Mercurial > lcfOS
annotate python/ppci/c3/astnodes.py @ 389:2ec730e45ea1
Added check for recursive struct
| author | Windel Bouwman |
|---|---|
| date | Fri, 16 May 2014 12:29:31 +0200 |
| parents | 5477e499b039 |
| children | 6ae782a085e0 |
| 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 | |
| 288 | 8 |
| 148 | 9 class Node: |
| 306 | 10 """ Base class of all nodes in a AST """ |
| 288 | 11 pass |
| 12 | |
| 148 | 13 |
| 300 | 14 # Variables, parameters, local variables, constants and named types: |
| 15 class Symbol(Node): | |
| 308 | 16 """ Symbol is the base class for all named things like variables, |
| 306 | 17 functions, constants and types and modules """ |
| 300 | 18 def __init__(self, name): |
| 19 self.name = name | |
| 20 self.refs = [] | |
| 21 | |
| 22 def addRef(self, r): | |
| 23 self.refs.append(r) | |
| 24 | |
| 25 @property | |
| 26 def References(self): | |
| 27 return self.refs | |
| 28 | |
| 29 | |
| 213 | 30 # Modules |
| 301 | 31 class Package(Symbol): |
| 213 | 32 def __init__(self, name, loc): |
| 301 | 33 super().__init__(name) |
| 213 | 34 self.loc = loc |
| 35 self.declarations = [] | |
|
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36 self.imports = [] |
| 288 | 37 |
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38 def add_declaration(self, decl): |
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39 self.declarations.append(decl) |
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40 if isinstance(decl, Function): |
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41 decl.package = self |
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42 |
| 389 | 43 @property |
| 44 def Types(self): | |
| 45 return self.innerScope.Types | |
| 46 | |
| 213 | 47 def __repr__(self): |
| 284 | 48 return 'MODULE {}'.format(self.name) |
| 49 | |
| 213 | 50 |
| 149 | 51 class Type(Node): |
| 306 | 52 """ Base class of all types """ |
| 288 | 53 pass |
| 272 | 54 |
| 148 | 55 |
| 300 | 56 class NamedType(Type, Symbol): |
| 308 | 57 """ Some types are named, for example a user defined type (typedef) |
| 306 | 58 and built in types. That is why this class derives from both Type |
| 59 and Symbol. """ | |
| 272 | 60 def __init__(self, name): |
| 300 | 61 Symbol.__init__(self, name) |
| 62 | |
| 63 | |
| 64 class BaseType(NamedType): | |
| 306 | 65 """ Built in type """ |
| 300 | 66 def __init__(self, name): |
| 67 super().__init__(name) | |
| 272 | 68 |
| 69 def __repr__(self): | |
| 70 return '{}'.format(self.name) | |
| 71 | |
| 148 | 72 |
| 73 class FunctionType(Type): | |
| 306 | 74 """ Function blueprint, defines argument types and return type """ |
| 288 | 75 def __init__(self, parametertypes, returntype): |
| 76 self.parametertypes = parametertypes | |
| 77 self.returntype = returntype | |
| 78 | |
| 79 def __repr__(self): | |
| 80 params = ', '.join([str(v) for v in self.parametertypes]) | |
| 81 return '{1} f({0})'.format(params, self.returntype) | |
| 148 | 82 |
| 272 | 83 |
| 213 | 84 class PointerType(Type): |
| 288 | 85 """ A type that points to data of some other type """ |
| 213 | 86 def __init__(self, ptype): |
| 306 | 87 assert isinstance(ptype, Type) or isinstance(ptype, Expression) |
| 213 | 88 self.ptype = ptype |
| 288 | 89 |
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90 def __repr__(self): |
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91 return '({}*)'.format(self.ptype) |
| 213 | 92 |
| 230 | 93 |
| 227 | 94 class StructField: |
| 316 | 95 """ Field of a struct type """ |
| 227 | 96 def __init__(self, name, typ): |
| 306 | 97 assert type(name) is str |
| 227 | 98 self.name = name |
| 99 self.typ = typ | |
| 230 | 100 |
| 389 | 101 def __repr__(self): |
| 102 return 'Member {}'.format(self.name) | |
| 103 | |
| 227 | 104 |
| 213 | 105 class StructureType(Type): |
| 306 | 106 """ Struct type consisting of several named members """ |
| 213 | 107 def __init__(self, mems): |
| 108 self.mems = mems | |
| 306 | 109 assert all(type(mem) is StructField for mem in mems) |
| 230 | 110 |
| 225 | 111 def hasField(self, name): |
| 227 | 112 for mem in self.mems: |
| 113 if name == mem.name: | |
| 225 | 114 return True |
| 115 return False | |
| 230 | 116 |
| 225 | 117 def fieldType(self, name): |
| 230 | 118 return self.findField(name).typ |
| 119 | |
| 120 def fieldOffset(self, name): | |
| 121 return self.findField(name).offset | |
| 122 | |
| 123 def findField(self, name): | |
| 227 | 124 for mem in self.mems: |
| 125 if name == mem.name: | |
| 230 | 126 return mem |
| 127 raise KeyError(name) | |
| 225 | 128 |
| 230 | 129 def __repr__(self): |
| 130 return 'STRUCT' | |
| 213 | 131 |
| 272 | 132 |
| 354 | 133 class ArrayType(Type): |
| 134 """ Array type """ | |
| 135 def __init__(self, element_type, size): | |
| 136 self.element_type = element_type | |
| 137 self.size = size | |
| 138 | |
| 139 def __repr__(self): | |
| 140 return 'ARRAY {}'.format(self.size) | |
| 141 | |
| 142 | |
| 300 | 143 class DefinedType(NamedType): |
| 288 | 144 """ A named type indicating another type """ |
| 225 | 145 def __init__(self, name, typ, loc): |
| 146 assert isinstance(name, str) | |
| 300 | 147 super().__init__(name) |
| 225 | 148 self.typ = typ |
| 149 self.loc = loc | |
| 230 | 150 |
| 225 | 151 def __repr__(self): |
| 152 return 'Named type {0} of type {1}'.format(self.name, self.typ) | |
| 148 | 153 |
| 221 | 154 |
| 148 | 155 class Constant(Symbol): |
| 316 | 156 """ Constant definition """ |
| 213 | 157 def __init__(self, name, typ, value): |
| 272 | 158 super().__init__(name) |
| 159 self.typ = typ | |
| 160 self.value = value | |
| 161 | |
| 213 | 162 def __repr__(self): |
| 272 | 163 return 'CONSTANT {0} = {1}'.format(self.name, self.value) |
| 164 | |
| 148 | 165 |
| 166 class Variable(Symbol): | |
| 272 | 167 def __init__(self, name, typ): |
| 168 super().__init__(name) | |
| 169 self.typ = typ | |
| 170 self.isLocal = False | |
| 171 self.isParameter = False | |
| 172 | |
| 173 def __repr__(self): | |
| 174 return 'Var {} [{}]'.format(self.name, self.typ) | |
| 175 | |
| 176 | |
| 177 class LocalVariable(Variable): | |
| 178 def __init__(self, name, typ): | |
| 179 super().__init__(name, typ) | |
| 180 self.isLocal = True | |
| 181 | |
| 182 | |
| 183 class FormalParameter(Variable): | |
| 184 def __init__(self, name, typ): | |
| 185 super().__init__(name, typ) | |
| 186 self.isParameter = True | |
| 187 | |
| 148 | 188 |
| 150 | 189 # Procedure types |
| 190 class Function(Symbol): | |
| 213 | 191 """ Actual implementation of a function """ |
| 192 def __init__(self, name, loc): | |
| 193 super().__init__(name) | |
| 194 self.loc = loc | |
| 215 | 195 self.declarations = [] |
| 213 | 196 |
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197 def add_declaration(self, decl): |
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198 self.declarations.append(decl) |
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199 |
| 213 | 200 def __repr__(self): |
| 217 | 201 return 'Func {}'.format(self.name) |
| 148 | 202 |
| 288 | 203 |
| 163 | 204 # Operations / Expressions: |
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205 class Expression(Node): |
| 230 | 206 def __init__(self, loc): |
| 207 self.loc = loc | |
| 208 | |
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209 |
| 225 | 210 class Deref(Expression): |
| 211 def __init__(self, ptr, loc): | |
| 230 | 212 super().__init__(loc) |
| 225 | 213 assert isinstance(ptr, Expression) |
| 214 self.ptr = ptr | |
| 288 | 215 |
| 225 | 216 def __repr__(self): |
| 288 | 217 return 'DEREF {}'.format(self.ptr) |
| 225 | 218 |
| 230 | 219 |
| 220 class TypeCast(Expression): | |
| 221 def __init__(self, to_type, x, loc): | |
| 222 super().__init__(loc) | |
| 223 self.to_type = to_type | |
| 224 self.a = x | |
| 288 | 225 |
| 230 | 226 def __repr__(self): |
| 227 return 'TYPECAST {}'.format(self.to_type) | |
| 228 | |
| 229 | |
| 306 | 230 class Member(Expression): |
| 231 """ Field reference of some object, can also be package selection """ | |
| 225 | 232 def __init__(self, base, field, loc): |
| 230 | 233 super().__init__(loc) |
| 225 | 234 assert isinstance(base, Expression) |
| 235 assert isinstance(field, str) | |
| 236 self.base = base | |
| 237 self.field = field | |
| 288 | 238 |
| 225 | 239 def __repr__(self): |
| 306 | 240 return 'MEMBER {}.{}'.format(self.base, self.field) |
| 225 | 241 |
| 230 | 242 |
| 354 | 243 class Index(Expression): |
| 244 """ Index something, for example an array """ | |
| 245 def __init__(self, base, i, loc): | |
| 246 super().__init__(loc) | |
| 247 self.base = base | |
| 248 self.i = i | |
| 249 | |
| 250 def __repr__(self): | |
| 251 return 'Index {}'.format(self.i) | |
| 252 | |
| 253 | |
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254 class Unop(Expression): |
| 306 | 255 """ Operation on one operand """ |
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256 def __init__(self, op, a, loc): |
| 230 | 257 super().__init__(loc) |
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258 assert isinstance(a, Expression) |
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259 assert isinstance(op, str) |
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260 self.a = a |
| 230 | 261 self.op = op |
| 288 | 262 |
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263 def __repr__(self): |
| 288 | 264 return 'UNOP {}'.format(self.op) |
| 265 | |
| 148 | 266 |
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267 class Binop(Expression): |
| 306 | 268 """ Expression taking two operands and one operator """ |
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269 def __init__(self, a, op, b, loc): |
| 230 | 270 super().__init__(loc) |
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271 assert isinstance(a, Expression), type(a) |
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272 assert isinstance(b, Expression) |
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273 assert isinstance(op, str) |
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274 self.a = a |
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275 self.b = b |
| 288 | 276 self.op = op # Operation: '+', '-', '*', '/', 'mod' |
| 148 | 277 |
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278 def __repr__(self): |
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279 return 'BINOP {}'.format(self.op) |
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280 |
| 288 | 281 |
| 306 | 282 class Identifier(Expression): |
| 283 """ Reference to some identifier, can be anything from package, variable | |
| 284 function or type, any named thing! """ | |
| 228 | 285 def __init__(self, target, loc): |
| 230 | 286 super().__init__(loc) |
| 228 | 287 self.target = target |
| 288 | 288 |
| 228 | 289 def __repr__(self): |
| 306 | 290 return 'ID {}'.format(self.target) |
| 163 | 291 |
| 284 | 292 |
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293 class Literal(Expression): |
| 306 | 294 """ Constant value or string """ |
| 228 | 295 def __init__(self, val, loc): |
| 230 | 296 super().__init__(loc) |
| 228 | 297 self.val = val |
| 288 | 298 |
| 228 | 299 def __repr__(self): |
| 300 return 'LITERAL {}'.format(self.val) | |
| 150 | 301 |
| 284 | 302 |
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303 class FunctionCall(Expression): |
| 306 | 304 """ Call to a some function """ |
| 228 | 305 def __init__(self, proc, args, loc): |
| 230 | 306 super().__init__(loc) |
| 228 | 307 self.proc = proc |
| 308 self.args = args | |
| 288 | 309 |
| 228 | 310 def __repr__(self): |
| 311 return 'CALL {0} '.format(self.proc) | |
| 148 | 312 |
| 284 | 313 |
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314 # Statements |
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315 class Statement(Node): |
| 306 | 316 """ Base class of all statements """ |
| 228 | 317 def __init__(self, loc): |
| 318 self.loc = loc | |
| 319 | |
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320 |
| 307 | 321 class Empty(Statement): |
| 306 | 322 """ Empty statement which does nothing! """ |
| 323 def __init__(self): | |
| 324 super().__init__(None) | |
| 325 | |
| 326 def __repr__(self): | |
| 327 return 'NOP' | |
| 328 | |
| 329 | |
| 307 | 330 class Compound(Statement): |
| 306 | 331 """ Statement consisting of a sequence of other statements """ |
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332 def __init__(self, statements): |
| 249 | 333 super().__init__(None) |
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334 self.statements = statements |
| 228 | 335 for s in self.statements: |
| 336 assert isinstance(s, Statement) | |
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337 |
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338 def __repr__(self): |
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339 return 'COMPOUND STATEMENT' |
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340 |
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341 |
| 307 | 342 class Return(Statement): |
| 228 | 343 def __init__(self, expr, loc): |
| 344 super().__init__(loc) | |
| 345 self.expr = expr | |
| 346 | |
| 347 def __repr__(self): | |
| 348 return 'RETURN STATEMENT' | |
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349 |
| 284 | 350 |
| 222 | 351 class Assignment(Statement): |
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352 def __init__(self, lval, rval, loc): |
| 228 | 353 super().__init__(loc) |
| 306 | 354 assert isinstance(lval, Expression) |
| 355 assert isinstance(rval, Expression) | |
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356 self.lval = lval |
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357 self.rval = rval |
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358 |
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359 def __repr__(self): |
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360 return 'ASSIGNMENT' |
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361 |
| 288 | 362 |
| 222 | 363 class ExpressionStatement(Statement): |
| 364 def __init__(self, ex, loc): | |
| 228 | 365 super().__init__(loc) |
| 222 | 366 self.ex = ex |
| 228 | 367 |
| 222 | 368 def __repr__(self): |
| 369 return 'Epression' | |
| 370 | |
| 228 | 371 |
| 307 | 372 class If(Statement): |
| 228 | 373 def __init__(self, condition, truestatement, falsestatement, loc): |
| 374 super().__init__(loc) | |
| 375 self.condition = condition | |
| 376 self.truestatement = truestatement | |
| 377 self.falsestatement = falsestatement | |
| 378 | |
| 379 def __repr__(self): | |
| 380 return 'IF-statement' | |
| 381 | |
| 148 | 382 |
| 307 | 383 class While(Statement): |
| 228 | 384 def __init__(self, condition, statement, loc): |
| 385 super().__init__(loc) | |
| 386 self.condition = condition | |
| 387 self.statement = statement | |
| 148 | 388 |
| 228 | 389 def __repr__(self): |
| 390 return 'WHILE-statement' | |
| 315 | 391 |
| 392 | |
| 393 class For(Statement): | |
| 394 def __init__(self, init, condition, final, statement, loc): | |
| 395 super().__init__(loc) | |
| 396 self.init = init | |
| 397 self.condition = condition | |
| 398 self.final = final | |
| 399 self.statement = statement | |
| 400 | |
| 401 def __repr__(self): | |
| 402 return 'FOR-statement' |