source: src/ResolvExpr/Resolver.cc@ d0ffed1

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 d0ffed1 was 32b8144, checked in by Rob Schluntz <rschlunt@…>, 9 years ago

resolve case labels and case ranges
  • Property mode set to 100644
File size: 21.7 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
12// Last Modified On : Tue Jul 12 17:45:42 2016
13// Update Count : 204
[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 );
[a32b204]242 }
[51b73452]243
[a436947]244 void Resolver::visit( EnumDecl * enumDecl ) {
245 // in case we decide to allow nested enums
[1d2b64f]246 ValueGuard< bool > oldInEnumDecl( inEnumDecl );
[a436947]247 inEnumDecl = true;
[1d2b64f]248 Parent::visit( enumDecl );
[a436947]249 }
250
[a32b204]251 void Resolver::visit( ExprStmt *exprStmt ) {
[1d2b64f]252 assertf( exprStmt->get_expr(), "ExprStmt has null Expression in resolver" );
253 Expression *newExpr = findVoidExpression( exprStmt->get_expr(), *this );
254 delete exprStmt->get_expr();
255 exprStmt->set_expr( newExpr );
[a32b204]256 }
[51b73452]257
[7f5566b]258 void Resolver::visit( AsmExpr *asmExpr ) {
259 Expression *newExpr = findVoidExpression( asmExpr->get_operand(), *this );
260 delete asmExpr->get_operand();
261 asmExpr->set_operand( newExpr );
262 if ( asmExpr->get_inout() ) {
263 newExpr = findVoidExpression( asmExpr->get_inout(), *this );
264 delete asmExpr->get_inout();
265 asmExpr->set_inout( newExpr );
266 } // if
267 }
268
269 void Resolver::visit( AsmStmt *asmStmt ) {
270 acceptAll( asmStmt->get_input(), *this);
271 acceptAll( asmStmt->get_output(), *this);
272 }
273
[a32b204]274 void Resolver::visit( IfStmt *ifStmt ) {
275 Expression *newExpr = findSingleExpression( ifStmt->get_condition(), *this );
276 delete ifStmt->get_condition();
277 ifStmt->set_condition( newExpr );
[1d2b64f]278 Parent::visit( ifStmt );
[a32b204]279 }
[51b73452]280
[a32b204]281 void Resolver::visit( WhileStmt *whileStmt ) {
282 Expression *newExpr = findSingleExpression( whileStmt->get_condition(), *this );
283 delete whileStmt->get_condition();
284 whileStmt->set_condition( newExpr );
[1d2b64f]285 Parent::visit( whileStmt );
[a32b204]286 }
[51b73452]287
[a32b204]288 void Resolver::visit( ForStmt *forStmt ) {
[1d2b64f]289 Parent::visit( forStmt );
[145f1fc]290
[a32b204]291 if ( forStmt->get_condition() ) {
[145f1fc]292 Expression * newExpr = findSingleExpression( forStmt->get_condition(), *this );
[a32b204]293 delete forStmt->get_condition();
294 forStmt->set_condition( newExpr );
295 } // if
[71f4e4f]296
[a32b204]297 if ( forStmt->get_increment() ) {
[145f1fc]298 Expression * newExpr = findVoidExpression( forStmt->get_increment(), *this );
[a32b204]299 delete forStmt->get_increment();
300 forStmt->set_increment( newExpr );
301 } // if
302 }
[51b73452]303
[32b8144]304 void Resolver::visit( SwitchStmt *switchStmt ) {
305 ValueGuard< Type * > oldInitContext( initContext );
[a32b204]306 Expression *newExpr;
[32b8144]307 newExpr = findIntegralExpression( switchStmt->get_condition(), *this );
[a32b204]308 delete switchStmt->get_condition();
309 switchStmt->set_condition( newExpr );
[71f4e4f]310
[32b8144]311 initContext = newExpr->get_result();
312 Parent::visit( switchStmt );
[a32b204]313 }
[51b73452]314
[a32b204]315 void Resolver::visit( CaseStmt *caseStmt ) {
[32b8144]316 if ( caseStmt->get_condition() ) {
317 assert( initContext );
318 CastExpr * castExpr = new CastExpr( caseStmt->get_condition(), initContext->clone() );
319 Expression * newExpr = findSingleExpression( castExpr, *this );
320 castExpr = safe_dynamic_cast< CastExpr * >( newExpr );
321 caseStmt->set_condition( castExpr->get_arg() );
322 castExpr->set_arg( nullptr );
323 delete castExpr;
324 }
[1d2b64f]325 Parent::visit( caseStmt );
[a32b204]326 }
[51b73452]327
[de62360d]328 void Resolver::visit( BranchStmt *branchStmt ) {
329 // must resolve the argument for a computed goto
330 if ( branchStmt->get_type() == BranchStmt::Goto ) { // check for computed goto statement
[2871210]331 if ( Expression * arg = branchStmt->get_computedTarget() ) {
[de62360d]332 VoidType v = Type::Qualifiers(); // cast to void * for the alternative finder
333 PointerType pt( Type::Qualifiers(), v.clone() );
334 CastExpr * castExpr = new CastExpr( arg, pt.clone() );
335 Expression * newExpr = findSingleExpression( castExpr, *this ); // find best expression
336 branchStmt->set_target( newExpr );
337 } // if
338 } // if
339 }
340
[a32b204]341 void Resolver::visit( ReturnStmt *returnStmt ) {
342 if ( returnStmt->get_expr() ) {
[906e24d]343 CastExpr *castExpr = new CastExpr( returnStmt->get_expr(), functionReturn->clone() );
[a32b204]344 Expression *newExpr = findSingleExpression( castExpr, *this );
345 delete castExpr;
346 returnStmt->set_expr( newExpr );
347 } // if
348 }
[51b73452]349
[b5c5684]350 template< typename T >
351 bool isCharType( T t ) {
352 if ( BasicType * bt = dynamic_cast< BasicType * >( t ) ) {
[71f4e4f]353 return bt->get_kind() == BasicType::Char || bt->get_kind() == BasicType::SignedChar ||
[b5c5684]354 bt->get_kind() == BasicType::UnsignedChar;
355 }
356 return false;
357 }
358
[a32b204]359 void Resolver::visit( SingleInit *singleInit ) {
360 if ( singleInit->get_value() ) {
[bdd516a]361#if 0
[a32b204]362 if (NameExpr * ne = dynamic_cast<NameExpr*>(singleInit->get_value())) {
363 string n = ne->get_name();
364 if (n == "0") {
[71f4e4f]365 initContext = new BasicType(Type::Qualifiers(),
[a32b204]366 BasicType::SignedInt);
367 } else {
[52f85e0]368 DeclarationWithType * decl = lookupId( n );
[a32b204]369 initContext = decl->get_type();
370 }
[71f4e4f]371 } else if (ConstantExpr * e =
[a32b204]372 dynamic_cast<ConstantExpr*>(singleInit->get_value())) {
373 Constant *c = e->get_constant();
374 initContext = c->get_type();
375 } else {
376 assert(0);
377 }
[bdd516a]378#endif
[a32b204]379 CastExpr *castExpr = new CastExpr( singleInit->get_value(), initContext->clone() );
380 Expression *newExpr = findSingleExpression( castExpr, *this );
381 delete castExpr;
382 singleInit->set_value( newExpr );
[b5c5684]383
384 // check if initializing type is char[]
385 if ( ArrayType * at = dynamic_cast< ArrayType * >( initContext ) ) {
386 if ( isCharType( at->get_base() ) ) {
387 // check if the resolved type is char *
[906e24d]388 if ( PointerType * pt = dynamic_cast< PointerType *>( newExpr->get_result() ) ) {
[b5c5684]389 if ( isCharType( pt->get_base() ) ) {
[52f85e0]390 // strip cast if we're initializing a char[] with a char *, e.g. char x[] = "hello";
[b5c5684]391 CastExpr *ce = dynamic_cast< CastExpr * >( newExpr );
392 singleInit->set_value( ce->get_arg() );
393 ce->set_arg( NULL );
[71f4e4f]394 delete ce;
[b5c5684]395 }
396 }
397 }
398 }
[a32b204]399 } // if
[6c3744e]400// singleInit->get_value()->accept( *this );
[a32b204]401 }
[51b73452]402
[30b65d8]403 template< typename AggrInst >
404 TypeSubstitution makeGenericSubstitutuion( AggrInst * inst ) {
[66f8528]405 assert( inst );
406 assert( inst->get_baseParameters() );
[30b65d8]407 std::list< TypeDecl * > baseParams = *inst->get_baseParameters();
408 std::list< Expression * > typeSubs = inst->get_parameters();
409 TypeSubstitution subs( baseParams.begin(), baseParams.end(), typeSubs.begin() );
410 return subs;
411 }
412
413 ReferenceToType * isStructOrUnion( Type * type ) {
414 if ( StructInstType * sit = dynamic_cast< StructInstType * >( type ) ) {
415 return sit;
416 } else if ( UnionInstType * uit = dynamic_cast< UnionInstType * >( type ) ) {
417 return uit;
418 }
419 return nullptr;
420 }
421
422 void Resolver::resolveSingleAggrInit( Declaration * dcl, InitIterator & init, InitIterator & initEnd, TypeSubstitution sub ) {
[94b4364]423 DeclarationWithType * dt = dynamic_cast< DeclarationWithType * >( dcl );
424 assert( dt );
[30b65d8]425 // need to substitute for generic types, so that casts are to concrete types
426 initContext = dt->get_type()->clone();
427 sub.apply( initContext );
428
[94b4364]429 try {
430 if ( init == initEnd ) return; // stop when there are no more initializers
431 (*init)->accept( *this );
432 ++init; // made it past an initializer
433 } catch( SemanticError & ) {
434 // need to delve deeper, if you can
[30b65d8]435 if ( ReferenceToType * type = isStructOrUnion( initContext ) ) {
436 resolveAggrInit( type, init, initEnd );
[94b4364]437 } else {
[1869adf]438 // member is not an aggregate type, so can't go any deeper
439
[94b4364]440 // might need to rethink what is being thrown
441 throw;
442 } // if
443 }
444 }
445
[30b65d8]446 void Resolver::resolveAggrInit( ReferenceToType * inst, InitIterator & init, InitIterator & initEnd ) {
447 if ( StructInstType * sit = dynamic_cast< StructInstType * >( inst ) ) {
448 TypeSubstitution sub = makeGenericSubstitutuion( sit );
449 StructDecl * st = sit->get_baseStruct();
[eeaea53]450 if(st->get_members().empty()) return;
[94b4364]451 // want to resolve each initializer to the members of the struct,
452 // but if there are more initializers than members we should stop
453 list< Declaration * >::iterator it = st->get_members().begin();
454 for ( ; it != st->get_members().end(); ++it) {
[30b65d8]455 resolveSingleAggrInit( *it, init, initEnd, sub );
[94b4364]456 }
[30b65d8]457 } else if ( UnionInstType * uit = dynamic_cast< UnionInstType * >( inst ) ) {
[66f8528]458 TypeSubstitution sub = makeGenericSubstitutuion( uit );
[30b65d8]459 UnionDecl * un = uit->get_baseUnion();
[eeaea53]460 if(un->get_members().empty()) return;
[94b4364]461 // only resolve to the first member of a union
[30b65d8]462 resolveSingleAggrInit( *un->get_members().begin(), init, initEnd, sub );
[94b4364]463 } // if
464 }
465
466 void Resolver::visit( ListInit * listInit ) {
[4d2434a]467 InitIterator iter = listInit->begin();
468 InitIterator end = listInit->end();
[94b4364]469
[b5c5684]470 if ( ArrayType * at = dynamic_cast< ArrayType * >( initContext ) ) {
[94b4364]471 // resolve each member to the base type of the array
472 for ( ; iter != end; ++iter ) {
[b5c5684]473 initContext = at->get_base();
474 (*iter)->accept( *this );
475 } // for
[65660bd]476 } else if ( TupleType * tt = dynamic_cast< TupleType * > ( initContext ) ) {
477 for ( Type * t : *tt ) {
478 if ( iter == end ) break;
479 initContext = t;
480 (*iter++)->accept( *this );
481 }
[30b65d8]482 } else if ( ReferenceToType * type = isStructOrUnion( initContext ) ) {
483 resolveAggrInit( type, iter, end );
[679864e1]484 } else if ( TypeInstType * tt = dynamic_cast< TypeInstType * >( initContext ) ) {
[242d458]485 Type * base = tt->get_baseType()->get_base();
486 if ( base ) {
487 // know the implementation type, so try using that as the initContext
488 initContext = base;
489 visit( listInit );
490 } else {
491 // missing implementation type -- might be an unknown type variable, so try proceeding with the current init context
[1d2b64f]492 Parent::visit( listInit );
[242d458]493 }
[b5c5684]494 } else {
[89e6ffc]495 assert( dynamic_cast< BasicType * >( initContext ) || dynamic_cast< PointerType * >( initContext )
[1d2b64f]496 || dynamic_cast< ZeroType * >( initContext ) || dynamic_cast< OneType * >( initContext ) || dynamic_cast < EnumInstType * > ( initContext ) );
[b5c5684]497 // basic types are handled here
[1d2b64f]498 Parent::visit( listInit );
[b5c5684]499 }
500
[bdd516a]501#if 0
[a32b204]502 if ( ArrayType *at = dynamic_cast<ArrayType*>(initContext) ) {
503 std::list<Initializer *>::iterator iter( listInit->begin_initializers() );
504 for ( ; iter != listInit->end_initializers(); ++iter ) {
505 initContext = at->get_base();
506 (*iter)->accept( *this );
507 } // for
508 } else if ( StructInstType *st = dynamic_cast<StructInstType*>(initContext) ) {
509 StructDecl *baseStruct = st->get_baseStruct();
510 std::list<Declaration *>::iterator iter1( baseStruct->get_members().begin() );
511 std::list<Initializer *>::iterator iter2( listInit->begin_initializers() );
512 for ( ; iter1 != baseStruct->get_members().end() && iter2 != listInit->end_initializers(); ++iter2 ) {
513 if ( (*iter2)->get_designators().empty() ) {
514 DeclarationWithType *dt = dynamic_cast<DeclarationWithType *>( *iter1 );
515 initContext = dt->get_type();
516 (*iter2)->accept( *this );
517 ++iter1;
518 } else {
519 StructDecl *st = baseStruct;
520 iter1 = st->get_members().begin();
521 std::list<Expression *>::iterator iter3( (*iter2)->get_designators().begin() );
522 for ( ; iter3 != (*iter2)->get_designators().end(); ++iter3 ) {
523 NameExpr *key = dynamic_cast<NameExpr *>( *iter3 );
524 assert( key );
525 for ( ; iter1 != st->get_members().end(); ++iter1 ) {
526 if ( key->get_name() == (*iter1)->get_name() ) {
527 (*iter1)->print( cout );
528 cout << key->get_name() << endl;
529 ObjectDecl *fred = dynamic_cast<ObjectDecl *>( *iter1 );
530 assert( fred );
531 StructInstType *mary = dynamic_cast<StructInstType*>( fred->get_type() );
532 assert( mary );
533 st = mary->get_baseStruct();
534 iter1 = st->get_members().begin();
535 break;
536 } // if
537 } // for
538 } // for
539 ObjectDecl *fred = dynamic_cast<ObjectDecl *>( *iter1 );
540 assert( fred );
541 initContext = fred->get_type();
542 (*listInit->begin_initializers())->accept( *this );
543 } // if
544 } // for
545 } else if ( UnionInstType *st = dynamic_cast<UnionInstType*>(initContext) ) {
546 DeclarationWithType *dt = dynamic_cast<DeclarationWithType *>( *st->get_baseUnion()->get_members().begin() );
547 initContext = dt->get_type();
548 (*listInit->begin_initializers())->accept( *this );
[2c2242c]549 } // if
[bdd516a]550#endif
[a32b204]551 }
[71f4e4f]552
[f1e012b]553 // ConstructorInit - fall back on C-style initializer
554 void Resolver::fallbackInit( ConstructorInit * ctorInit ) {
555 // could not find valid constructor, or found an intrinsic constructor
556 // fall back on C-style initializer
557 delete ctorInit->get_ctor();
558 ctorInit->set_ctor( NULL );
[71a145de]559 delete ctorInit->get_dtor();
560 ctorInit->set_dtor( NULL );
[f1e012b]561 maybeAccept( ctorInit->get_init(), *this );
562 }
563
[1d2b64f]564 // needs to be callable from outside the resolver, so this is a standalone function
565 void resolveCtorInit( ConstructorInit * ctorInit, const SymTab::Indexer & indexer ) {
566 assert( ctorInit );
567 Resolver resolver( indexer );
568 ctorInit->accept( resolver );
569 }
570
571 void resolveStmtExpr( StmtExpr * stmtExpr, const SymTab::Indexer & indexer ) {
572 assert( stmtExpr );
573 Resolver resolver( indexer );
574 stmtExpr->accept( resolver );
575 }
576
[71f4e4f]577 void Resolver::visit( ConstructorInit *ctorInit ) {
[1ba88a0]578 // xxx - fallback init has been removed => remove fallbackInit function and remove complexity from FixInit and remove C-init from ConstructorInit
579 maybeAccept( ctorInit->get_ctor(), *this );
580 maybeAccept( ctorInit->get_dtor(), *this );
[071a31a]581
[5b2f5bb]582 // found a constructor - can get rid of C-style initializer
583 delete ctorInit->get_init();
584 ctorInit->set_init( NULL );
[ec79847]585
586 // intrinsic single parameter constructors and destructors do nothing. Since this was
587 // implicitly generated, there's no way for it to have side effects, so get rid of it
588 // to clean up generated code.
[f9cebb5]589 if ( InitTweak::isIntrinsicSingleArgCallStmt( ctorInit->get_ctor() ) ) {
[ec79847]590 delete ctorInit->get_ctor();
591 ctorInit->set_ctor( NULL );
592 }
[f9cebb5]593
594 if ( InitTweak::isIntrinsicSingleArgCallStmt( ctorInit->get_dtor() ) ) {
[ec79847]595 delete ctorInit->get_dtor();
596 ctorInit->set_dtor( NULL );
597 }
[a465caff]598
599 // xxx - todo -- what about arrays?
600 // if ( dtor == NULL && InitTweak::isIntrinsicCallStmt( ctorInit->get_ctor() ) ) {
601 // // can reduce the constructor down to a SingleInit using the
602 // // second argument from the ctor call, since
603 // delete ctorInit->get_ctor();
604 // ctorInit->set_ctor( NULL );
605
606 // Expression * arg =
607 // ctorInit->set_init( new SingleInit( arg ) );
608 // }
[71f4e4f]609 }
[51b73452]610} // namespace ResolvExpr
[a32b204]611
612// Local Variables: //
613// tab-width: 4 //
614// mode: c++ //
615// compile-command: "make install" //
616// End: //
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