source: src/ResolvExpr/Resolver.cc@ 0428aad

ADT aaron-thesis arm-eh ast-experimental cleanup-dtors deferred_resn demangler enum forall-pointer-decay jacob/cs343-translation jenkins-sandbox new-ast new-ast-unique-expr new-env no_list persistent-indexer pthread-emulation qualifiedEnum resolv-new with_gc
Last change on this file since 0428aad was 6013bd7, checked in by Peter A. Buhr <pabuhr@…>, 9 years ago

first attempt at named designators
  • Property mode set to 100644
File size: 22.8 KB
RevLine 
[a32b204]1//
2// Cforall Version 1.0.0 Copyright (C) 2015 University of Waterloo
3//
4// The contents of this file are covered under the licence agreement in the
5// file "LICENCE" distributed with Cforall.
6//
[71f4e4f]7// Resolver.cc --
[a32b204]8//
9// Author : Richard C. Bilson
10// Created On : Sun May 17 12:17:01 2015
[4e06c1e]11// Last Modified By : Peter A. Buhr
[6013bd7]12// Last Modified On : Thu Mar 23 17:23:14 2017
13// Update Count : 211
[a32b204]14//
15
[51b73452]16#include "Resolver.h"
17#include "AlternativeFinder.h"
18#include "Alternative.h"
19#include "RenameVars.h"
20#include "ResolveTypeof.h"
[906e24d]21#include "typeops.h"
[51b73452]22#include "SynTree/Statement.h"
23#include "SynTree/Type.h"
24#include "SynTree/Expression.h"
25#include "SynTree/Initializer.h"
26#include "SymTab/Indexer.h"
[5f98ce5]27#include "SymTab/Autogen.h"
[d3b7937]28#include "Common/utility.h"
[7b3f66b]29#include "InitTweak/InitTweak.h"
[51b73452]30
[d9a0e76]31#include <iostream>
32using namespace std;
[51b73452]33
[d9a0e76]34namespace ResolvExpr {
[62e5546]35 class Resolver final : public SymTab::Indexer {
[a32b204]36 public:
[77971f6]37 Resolver() : SymTab::Indexer( false ) {}
[1d2b64f]38 Resolver( const SymTab:: Indexer & other ) : SymTab::Indexer( other ) {
39 if ( const Resolver * res = dynamic_cast< const Resolver * >( &other ) ) {
40 functionReturn = res->functionReturn;
41 initContext = res->initContext;
42 inEnumDecl = res->inEnumDecl;
43 }
44 }
[71f4e4f]45
[1d2b64f]46 typedef SymTab::Indexer Parent;
47 using Parent::visit;
[62e5546]48 virtual void visit( FunctionDecl *functionDecl ) override;
49 virtual void visit( ObjectDecl *functionDecl ) override;
50 virtual void visit( TypeDecl *typeDecl ) override;
51 virtual void visit( EnumDecl * enumDecl ) override;
[94b4364]52
[62e5546]53 virtual void visit( ArrayType * at ) override;
54 virtual void visit( PointerType * at ) override;
[d9a0e76]55
[62e5546]56 virtual void visit( ExprStmt *exprStmt ) override;
57 virtual void visit( AsmExpr *asmExpr ) override;
58 virtual void visit( AsmStmt *asmStmt ) override;
59 virtual void visit( IfStmt *ifStmt ) override;
60 virtual void visit( WhileStmt *whileStmt ) override;
61 virtual void visit( ForStmt *forStmt ) override;
62 virtual void visit( SwitchStmt *switchStmt ) override;
63 virtual void visit( CaseStmt *caseStmt ) override;
64 virtual void visit( BranchStmt *branchStmt ) override;
65 virtual void visit( ReturnStmt *returnStmt ) override;
[d9a0e76]66
[62e5546]67 virtual void visit( SingleInit *singleInit ) override;
68 virtual void visit( ListInit *listInit ) override;
69 virtual void visit( ConstructorInit *ctorInit ) override;
[a32b204]70 private:
[94b4364]71 typedef std::list< Initializer * >::iterator InitIterator;
72
[40e636a]73 template< typename PtrType >
74 void handlePtrType( PtrType * type );
75
[30b65d8]76 void resolveAggrInit( ReferenceToType *, InitIterator &, InitIterator & );
77 void resolveSingleAggrInit( Declaration *, InitIterator &, InitIterator &, TypeSubstitution sub );
[f1e012b]78 void fallbackInit( ConstructorInit * ctorInit );
[b726084]79
[77971f6]80 Type * functionReturn = nullptr;
81 Type *initContext = nullptr;
[a436947]82 bool inEnumDecl = false;
[a32b204]83 };
[d9a0e76]84
[a32b204]85 void resolve( std::list< Declaration * > translationUnit ) {
86 Resolver resolver;
87 acceptAll( translationUnit, resolver );
[d9a0e76]88 }
89
[a32b204]90 Expression *resolveInVoidContext( Expression *expr, const SymTab::Indexer &indexer ) {
91 TypeEnvironment env;
92 return resolveInVoidContext( expr, indexer, env );
[d9a0e76]93 }
[a32b204]94
[db4ecc5]95
[a32b204]96 namespace {
97 void finishExpr( Expression *expr, const TypeEnvironment &env ) {
98 expr->set_env( new TypeSubstitution );
99 env.makeSubstitution( *expr->get_env() );
100 }
[db4ecc5]101 } // namespace
[a32b204]102
[db4ecc5]103 Expression *findVoidExpression( Expression *untyped, const SymTab::Indexer &indexer ) {
104 global_renamer.reset();
105 TypeEnvironment env;
106 Expression *newExpr = resolveInVoidContext( untyped, indexer, env );
107 finishExpr( newExpr, env );
108 return newExpr;
109 }
[71f4e4f]110
[db4ecc5]111 namespace {
[a32b204]112 Expression *findSingleExpression( Expression *untyped, const SymTab::Indexer &indexer ) {
113 TypeEnvironment env;
114 AlternativeFinder finder( indexer, env );
115 finder.find( untyped );
[d9a0e76]116#if 0
[a32b204]117 if ( finder.get_alternatives().size() != 1 ) {
118 std::cout << "untyped expr is ";
119 untyped->print( std::cout );
120 std::cout << std::endl << "alternatives are:";
121 for ( std::list< Alternative >::const_iterator i = finder.get_alternatives().begin(); i != finder.get_alternatives().end(); ++i ) {
122 i->print( std::cout );
123 } // for
124 } // if
[d9a0e76]125#endif
[a32b204]126 assert( finder.get_alternatives().size() == 1 );
127 Alternative &choice = finder.get_alternatives().front();
128 Expression *newExpr = choice.expr->clone();
129 finishExpr( newExpr, choice.env );
130 return newExpr;
131 }
[d9a0e76]132
[a32b204]133 bool isIntegralType( Type *type ) {
134 if ( dynamic_cast< EnumInstType * >( type ) ) {
135 return true;
136 } else if ( BasicType *bt = dynamic_cast< BasicType * >( type ) ) {
137 return bt->isInteger();
[89e6ffc]138 } else if ( dynamic_cast< ZeroType* >( type ) != nullptr || dynamic_cast< OneType* >( type ) != nullptr ) {
139 return true;
[a32b204]140 } else {
141 return false;
142 } // if
143 }
[71f4e4f]144
[a32b204]145 Expression *findIntegralExpression( Expression *untyped, const SymTab::Indexer &indexer ) {
146 TypeEnvironment env;
147 AlternativeFinder finder( indexer, env );
148 finder.find( untyped );
[d9a0e76]149#if 0
[a32b204]150 if ( finder.get_alternatives().size() != 1 ) {
151 std::cout << "untyped expr is ";
152 untyped->print( std::cout );
153 std::cout << std::endl << "alternatives are:";
154 for ( std::list< Alternative >::const_iterator i = finder.get_alternatives().begin(); i != finder.get_alternatives().end(); ++i ) {
155 i->print( std::cout );
156 } // for
157 } // if
[d9a0e76]158#endif
[a32b204]159 Expression *newExpr = 0;
160 const TypeEnvironment *newEnv = 0;
161 for ( AltList::const_iterator i = finder.get_alternatives().begin(); i != finder.get_alternatives().end(); ++i ) {
[906e24d]162 if ( i->expr->get_result()->size() == 1 && isIntegralType( i->expr->get_result() ) ) {
[a32b204]163 if ( newExpr ) {
164 throw SemanticError( "Too many interpretations for case control expression", untyped );
165 } else {
166 newExpr = i->expr->clone();
167 newEnv = &i->env;
168 } // if
169 } // if
170 } // for
171 if ( ! newExpr ) {
172 throw SemanticError( "No interpretations for case control expression", untyped );
173 } // if
174 finishExpr( newExpr, *newEnv );
175 return newExpr;
176 }
[71f4e4f]177
[a32b204]178 }
[71f4e4f]179
[a32b204]180 void Resolver::visit( ObjectDecl *objectDecl ) {
181 Type *new_type = resolveTypeof( objectDecl->get_type(), *this );
182 objectDecl->set_type( new_type );
[3cfe27f]183 // To handle initialization of routine pointers, e.g., int (*fp)(int) = foo(), means that class-variable
184 // initContext is changed multiple time because the LHS is analysed twice. The second analysis changes
185 // initContext because of a function type can contain object declarations in the return and parameter types. So
186 // each value of initContext is retained, so the type on the first analysis is preserved and used for selecting
187 // the RHS.
188 Type *temp = initContext;
[a32b204]189 initContext = new_type;
[a436947]190 if ( inEnumDecl && dynamic_cast< EnumInstType * >( initContext ) ) {
191 // enumerator initializers should not use the enum type to initialize, since
192 // the enum type is still incomplete at this point. Use signed int instead.
193 initContext = new BasicType( Type::Qualifiers(), BasicType::SignedInt );
194 }
[1d2b64f]195 Parent::visit( objectDecl );
[a436947]196 if ( inEnumDecl && dynamic_cast< EnumInstType * >( initContext ) ) {
197 // delete newly created signed int type
198 delete initContext;
199 }
[3cfe27f]200 initContext = temp;
[bfbf97f]201 }
202
[40e636a]203 template< typename PtrType >
204 void Resolver::handlePtrType( PtrType * type ) {
205 if ( type->get_dimension() ) {
206 CastExpr *castExpr = new CastExpr( type->get_dimension(), SymTab::SizeType->clone() );
[bfbf97f]207 Expression *newExpr = findSingleExpression( castExpr, *this );
[40e636a]208 delete type->get_dimension();
209 type->set_dimension( newExpr );
[d1d17f5]210 }
[40e636a]211 }
212
213 void Resolver::visit( ArrayType * at ) {
214 handlePtrType( at );
[1d2b64f]215 Parent::visit( at );
[a32b204]216 }
[94b4364]217
[40e636a]218 void Resolver::visit( PointerType * pt ) {
219 handlePtrType( pt );
[1d2b64f]220 Parent::visit( pt );
[40e636a]221 }
222
[a32b204]223 void Resolver::visit( TypeDecl *typeDecl ) {
224 if ( typeDecl->get_base() ) {
225 Type *new_type = resolveTypeof( typeDecl->get_base(), *this );
226 typeDecl->set_base( new_type );
227 } // if
[1d2b64f]228 Parent::visit( typeDecl );
[a32b204]229 }
[94b4364]230
[a32b204]231 void Resolver::visit( FunctionDecl *functionDecl ) {
[d9a0e76]232#if 0
[a32b204]233 std::cout << "resolver visiting functiondecl ";
234 functionDecl->print( std::cout );
235 std::cout << std::endl;
[d9a0e76]236#endif
[a32b204]237 Type *new_type = resolveTypeof( functionDecl->get_type(), *this );
238 functionDecl->set_type( new_type );
[906e24d]239 ValueGuard< Type * > oldFunctionReturn( functionReturn );
240 functionReturn = ResolvExpr::extractResultType( functionDecl->get_functionType() );
[1d2b64f]241 Parent::visit( functionDecl );
[88d1066]242
243 // default value expressions have an environment which shouldn't be there and trips up later passes.
244 // xxx - it might be necessary to somehow keep the information from this environment, but I can't currently
245 // see how it's useful.
246 for ( Declaration * d : functionDecl->get_functionType()->get_parameters() ) {
247 if ( ObjectDecl * obj = dynamic_cast< ObjectDecl * >( d ) ) {
248 if ( SingleInit * init = dynamic_cast< SingleInit * >( obj->get_init() ) ) {
249 delete init->get_value()->get_env();
250 init->get_value()->set_env( nullptr );
251 }
252 }
253 }
[a32b204]254 }
[51b73452]255
[a436947]256 void Resolver::visit( EnumDecl * enumDecl ) {
257 // in case we decide to allow nested enums
[1d2b64f]258 ValueGuard< bool > oldInEnumDecl( inEnumDecl );
[a436947]259 inEnumDecl = true;
[1d2b64f]260 Parent::visit( enumDecl );
[a436947]261 }
262
[a32b204]263 void Resolver::visit( ExprStmt *exprStmt ) {
[1d2b64f]264 assertf( exprStmt->get_expr(), "ExprStmt has null Expression in resolver" );
265 Expression *newExpr = findVoidExpression( exprStmt->get_expr(), *this );
266 delete exprStmt->get_expr();
267 exprStmt->set_expr( newExpr );
[a32b204]268 }
[51b73452]269
[7f5566b]270 void Resolver::visit( AsmExpr *asmExpr ) {
271 Expression *newExpr = findVoidExpression( asmExpr->get_operand(), *this );
272 delete asmExpr->get_operand();
273 asmExpr->set_operand( newExpr );
274 if ( asmExpr->get_inout() ) {
275 newExpr = findVoidExpression( asmExpr->get_inout(), *this );
276 delete asmExpr->get_inout();
277 asmExpr->set_inout( newExpr );
278 } // if
279 }
280
281 void Resolver::visit( AsmStmt *asmStmt ) {
282 acceptAll( asmStmt->get_input(), *this);
283 acceptAll( asmStmt->get_output(), *this);
284 }
285
[a32b204]286 void Resolver::visit( IfStmt *ifStmt ) {
287 Expression *newExpr = findSingleExpression( ifStmt->get_condition(), *this );
288 delete ifStmt->get_condition();
289 ifStmt->set_condition( newExpr );
[1d2b64f]290 Parent::visit( ifStmt );
[a32b204]291 }
[51b73452]292
[a32b204]293 void Resolver::visit( WhileStmt *whileStmt ) {
294 Expression *newExpr = findSingleExpression( whileStmt->get_condition(), *this );
295 delete whileStmt->get_condition();
296 whileStmt->set_condition( newExpr );
[1d2b64f]297 Parent::visit( whileStmt );
[a32b204]298 }
[51b73452]299
[a32b204]300 void Resolver::visit( ForStmt *forStmt ) {
[1d2b64f]301 Parent::visit( forStmt );
[145f1fc]302
[a32b204]303 if ( forStmt->get_condition() ) {
[145f1fc]304 Expression * newExpr = findSingleExpression( forStmt->get_condition(), *this );
[a32b204]305 delete forStmt->get_condition();
306 forStmt->set_condition( newExpr );
307 } // if
[71f4e4f]308
[a32b204]309 if ( forStmt->get_increment() ) {
[145f1fc]310 Expression * newExpr = findVoidExpression( forStmt->get_increment(), *this );
[a32b204]311 delete forStmt->get_increment();
312 forStmt->set_increment( newExpr );
313 } // if
314 }
[51b73452]315
[32b8144]316 void Resolver::visit( SwitchStmt *switchStmt ) {
317 ValueGuard< Type * > oldInitContext( initContext );
[a32b204]318 Expression *newExpr;
[32b8144]319 newExpr = findIntegralExpression( switchStmt->get_condition(), *this );
[a32b204]320 delete switchStmt->get_condition();
321 switchStmt->set_condition( newExpr );
[71f4e4f]322
[32b8144]323 initContext = newExpr->get_result();
324 Parent::visit( switchStmt );
[a32b204]325 }
[51b73452]326
[a32b204]327 void Resolver::visit( CaseStmt *caseStmt ) {
[32b8144]328 if ( caseStmt->get_condition() ) {
329 assert( initContext );
330 CastExpr * castExpr = new CastExpr( caseStmt->get_condition(), initContext->clone() );
331 Expression * newExpr = findSingleExpression( castExpr, *this );
332 castExpr = safe_dynamic_cast< CastExpr * >( newExpr );
333 caseStmt->set_condition( castExpr->get_arg() );
334 castExpr->set_arg( nullptr );
335 delete castExpr;
336 }
[1d2b64f]337 Parent::visit( caseStmt );
[a32b204]338 }
[51b73452]339
[de62360d]340 void Resolver::visit( BranchStmt *branchStmt ) {
341 // must resolve the argument for a computed goto
342 if ( branchStmt->get_type() == BranchStmt::Goto ) { // check for computed goto statement
[2871210]343 if ( Expression * arg = branchStmt->get_computedTarget() ) {
[de62360d]344 VoidType v = Type::Qualifiers(); // cast to void * for the alternative finder
345 PointerType pt( Type::Qualifiers(), v.clone() );
346 CastExpr * castExpr = new CastExpr( arg, pt.clone() );
347 Expression * newExpr = findSingleExpression( castExpr, *this ); // find best expression
348 branchStmt->set_target( newExpr );
349 } // if
350 } // if
351 }
352
[a32b204]353 void Resolver::visit( ReturnStmt *returnStmt ) {
354 if ( returnStmt->get_expr() ) {
[906e24d]355 CastExpr *castExpr = new CastExpr( returnStmt->get_expr(), functionReturn->clone() );
[a32b204]356 Expression *newExpr = findSingleExpression( castExpr, *this );
357 delete castExpr;
358 returnStmt->set_expr( newExpr );
359 } // if
360 }
[51b73452]361
[b5c5684]362 template< typename T >
363 bool isCharType( T t ) {
364 if ( BasicType * bt = dynamic_cast< BasicType * >( t ) ) {
[71f4e4f]365 return bt->get_kind() == BasicType::Char || bt->get_kind() == BasicType::SignedChar ||
[b5c5684]366 bt->get_kind() == BasicType::UnsignedChar;
367 }
368 return false;
369 }
370
[a32b204]371 void Resolver::visit( SingleInit *singleInit ) {
372 if ( singleInit->get_value() ) {
[6013bd7]373 // // find all the d's
374 // std::list<Expression *> &designators = singleInit->get_designators();
375 // std::list<Type *> types1{ initContext }, types2;
376 // for ( Expression * expr: designators ) {
377 // cerr << expr << endl;
378 // if ( NameExpr * nexpr = dynamic_cast<NameExpr *>( expr ) ) {
379 // for ( Type * type: types1 ) {
380 // cerr << type << endl;
381 // ReferenceToType * fred = dynamic_cast<ReferenceToType *>(type);
382 // std::list<Declaration *> members;
383 // if ( fred ) {
384 // fred->lookup( nexpr->get_name(), members ); // concatenate identical field name
385 // for ( Declaration * mem: members ) {
386 // if ( DeclarationWithType * dwt = dynamic_cast<DeclarationWithType *>(mem) ) {
387 // types2.push_back( dwt->get_type() );
388 // } // if
389 // } // for
390 // } // if
391 // } // for
392 // types1 = types2;
393 // types2.clear();
394 // } // if
395 // } // for
396 // // for ( Type * type: types1 ) {
397 // // cerr << type << endl;
398 // // } // for
399
400 // // O(N^2) checks of d-types with f-types
401 // // find the minimum cost
[a32b204]402 CastExpr *castExpr = new CastExpr( singleInit->get_value(), initContext->clone() );
403 Expression *newExpr = findSingleExpression( castExpr, *this );
404 delete castExpr;
405 singleInit->set_value( newExpr );
[b5c5684]406
407 // check if initializing type is char[]
408 if ( ArrayType * at = dynamic_cast< ArrayType * >( initContext ) ) {
409 if ( isCharType( at->get_base() ) ) {
410 // check if the resolved type is char *
[906e24d]411 if ( PointerType * pt = dynamic_cast< PointerType *>( newExpr->get_result() ) ) {
[b5c5684]412 if ( isCharType( pt->get_base() ) ) {
[52f85e0]413 // strip cast if we're initializing a char[] with a char *, e.g. char x[] = "hello";
[b5c5684]414 CastExpr *ce = dynamic_cast< CastExpr * >( newExpr );
415 singleInit->set_value( ce->get_arg() );
416 ce->set_arg( NULL );
[71f4e4f]417 delete ce;
[b5c5684]418 }
419 }
420 }
421 }
[a32b204]422 } // if
423 }
[51b73452]424
[30b65d8]425 template< typename AggrInst >
426 TypeSubstitution makeGenericSubstitutuion( AggrInst * inst ) {
[66f8528]427 assert( inst );
428 assert( inst->get_baseParameters() );
[30b65d8]429 std::list< TypeDecl * > baseParams = *inst->get_baseParameters();
430 std::list< Expression * > typeSubs = inst->get_parameters();
431 TypeSubstitution subs( baseParams.begin(), baseParams.end(), typeSubs.begin() );
432 return subs;
433 }
434
435 ReferenceToType * isStructOrUnion( Type * type ) {
436 if ( StructInstType * sit = dynamic_cast< StructInstType * >( type ) ) {
437 return sit;
438 } else if ( UnionInstType * uit = dynamic_cast< UnionInstType * >( type ) ) {
439 return uit;
440 }
441 return nullptr;
442 }
443
444 void Resolver::resolveSingleAggrInit( Declaration * dcl, InitIterator & init, InitIterator & initEnd, TypeSubstitution sub ) {
[94b4364]445 DeclarationWithType * dt = dynamic_cast< DeclarationWithType * >( dcl );
446 assert( dt );
[30b65d8]447 // need to substitute for generic types, so that casts are to concrete types
448 initContext = dt->get_type()->clone();
449 sub.apply( initContext );
450
[94b4364]451 try {
452 if ( init == initEnd ) return; // stop when there are no more initializers
453 (*init)->accept( *this );
454 ++init; // made it past an initializer
455 } catch( SemanticError & ) {
456 // need to delve deeper, if you can
[30b65d8]457 if ( ReferenceToType * type = isStructOrUnion( initContext ) ) {
458 resolveAggrInit( type, init, initEnd );
[94b4364]459 } else {
[1869adf]460 // member is not an aggregate type, so can't go any deeper
461
[94b4364]462 // might need to rethink what is being thrown
463 throw;
464 } // if
465 }
466 }
467
[30b65d8]468 void Resolver::resolveAggrInit( ReferenceToType * inst, InitIterator & init, InitIterator & initEnd ) {
469 if ( StructInstType * sit = dynamic_cast< StructInstType * >( inst ) ) {
470 TypeSubstitution sub = makeGenericSubstitutuion( sit );
471 StructDecl * st = sit->get_baseStruct();
[eeaea53]472 if(st->get_members().empty()) return;
[94b4364]473 // want to resolve each initializer to the members of the struct,
474 // but if there are more initializers than members we should stop
475 list< Declaration * >::iterator it = st->get_members().begin();
476 for ( ; it != st->get_members().end(); ++it) {
[30b65d8]477 resolveSingleAggrInit( *it, init, initEnd, sub );
[94b4364]478 }
[30b65d8]479 } else if ( UnionInstType * uit = dynamic_cast< UnionInstType * >( inst ) ) {
[66f8528]480 TypeSubstitution sub = makeGenericSubstitutuion( uit );
[30b65d8]481 UnionDecl * un = uit->get_baseUnion();
[eeaea53]482 if(un->get_members().empty()) return;
[94b4364]483 // only resolve to the first member of a union
[30b65d8]484 resolveSingleAggrInit( *un->get_members().begin(), init, initEnd, sub );
[94b4364]485 } // if
486 }
487
488 void Resolver::visit( ListInit * listInit ) {
[4d2434a]489 InitIterator iter = listInit->begin();
490 InitIterator end = listInit->end();
[94b4364]491
[b5c5684]492 if ( ArrayType * at = dynamic_cast< ArrayType * >( initContext ) ) {
[94b4364]493 // resolve each member to the base type of the array
494 for ( ; iter != end; ++iter ) {
[b5c5684]495 initContext = at->get_base();
496 (*iter)->accept( *this );
497 } // for
[65660bd]498 } else if ( TupleType * tt = dynamic_cast< TupleType * > ( initContext ) ) {
499 for ( Type * t : *tt ) {
500 if ( iter == end ) break;
501 initContext = t;
502 (*iter++)->accept( *this );
503 }
[30b65d8]504 } else if ( ReferenceToType * type = isStructOrUnion( initContext ) ) {
505 resolveAggrInit( type, iter, end );
[679864e1]506 } else if ( TypeInstType * tt = dynamic_cast< TypeInstType * >( initContext ) ) {
[242d458]507 Type * base = tt->get_baseType()->get_base();
508 if ( base ) {
509 // know the implementation type, so try using that as the initContext
510 initContext = base;
511 visit( listInit );
512 } else {
513 // missing implementation type -- might be an unknown type variable, so try proceeding with the current init context
[1d2b64f]514 Parent::visit( listInit );
[242d458]515 }
[b5c5684]516 } else {
[89e6ffc]517 assert( dynamic_cast< BasicType * >( initContext ) || dynamic_cast< PointerType * >( initContext )
[1d2b64f]518 || dynamic_cast< ZeroType * >( initContext ) || dynamic_cast< OneType * >( initContext ) || dynamic_cast < EnumInstType * > ( initContext ) );
[b5c5684]519 // basic types are handled here
[1d2b64f]520 Parent::visit( listInit );
[b5c5684]521 }
522
[bdd516a]523#if 0
[a32b204]524 if ( ArrayType *at = dynamic_cast<ArrayType*>(initContext) ) {
525 std::list<Initializer *>::iterator iter( listInit->begin_initializers() );
526 for ( ; iter != listInit->end_initializers(); ++iter ) {
527 initContext = at->get_base();
528 (*iter)->accept( *this );
529 } // for
530 } else if ( StructInstType *st = dynamic_cast<StructInstType*>(initContext) ) {
531 StructDecl *baseStruct = st->get_baseStruct();
532 std::list<Declaration *>::iterator iter1( baseStruct->get_members().begin() );
533 std::list<Initializer *>::iterator iter2( listInit->begin_initializers() );
534 for ( ; iter1 != baseStruct->get_members().end() && iter2 != listInit->end_initializers(); ++iter2 ) {
535 if ( (*iter2)->get_designators().empty() ) {
536 DeclarationWithType *dt = dynamic_cast<DeclarationWithType *>( *iter1 );
537 initContext = dt->get_type();
538 (*iter2)->accept( *this );
539 ++iter1;
540 } else {
541 StructDecl *st = baseStruct;
542 iter1 = st->get_members().begin();
543 std::list<Expression *>::iterator iter3( (*iter2)->get_designators().begin() );
544 for ( ; iter3 != (*iter2)->get_designators().end(); ++iter3 ) {
545 NameExpr *key = dynamic_cast<NameExpr *>( *iter3 );
546 assert( key );
547 for ( ; iter1 != st->get_members().end(); ++iter1 ) {
548 if ( key->get_name() == (*iter1)->get_name() ) {
549 (*iter1)->print( cout );
550 cout << key->get_name() << endl;
551 ObjectDecl *fred = dynamic_cast<ObjectDecl *>( *iter1 );
552 assert( fred );
553 StructInstType *mary = dynamic_cast<StructInstType*>( fred->get_type() );
554 assert( mary );
555 st = mary->get_baseStruct();
556 iter1 = st->get_members().begin();
557 break;
558 } // if
559 } // for
560 } // for
561 ObjectDecl *fred = dynamic_cast<ObjectDecl *>( *iter1 );
562 assert( fred );
563 initContext = fred->get_type();
564 (*listInit->begin_initializers())->accept( *this );
565 } // if
566 } // for
567 } else if ( UnionInstType *st = dynamic_cast<UnionInstType*>(initContext) ) {
568 DeclarationWithType *dt = dynamic_cast<DeclarationWithType *>( *st->get_baseUnion()->get_members().begin() );
569 initContext = dt->get_type();
570 (*listInit->begin_initializers())->accept( *this );
[2c2242c]571 } // if
[bdd516a]572#endif
[a32b204]573 }
[71f4e4f]574
[f1e012b]575 // ConstructorInit - fall back on C-style initializer
576 void Resolver::fallbackInit( ConstructorInit * ctorInit ) {
577 // could not find valid constructor, or found an intrinsic constructor
578 // fall back on C-style initializer
579 delete ctorInit->get_ctor();
580 ctorInit->set_ctor( NULL );
[71a145de]581 delete ctorInit->get_dtor();
582 ctorInit->set_dtor( NULL );
[f1e012b]583 maybeAccept( ctorInit->get_init(), *this );
584 }
585
[1d2b64f]586 // needs to be callable from outside the resolver, so this is a standalone function
587 void resolveCtorInit( ConstructorInit * ctorInit, const SymTab::Indexer & indexer ) {
588 assert( ctorInit );
589 Resolver resolver( indexer );
590 ctorInit->accept( resolver );
591 }
592
593 void resolveStmtExpr( StmtExpr * stmtExpr, const SymTab::Indexer & indexer ) {
594 assert( stmtExpr );
595 Resolver resolver( indexer );
596 stmtExpr->accept( resolver );
597 }
598
[71f4e4f]599 void Resolver::visit( ConstructorInit *ctorInit ) {
[1ba88a0]600 // xxx - fallback init has been removed => remove fallbackInit function and remove complexity from FixInit and remove C-init from ConstructorInit
601 maybeAccept( ctorInit->get_ctor(), *this );
602 maybeAccept( ctorInit->get_dtor(), *this );
[071a31a]603
[5b2f5bb]604 // found a constructor - can get rid of C-style initializer
605 delete ctorInit->get_init();
606 ctorInit->set_init( NULL );
[ec79847]607
608 // intrinsic single parameter constructors and destructors do nothing. Since this was
609 // implicitly generated, there's no way for it to have side effects, so get rid of it
610 // to clean up generated code.
[f9cebb5]611 if ( InitTweak::isIntrinsicSingleArgCallStmt( ctorInit->get_ctor() ) ) {
[ec79847]612 delete ctorInit->get_ctor();
613 ctorInit->set_ctor( NULL );
614 }
[f9cebb5]615
616 if ( InitTweak::isIntrinsicSingleArgCallStmt( ctorInit->get_dtor() ) ) {
[ec79847]617 delete ctorInit->get_dtor();
618 ctorInit->set_dtor( NULL );
619 }
[a465caff]620
621 // xxx - todo -- what about arrays?
622 // if ( dtor == NULL && InitTweak::isIntrinsicCallStmt( ctorInit->get_ctor() ) ) {
623 // // can reduce the constructor down to a SingleInit using the
624 // // second argument from the ctor call, since
625 // delete ctorInit->get_ctor();
626 // ctorInit->set_ctor( NULL );
627
628 // Expression * arg =
629 // ctorInit->set_init( new SingleInit( arg ) );
630 // }
[71f4e4f]631 }
[51b73452]632} // namespace ResolvExpr
[a32b204]633
634// Local Variables: //
635// tab-width: 4 //
636// mode: c++ //
637// compile-command: "make install" //
638// End: //
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