Mercurial > lcfOS
annotate python/c3/astnodes.py @ 221:848c4b15fd0b
pointers
| author | Windel Bouwman |
|---|---|
| date | Mon, 08 Jul 2013 22:21:44 +0200 |
| parents | 3f6c30a5d234 |
| children | c3f1ce8b638f |
| 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 | |
| 221 | 77 #class TypeCast(Node): |
| 78 # def __init__(self, | |
| 79 | |
| 148 | 80 # Variables, parameters, local variables, constants: |
| 81 class Symbol(Node): | |
| 213 | 82 def __init__(self, name): |
| 163 | 83 self.name = name |
| 84 self.refs = [] | |
| 213 | 85 def addRef(self, r): |
| 163 | 86 self.refs.append(r) |
| 213 | 87 @property |
| 88 def References(self): | |
| 163 | 89 return self.refs |
| 148 | 90 |
| 91 class Constant(Symbol): | |
| 213 | 92 def __init__(self, name, typ, value): |
| 163 | 93 super().__init__(name) |
| 94 self.typ = typ | |
| 148 | 95 self.value = value |
| 213 | 96 def __repr__(self): |
| 148 | 97 return 'CONSTANT {0} = {1}'.format(self.name, self.value) |
| 98 | |
| 99 class Variable(Symbol): | |
| 213 | 100 def __init__(self, name, typ): |
| 163 | 101 super().__init__(name) |
| 148 | 102 self.typ = typ |
| 213 | 103 self.ival = None |
| 148 | 104 self.isLocal = False |
| 105 self.isReadOnly = False | |
| 106 self.isParameter = False | |
| 107 def __repr__(self): | |
| 217 | 108 return 'Var {}'.format(self.name) |
| 148 | 109 |
| 150 | 110 # Procedure types |
| 111 class Function(Symbol): | |
| 213 | 112 """ Actual implementation of a function """ |
| 113 def __init__(self, name, loc): | |
| 114 super().__init__(name) | |
| 115 self.loc = loc | |
| 215 | 116 self.declarations = [] |
| 213 | 117 |
| 118 def __repr__(self): | |
| 217 | 119 return 'Func {}'.format(self.name) |
| 148 | 120 |
| 163 | 121 # Operations / Expressions: |
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122 class Expression(Node): |
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123 pass |
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124 |
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125 class Unop(Expression): |
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126 def __init__(self, op, a, loc): |
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127 assert isinstance(a, Expression) |
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128 assert isinstance(op, str) |
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129 self.a = a |
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130 self.op = op |
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131 self.loc = loc |
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132 def __repr__(self): |
| 212 | 133 return 'UNOP {}'.format(self.op) |
| 148 | 134 |
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135 class Binop(Expression): |
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136 def __init__(self, a, op, b, loc): |
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137 assert isinstance(a, Expression), type(a) |
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138 assert isinstance(b, Expression) |
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139 assert isinstance(op, str) |
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140 self.a = a |
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141 self.b = b |
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142 self.op = op # Operation: '+', '-', '*', '/', 'mod' |
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143 self.loc = loc |
| 148 | 144 |
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145 def __repr__(self): |
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146 return 'BINOP {}'.format(self.op) |
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147 |
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148 class VariableUse(Expression): |
| 213 | 149 def __init__(self, target, loc): |
| 150 | 150 self.target = target |
| 213 | 151 self.loc = loc |
| 150 | 152 def __repr__(self): |
| 163 | 153 nm = self.target.name if hasattr(self.target, 'name') else '' |
| 212 | 154 return 'VAR USE {}'.format(nm) |
| 163 | 155 |
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156 class Literal(Expression): |
| 213 | 157 def __init__(self, val, loc): |
| 163 | 158 self.val = val |
| 213 | 159 self.loc = loc |
| 163 | 160 def __repr__(self): |
| 212 | 161 return 'LITERAL {}'.format(self.val) |
| 150 | 162 |
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163 class FunctionCall(Expression): |
| 213 | 164 def __init__(self, proc, args, loc): |
| 148 | 165 self.proc = proc |
| 166 self.args = args | |
| 213 | 167 self.loc = loc |
| 148 | 168 def __repr__(self): |
| 169 return 'CALL {0} '.format(self.proc) | |
| 170 | |
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171 # Statements |
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172 class Statement(Node): |
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173 pass |
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174 |
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175 class CompoundStatement(Statement): |
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176 def __init__(self, statements): |
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177 self.statements = statements |
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178 |
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179 def __repr__(self): |
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180 return 'COMPOUND STATEMENT' |
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181 |
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182 class EmptyStatement(Statement): |
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183 def __repr__(self): |
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184 return 'NOP' |
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185 |
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186 class ReturnStatement(Statement): |
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187 def __init__(self, expr, loc): |
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188 self.expr = expr |
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189 self.loc = loc |
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190 def __repr__(self): |
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191 return 'RETURN STATEMENT' |
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192 |
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193 class Assignment(Node): |
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194 def __init__(self, lval, rval, loc): |
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195 assert isinstance(lval, Node) |
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196 assert isinstance(rval, Node) |
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197 assert isinstance(loc, SourceLocation) |
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198 self.lval = lval |
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199 self.rval = rval |
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200 self.loc = loc |
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201 |
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202 def __repr__(self): |
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203 return 'ASSIGNMENT' |
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204 |
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205 class IfStatement(Statement): |
| 213 | 206 def __init__(self, condition, truestatement, falsestatement, loc): |
| 148 | 207 self.condition = condition |
| 208 self.truestatement = truestatement | |
| 209 self.falsestatement = falsestatement | |
| 213 | 210 self.loc = loc |
| 148 | 211 def __repr__(self): |
| 212 return 'IF-statement' | |
| 213 | |
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214 class WhileStatement(Statement): |
| 213 | 215 def __init__(self, condition, statement, loc): |
| 148 | 216 self.condition = condition |
| 213 | 217 self.statement = statement |
| 218 self.loc = loc | |
| 148 | 219 def __repr__(self): |
| 220 return 'WHILE-statement' | |
| 221 |