19 def __repr__(self): | |
| 20 return 'PACKAGE {}'.format(self.name) | |
| 21 | |
| 150 | 22 class Designator(Node): |
| 213 | 23 def __init__(self, tname, loc): |
| 24 self.tname = tname | |
| 25 self.loc = loc | |
| 26 def __repr__(self): | |
| 27 return 'DESIGNATOR {}'.format(self.tname) | |
| 148 | 28 |
| 29 """ | |
| 30 Type classes | |
| 213 | 31 |
| 32 types must be comparable. | |
| 33 | |
| 34 There are the following types: | |
| 35 - base type | |
| 36 - struct type | |
| 37 - pointer type | |
| 38 - typedef type | |
| 39 - function type | |
| 148 | 40 """ |
| 41 | |
| 149 | 42 class Type(Node): |
| 148 | 43 def isType(self, b): |
| 44 return isType(self, b) | |
| 45 | |
| 46 class BaseType(Type): | |
| 47 def __init__(self, name): | |
| 48 self.name = name | |
| 49 def __repr__(self): | |
| 212 | 50 return '{}'.format(self.name) |
| 148 | 51 |
| 52 class FunctionType(Type): | |
| 167 | 53 def __init__(self, parametertypes, returntype): |
| 54 self.parametertypes = parametertypes | |
| 148 | 55 self.returntype = returntype |
| 56 def __repr__(self): | |
| 167 | 57 params = ', '.join([str(v) for v in self.parametertypes]) |
| 165 | 58 return '{1} f({0})'.format(params, self.returntype) |
| 148 | 59 |
| 213 | 60 class PointerType(Type): |
| 61 def __init__(self, ptype): | |
| 62 self.ptype = ptype | |
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63 def __repr__(self): |
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64 return '({}*)'.format(self.ptype) |
| 213 | 65 |
| 66 class StructureType(Type): | |
| 67 def __init__(self, mems): | |
| 68 self.mems = mems | |
| 69 | |
| 148 | 70 class DefinedType(Type): |
| 71 def __init__(self, name, typ): | |
| 72 self.name = name | |
| 73 self.typ = typ | |
| 74 def __repr__(self): | |
| 75 return 'Named type {0} of type {1}'.format(self.name, self.typ) | |
| 76 | |
| 222 | 77 class TypeCast(Node): |
| 78 def __init__(self, to_type, x): | |
| 79 self.to_type = to_type | |
| 80 self.a = x | |
| 81 def __repr__(self): | |
| 82 return 'TYPECAST' | |
| 221 | 83 |
| 148 | 84 # Variables, parameters, local variables, constants: |
| 85 class Symbol(Node): | |
| 213 | 86 def __init__(self, name): |
| 163 | 87 self.name = name |
| 88 self.refs = [] | |
| 213 | 89 def addRef(self, r): |
| 163 | 90 self.refs.append(r) |
| 213 | 91 @property |
| 92 def References(self): | |
| 163 | 93 return self.refs |
| 148 | 94 |
| 95 class Constant(Symbol): | |
| 213 | 96 def __init__(self, name, typ, value): |
| 163 | 97 super().__init__(name) |
| 98 self.typ = typ | |
| 148 | 99 self.value = value |
| 213 | 100 def __repr__(self): |
| 148 | 101 return 'CONSTANT {0} = {1}'.format(self.name, self.value) |
| 102 | |
| 103 class Variable(Symbol): | |
| 213 | 104 def __init__(self, name, typ): |
| 163 | 105 super().__init__(name) |
| 148 | 106 self.typ = typ |
| 213 | 107 self.ival = None |
| 148 | 108 self.isLocal = False |
| 109 self.isReadOnly = False | |
| 110 self.isParameter = False | |
| 111 def __repr__(self): | |
| 217 | 112 return 'Var {}'.format(self.name) |
| 148 | 113 |
| 150 | 114 # Procedure types |
| 115 class Function(Symbol): | |
| 213 | 116 """ Actual implementation of a function """ |
| 117 def __init__(self, name, loc): | |
| 118 super().__init__(name) | |
| 119 self.loc = loc | |
| 215 | 120 self.declarations = [] |
| 213 | 121 |
| 122 def __repr__(self): | |
| 217 | 123 return 'Func {}'.format(self.name) |
| 148 | 124 |
| 163 | 125 # Operations / Expressions: |
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126 class Expression(Node): |
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127 pass |
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128 |
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129 class Unop(Expression): |
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130 def __init__(self, op, a, loc): |
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131 assert isinstance(a, Expression) |
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132 assert isinstance(op, str) |
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133 self.a = a |
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134 self.op = op |
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135 self.loc = loc |
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136 def __repr__(self): |
| 212 | 137 return 'UNOP {}'.format(self.op) |
| 148 | 138 |
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139 class Binop(Expression): |
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140 def __init__(self, a, op, b, loc): |
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141 assert isinstance(a, Expression), type(a) |
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142 assert isinstance(b, Expression) |
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143 assert isinstance(op, str) |
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144 self.a = a |
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145 self.b = b |
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146 self.op = op # Operation: '+', '-', '*', '/', 'mod' |
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147 self.loc = loc |
| 148 | 148 |
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149 def __repr__(self): |
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150 return 'BINOP {}'.format(self.op) |
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151 |
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152 class VariableUse(Expression): |
| 213 | 153 def __init__(self, target, loc): |
| 150 | 154 self.target = target |
| 213 | 155 self.loc = loc |
| 150 | 156 def __repr__(self): |
| 163 | 157 nm = self.target.name if hasattr(self.target, 'name') else '' |
| 212 | 158 return 'VAR USE {}'.format(nm) |
| 163 | 159 |
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160 class Literal(Expression): |
| 213 | 161 def __init__(self, val, loc): |
| 163 | 162 self.val = val |
| 213 | 163 self.loc = loc |
| 163 | 164 def __repr__(self): |
| 212 | 165 return 'LITERAL {}'.format(self.val) |
| 150 | 166 |
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167 class FunctionCall(Expression): |
| 213 | 168 def __init__(self, proc, args, loc): |
| 148 | 169 self.proc = proc |
| 170 self.args = args | |
| 213 | 171 self.loc = loc |
| 148 | 172 def __repr__(self): |
| 173 return 'CALL {0} '.format(self.proc) | |
| 174 | |
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175 # Statements |
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176 class Statement(Node): |
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177 pass |
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178 |
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179 class CompoundStatement(Statement): |
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180 def __init__(self, statements): |
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181 self.statements = statements |
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182 |
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183 def __repr__(self): |
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184 return 'COMPOUND STATEMENT' |
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185 |
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186 class EmptyStatement(Statement): |
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187 def __repr__(self): |
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188 return 'NOP' |
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189 |
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190 class ReturnStatement(Statement): |
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191 def __init__(self, expr, loc): |
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192 self.expr = expr |
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193 self.loc = loc |
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194 def __repr__(self): |
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195 return 'RETURN STATEMENT' |
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196 |
| 222 | 197 class Assignment(Statement): |
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198 def __init__(self, lval, rval, loc): |
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199 assert isinstance(lval, Node) |
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200 assert isinstance(rval, Node) |
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201 assert isinstance(loc, SourceLocation) |
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202 self.lval = lval |
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203 self.rval = rval |
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204 self.loc = loc |
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205 |
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206 def __repr__(self): |
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207 return 'ASSIGNMENT' |
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208 |
| 222 | 209 class ExpressionStatement(Statement): |
| 210 def __init__(self, ex, loc): | |
| 211 self.ex = ex | |
| 212 self.loc = loc | |
| 213 assert isinstance(loc, SourceLocation) | |
| 214 def __repr__(self): | |
| 215 return 'Epression' | |
| 216 | |
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217 class IfStatement(Statement): |
| 213 | 218 def __init__(self, condition, truestatement, falsestatement, loc): |
| 148 | 219 self.condition = condition |
| 220 self.truestatement = truestatement | |
| 221 self.falsestatement = falsestatement | |
| 213 | 222 self.loc = loc |
| 148 | 223 def __repr__(self): |
| 224 return 'IF-statement' | |
| 225 | |
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226 class WhileStatement(Statement): |
| 213 | 227 def __init__(self, condition, statement, loc): |
| 148 | 228 self.condition = condition |
| 213 | 229 self.statement = statement |
| 230 self.loc = loc | |
| 148 | 231 def __repr__(self): |
| 232 return 'WHILE-statement' | |
| 233 |