Mercurial > lcfOS
annotate python/ppci/c3/astnodes.py @ 346:3bb7dcfe5529
expanded arm target
| author | Windel Bouwman |
|---|---|
| date | Fri, 07 Mar 2014 17:05:32 +0100 |
| parents | d1ecc493384e |
| children | 5477e499b039 |
| 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 |
| 288 | 10 |
| 148 | 11 class Node: |
| 306 | 12 """ Base class of all nodes in a AST """ |
| 288 | 13 pass |
| 14 | |
| 148 | 15 |
| 300 | 16 # Variables, parameters, local variables, constants and named types: |
| 17 class Symbol(Node): | |
| 308 | 18 """ Symbol is the base class for all named things like variables, |
| 306 | 19 functions, constants and types and modules """ |
| 300 | 20 def __init__(self, name): |
| 21 self.name = name | |
| 22 self.refs = [] | |
| 23 | |
| 24 def addRef(self, r): | |
| 25 self.refs.append(r) | |
| 26 | |
| 27 @property | |
| 28 def References(self): | |
| 29 return self.refs | |
| 30 | |
| 31 | |
| 213 | 32 # Modules |
| 301 | 33 class Package(Symbol): |
| 213 | 34 def __init__(self, name, loc): |
| 301 | 35 super().__init__(name) |
| 213 | 36 self.loc = loc |
| 37 self.declarations = [] | |
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38 self.imports = [] |
| 288 | 39 |
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40 def add_declaration(self, decl): |
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41 self.declarations.append(decl) |
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42 if isinstance(decl, Function): |
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43 decl.package = self |
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44 |
| 213 | 45 def __repr__(self): |
| 284 | 46 return 'MODULE {}'.format(self.name) |
| 47 | |
| 213 | 48 |
| 149 | 49 class Type(Node): |
| 306 | 50 """ Base class of all types """ |
| 288 | 51 pass |
| 272 | 52 |
| 148 | 53 |
| 300 | 54 class NamedType(Type, Symbol): |
| 308 | 55 """ Some types are named, for example a user defined type (typedef) |
| 306 | 56 and built in types. That is why this class derives from both Type |
| 57 and Symbol. """ | |
| 272 | 58 def __init__(self, name): |
| 300 | 59 Symbol.__init__(self, name) |
| 60 | |
| 61 | |
| 62 class BaseType(NamedType): | |
| 306 | 63 """ Built in type """ |
| 300 | 64 def __init__(self, name): |
| 65 super().__init__(name) | |
| 272 | 66 |
| 67 def __repr__(self): | |
| 68 return '{}'.format(self.name) | |
| 69 | |
| 148 | 70 |
| 71 class FunctionType(Type): | |
| 306 | 72 """ Function blueprint, defines argument types and return type """ |
| 288 | 73 def __init__(self, parametertypes, returntype): |
| 74 self.parametertypes = parametertypes | |
| 75 self.returntype = returntype | |
| 76 | |
| 77 def __repr__(self): | |
| 78 params = ', '.join([str(v) for v in self.parametertypes]) | |
| 79 return '{1} f({0})'.format(params, self.returntype) | |
| 148 | 80 |
| 272 | 81 |
| 213 | 82 class PointerType(Type): |
| 288 | 83 """ A type that points to data of some other type """ |
| 213 | 84 def __init__(self, ptype): |
| 306 | 85 assert isinstance(ptype, Type) or isinstance(ptype, Expression) |
| 213 | 86 self.ptype = ptype |
| 288 | 87 |
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88 def __repr__(self): |
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89 return '({}*)'.format(self.ptype) |
| 213 | 90 |
| 230 | 91 |
| 227 | 92 class StructField: |
| 316 | 93 """ Field of a struct type """ |
| 227 | 94 def __init__(self, name, typ): |
| 306 | 95 assert type(name) is str |
| 227 | 96 self.name = name |
| 97 self.typ = typ | |
| 230 | 98 |
| 227 | 99 |
| 213 | 100 class StructureType(Type): |
| 306 | 101 """ Struct type consisting of several named members """ |
| 213 | 102 def __init__(self, mems): |
| 103 self.mems = mems | |
| 306 | 104 assert all(type(mem) is StructField for mem in mems) |
| 230 | 105 |
| 225 | 106 def hasField(self, name): |
| 227 | 107 for mem in self.mems: |
| 108 if name == mem.name: | |
| 225 | 109 return True |
| 110 return False | |
| 230 | 111 |
| 225 | 112 def fieldType(self, name): |
| 230 | 113 return self.findField(name).typ |
| 114 | |
| 115 def fieldOffset(self, name): | |
| 116 return self.findField(name).offset | |
| 117 | |
| 118 def findField(self, name): | |
| 227 | 119 for mem in self.mems: |
| 120 if name == mem.name: | |
| 230 | 121 return mem |
| 122 raise KeyError(name) | |
| 225 | 123 |
| 230 | 124 def __repr__(self): |
| 125 return 'STRUCT' | |
| 213 | 126 |
| 272 | 127 |
| 300 | 128 class DefinedType(NamedType): |
| 288 | 129 """ A named type indicating another type """ |
| 225 | 130 def __init__(self, name, typ, loc): |
| 131 assert isinstance(name, str) | |
| 300 | 132 super().__init__(name) |
| 225 | 133 self.typ = typ |
| 134 self.loc = loc | |
| 230 | 135 |
| 225 | 136 def __repr__(self): |
| 137 return 'Named type {0} of type {1}'.format(self.name, self.typ) | |
| 148 | 138 |
| 221 | 139 |
| 148 | 140 class Constant(Symbol): |
| 316 | 141 """ Constant definition """ |
| 213 | 142 def __init__(self, name, typ, value): |
| 272 | 143 super().__init__(name) |
| 144 self.typ = typ | |
| 145 self.value = value | |
| 146 | |
| 213 | 147 def __repr__(self): |
| 272 | 148 return 'CONSTANT {0} = {1}'.format(self.name, self.value) |
| 149 | |
| 148 | 150 |
| 151 class Variable(Symbol): | |
| 272 | 152 def __init__(self, name, typ): |
| 153 super().__init__(name) | |
| 154 self.typ = typ | |
| 155 self.isLocal = False | |
| 156 self.isParameter = False | |
| 157 | |
| 158 def __repr__(self): | |
| 159 return 'Var {} [{}]'.format(self.name, self.typ) | |
| 160 | |
| 161 | |
| 162 class LocalVariable(Variable): | |
| 163 def __init__(self, name, typ): | |
| 164 super().__init__(name, typ) | |
| 165 self.isLocal = True | |
| 166 | |
| 167 | |
| 168 class FormalParameter(Variable): | |
| 169 def __init__(self, name, typ): | |
| 170 super().__init__(name, typ) | |
| 171 self.isParameter = True | |
| 172 | |
| 148 | 173 |
| 150 | 174 # Procedure types |
| 175 class Function(Symbol): | |
| 213 | 176 """ Actual implementation of a function """ |
| 177 def __init__(self, name, loc): | |
| 178 super().__init__(name) | |
| 179 self.loc = loc | |
| 215 | 180 self.declarations = [] |
| 213 | 181 |
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182 def add_declaration(self, decl): |
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183 self.declarations.append(decl) |
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184 |
| 213 | 185 def __repr__(self): |
| 217 | 186 return 'Func {}'.format(self.name) |
| 148 | 187 |
| 288 | 188 |
| 163 | 189 # Operations / Expressions: |
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190 class Expression(Node): |
| 230 | 191 def __init__(self, loc): |
| 192 self.loc = loc | |
| 193 | |
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194 |
| 225 | 195 class Deref(Expression): |
| 196 def __init__(self, ptr, loc): | |
| 230 | 197 super().__init__(loc) |
| 225 | 198 assert isinstance(ptr, Expression) |
| 199 self.ptr = ptr | |
| 288 | 200 |
| 225 | 201 def __repr__(self): |
| 288 | 202 return 'DEREF {}'.format(self.ptr) |
| 225 | 203 |
| 230 | 204 |
| 205 class TypeCast(Expression): | |
| 206 def __init__(self, to_type, x, loc): | |
| 207 super().__init__(loc) | |
| 208 self.to_type = to_type | |
| 209 self.a = x | |
| 288 | 210 |
| 230 | 211 def __repr__(self): |
| 212 return 'TYPECAST {}'.format(self.to_type) | |
| 213 | |
| 214 | |
| 306 | 215 class Member(Expression): |
| 216 """ Field reference of some object, can also be package selection """ | |
| 225 | 217 def __init__(self, base, field, loc): |
| 230 | 218 super().__init__(loc) |
| 225 | 219 assert isinstance(base, Expression) |
| 220 assert isinstance(field, str) | |
| 221 self.base = base | |
| 222 self.field = field | |
| 288 | 223 |
| 225 | 224 def __repr__(self): |
| 306 | 225 return 'MEMBER {}.{}'.format(self.base, self.field) |
| 225 | 226 |
| 230 | 227 |
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228 class Unop(Expression): |
| 306 | 229 """ Operation on one operand """ |
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230 def __init__(self, op, a, loc): |
| 230 | 231 super().__init__(loc) |
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232 assert isinstance(a, Expression) |
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233 assert isinstance(op, str) |
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234 self.a = a |
| 230 | 235 self.op = op |
| 288 | 236 |
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237 def __repr__(self): |
| 288 | 238 return 'UNOP {}'.format(self.op) |
| 239 | |
| 148 | 240 |
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241 class Binop(Expression): |
| 306 | 242 """ Expression taking two operands and one operator """ |
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243 def __init__(self, a, op, b, loc): |
| 230 | 244 super().__init__(loc) |
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245 assert isinstance(a, Expression), type(a) |
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246 assert isinstance(b, Expression) |
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247 assert isinstance(op, str) |
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248 self.a = a |
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249 self.b = b |
| 288 | 250 self.op = op # Operation: '+', '-', '*', '/', 'mod' |
| 148 | 251 |
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252 def __repr__(self): |
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253 return 'BINOP {}'.format(self.op) |
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254 |
| 288 | 255 |
| 306 | 256 class Identifier(Expression): |
| 257 """ Reference to some identifier, can be anything from package, variable | |
| 258 function or type, any named thing! """ | |
| 228 | 259 def __init__(self, target, loc): |
| 230 | 260 super().__init__(loc) |
| 228 | 261 self.target = target |
| 288 | 262 |
| 228 | 263 def __repr__(self): |
| 306 | 264 return 'ID {}'.format(self.target) |
| 163 | 265 |
| 284 | 266 |
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267 class Literal(Expression): |
| 306 | 268 """ Constant value or string """ |
| 228 | 269 def __init__(self, val, loc): |
| 230 | 270 super().__init__(loc) |
| 228 | 271 self.val = val |
| 288 | 272 |
| 228 | 273 def __repr__(self): |
| 274 return 'LITERAL {}'.format(self.val) | |
| 150 | 275 |
| 284 | 276 |
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277 class FunctionCall(Expression): |
| 306 | 278 """ Call to a some function """ |
| 228 | 279 def __init__(self, proc, args, loc): |
| 230 | 280 super().__init__(loc) |
| 228 | 281 self.proc = proc |
| 282 self.args = args | |
| 288 | 283 |
| 228 | 284 def __repr__(self): |
| 285 return 'CALL {0} '.format(self.proc) | |
| 148 | 286 |
| 284 | 287 |
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288 # Statements |
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289 class Statement(Node): |
| 306 | 290 """ Base class of all statements """ |
| 228 | 291 def __init__(self, loc): |
| 292 self.loc = loc | |
| 293 | |
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294 |
| 307 | 295 class Empty(Statement): |
| 306 | 296 """ Empty statement which does nothing! """ |
| 297 def __init__(self): | |
| 298 super().__init__(None) | |
| 299 | |
| 300 def __repr__(self): | |
| 301 return 'NOP' | |
| 302 | |
| 303 | |
| 307 | 304 class Compound(Statement): |
| 306 | 305 """ Statement consisting of a sequence of other statements """ |
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306 def __init__(self, statements): |
| 249 | 307 super().__init__(None) |
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308 self.statements = statements |
| 228 | 309 for s in self.statements: |
| 310 assert isinstance(s, Statement) | |
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311 |
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312 def __repr__(self): |
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313 return 'COMPOUND STATEMENT' |
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314 |
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315 |
| 307 | 316 class Return(Statement): |
| 228 | 317 def __init__(self, expr, loc): |
| 318 super().__init__(loc) | |
| 319 self.expr = expr | |
| 320 | |
| 321 def __repr__(self): | |
| 322 return 'RETURN STATEMENT' | |
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323 |
| 284 | 324 |
| 222 | 325 class Assignment(Statement): |
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326 def __init__(self, lval, rval, loc): |
| 228 | 327 super().__init__(loc) |
| 306 | 328 assert isinstance(lval, Expression) |
| 329 assert isinstance(rval, Expression) | |
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330 self.lval = lval |
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331 self.rval = rval |
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332 |
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333 def __repr__(self): |
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334 return 'ASSIGNMENT' |
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335 |
| 288 | 336 |
| 222 | 337 class ExpressionStatement(Statement): |
| 338 def __init__(self, ex, loc): | |
| 228 | 339 super().__init__(loc) |
| 222 | 340 self.ex = ex |
| 228 | 341 |
| 222 | 342 def __repr__(self): |
| 343 return 'Epression' | |
| 344 | |
| 228 | 345 |
| 307 | 346 class If(Statement): |
| 228 | 347 def __init__(self, condition, truestatement, falsestatement, loc): |
| 348 super().__init__(loc) | |
| 349 self.condition = condition | |
| 350 self.truestatement = truestatement | |
| 351 self.falsestatement = falsestatement | |
| 352 | |
| 353 def __repr__(self): | |
| 354 return 'IF-statement' | |
| 355 | |
| 148 | 356 |
| 307 | 357 class While(Statement): |
| 228 | 358 def __init__(self, condition, statement, loc): |
| 359 super().__init__(loc) | |
| 360 self.condition = condition | |
| 361 self.statement = statement | |
| 148 | 362 |
| 228 | 363 def __repr__(self): |
| 364 return 'WHILE-statement' | |
| 315 | 365 |
| 366 | |
| 367 class For(Statement): | |
| 368 def __init__(self, init, condition, final, statement, loc): | |
| 369 super().__init__(loc) | |
| 370 self.init = init | |
| 371 self.condition = condition | |
| 372 self.final = final | |
| 373 self.statement = statement | |
| 374 | |
| 375 def __repr__(self): | |
| 376 return 'FOR-statement' |