[a32b204] | 1 | //
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| 2 | // Cforall Version 1.0.0 Copyright (C) 2015 University of Waterloo
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| 3 | //
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| 4 | // The contents of this file are covered under the licence agreement in the
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| 5 | // file "LICENCE" distributed with Cforall.
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| 6 | //
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| 7 | // Resolver.cc --
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| 8 | //
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| 9 | // Author : Richard C. Bilson
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| 10 | // Created On : Sun May 17 12:17:01 2015
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[b5c5684] | 11 | // Last Modified By : Rob Schluntz
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[bfbf97f] | 12 | // Last Modified On : Wed Jun 10 16:11:19 2015
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| 13 | // Update Count : 77
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[a32b204] | 14 | //
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| 15 |
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[51b73452] | 16 | #include "Resolver.h"
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| 17 | #include "AlternativeFinder.h"
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| 18 | #include "Alternative.h"
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| 19 | #include "RenameVars.h"
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| 20 | #include "ResolveTypeof.h"
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| 21 | #include "SynTree/Statement.h"
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| 22 | #include "SynTree/Type.h"
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| 23 | #include "SynTree/Expression.h"
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| 24 | #include "SynTree/Initializer.h"
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| 25 | #include "SymTab/Indexer.h"
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| 26 | #include "utility.h"
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| 27 |
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[d9a0e76] | 28 | #include <iostream>
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| 29 | using namespace std;
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[51b73452] | 30 |
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[d9a0e76] | 31 | namespace ResolvExpr {
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[a32b204] | 32 | class Resolver : public SymTab::Indexer {
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| 33 | public:
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| 34 | Resolver() : SymTab::Indexer( false ), switchType( 0 ) {}
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[51b73452] | 35 |
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[a32b204] | 36 | virtual void visit( FunctionDecl *functionDecl );
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| 37 | virtual void visit( ObjectDecl *functionDecl );
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| 38 | virtual void visit( TypeDecl *typeDecl );
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[bfbf97f] | 39 | virtual void visit( ArrayType * at );
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[d9a0e76] | 40 |
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[a32b204] | 41 | virtual void visit( ExprStmt *exprStmt );
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| 42 | virtual void visit( IfStmt *ifStmt );
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| 43 | virtual void visit( WhileStmt *whileStmt );
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| 44 | virtual void visit( ForStmt *forStmt );
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| 45 | virtual void visit( SwitchStmt *switchStmt );
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| 46 | virtual void visit( ChooseStmt *switchStmt );
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| 47 | virtual void visit( CaseStmt *caseStmt );
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| 48 | virtual void visit( ReturnStmt *returnStmt );
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[d9a0e76] | 49 |
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[a32b204] | 50 | virtual void visit( SingleInit *singleInit );
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| 51 | virtual void visit( ListInit *listInit );
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| 52 | private:
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| 53 | std::list< Type * > functionReturn;
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| 54 | Type *initContext;
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| 55 | Type *switchType;
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| 56 | };
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[d9a0e76] | 57 |
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[a32b204] | 58 | void resolve( std::list< Declaration * > translationUnit ) {
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| 59 | Resolver resolver;
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| 60 | acceptAll( translationUnit, resolver );
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[d9a0e76] | 61 | #if 0
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[a32b204] | 62 | resolver.print( cerr );
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| 63 | for ( std::list< Declaration * >::iterator i = translationUnit.begin(); i != translationUnit.end(); ++i ) {
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| 64 | (*i)->print( std::cerr );
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| 65 | (*i)->accept( resolver );
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| 66 | } // for
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[d9a0e76] | 67 | #endif
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| 68 | }
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| 69 |
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[a32b204] | 70 | Expression *resolveInVoidContext( Expression *expr, const SymTab::Indexer &indexer ) {
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| 71 | TypeEnvironment env;
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| 72 | return resolveInVoidContext( expr, indexer, env );
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[d9a0e76] | 73 | }
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[a32b204] | 74 |
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| 75 | namespace {
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| 76 | void finishExpr( Expression *expr, const TypeEnvironment &env ) {
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| 77 | expr->set_env( new TypeSubstitution );
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| 78 | env.makeSubstitution( *expr->get_env() );
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| 79 | }
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| 80 |
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| 81 | Expression *findVoidExpression( Expression *untyped, const SymTab::Indexer &indexer ) {
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| 82 | global_renamer.reset();
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| 83 | TypeEnvironment env;
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| 84 | Expression *newExpr = resolveInVoidContext( untyped, indexer, env );
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| 85 | finishExpr( newExpr, env );
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| 86 | return newExpr;
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| 87 | }
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[51b73452] | 88 |
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[a32b204] | 89 | Expression *findSingleExpression( Expression *untyped, const SymTab::Indexer &indexer ) {
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| 90 | TypeEnvironment env;
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| 91 | AlternativeFinder finder( indexer, env );
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| 92 | finder.find( untyped );
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[d9a0e76] | 93 | #if 0
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[a32b204] | 94 | if ( finder.get_alternatives().size() != 1 ) {
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| 95 | std::cout << "untyped expr is ";
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| 96 | untyped->print( std::cout );
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| 97 | std::cout << std::endl << "alternatives are:";
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| 98 | for ( std::list< Alternative >::const_iterator i = finder.get_alternatives().begin(); i != finder.get_alternatives().end(); ++i ) {
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| 99 | i->print( std::cout );
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| 100 | } // for
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| 101 | } // if
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[d9a0e76] | 102 | #endif
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[a32b204] | 103 | assert( finder.get_alternatives().size() == 1 );
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| 104 | Alternative &choice = finder.get_alternatives().front();
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| 105 | Expression *newExpr = choice.expr->clone();
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| 106 | finishExpr( newExpr, choice.env );
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| 107 | return newExpr;
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| 108 | }
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[d9a0e76] | 109 |
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[a32b204] | 110 | bool isIntegralType( Type *type ) {
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| 111 | if ( dynamic_cast< EnumInstType * >( type ) ) {
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| 112 | return true;
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| 113 | } else if ( BasicType *bt = dynamic_cast< BasicType * >( type ) ) {
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| 114 | return bt->isInteger();
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| 115 | } else {
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| 116 | return false;
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| 117 | } // if
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| 118 | }
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[51b73452] | 119 |
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[a32b204] | 120 | Expression *findIntegralExpression( Expression *untyped, const SymTab::Indexer &indexer ) {
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| 121 | TypeEnvironment env;
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| 122 | AlternativeFinder finder( indexer, env );
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| 123 | finder.find( untyped );
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[d9a0e76] | 124 | #if 0
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[a32b204] | 125 | if ( finder.get_alternatives().size() != 1 ) {
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| 126 | std::cout << "untyped expr is ";
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| 127 | untyped->print( std::cout );
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| 128 | std::cout << std::endl << "alternatives are:";
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| 129 | for ( std::list< Alternative >::const_iterator i = finder.get_alternatives().begin(); i != finder.get_alternatives().end(); ++i ) {
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| 130 | i->print( std::cout );
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| 131 | } // for
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| 132 | } // if
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[d9a0e76] | 133 | #endif
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[a32b204] | 134 | Expression *newExpr = 0;
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| 135 | const TypeEnvironment *newEnv = 0;
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| 136 | for ( AltList::const_iterator i = finder.get_alternatives().begin(); i != finder.get_alternatives().end(); ++i ) {
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| 137 | if ( i->expr->get_results().size() == 1 && isIntegralType( i->expr->get_results().front() ) ) {
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| 138 | if ( newExpr ) {
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| 139 | throw SemanticError( "Too many interpretations for case control expression", untyped );
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| 140 | } else {
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| 141 | newExpr = i->expr->clone();
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| 142 | newEnv = &i->env;
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| 143 | } // if
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| 144 | } // if
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| 145 | } // for
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| 146 | if ( ! newExpr ) {
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| 147 | throw SemanticError( "No interpretations for case control expression", untyped );
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| 148 | } // if
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| 149 | finishExpr( newExpr, *newEnv );
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| 150 | return newExpr;
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| 151 | }
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[51b73452] | 152 |
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[a32b204] | 153 | }
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[51b73452] | 154 |
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[a32b204] | 155 | void Resolver::visit( ObjectDecl *objectDecl ) {
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| 156 | Type *new_type = resolveTypeof( objectDecl->get_type(), *this );
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| 157 | objectDecl->set_type( new_type );
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| 158 | initContext = new_type;
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| 159 | SymTab::Indexer::visit( objectDecl );
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[bfbf97f] | 160 | }
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| 161 |
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| 162 | void Resolver::visit( ArrayType * at ) {
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| 163 | if ( at->get_dimension() ) {
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| 164 | BasicType arrayLenType = BasicType( Type::Qualifiers(), BasicType::LongUnsignedInt );
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| 165 | CastExpr *castExpr = new CastExpr( at->get_dimension(), arrayLenType.clone() );
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| 166 | Expression *newExpr = findSingleExpression( castExpr, *this );
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| 167 | delete at->get_dimension();
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| 168 | at->set_dimension( newExpr );
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[d1d17f5] | 169 |
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| 170 | }
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[bfbf97f] | 171 | Visitor::visit( at );
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[a32b204] | 172 | }
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[51b73452] | 173 |
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[a32b204] | 174 | void Resolver::visit( TypeDecl *typeDecl ) {
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| 175 | if ( typeDecl->get_base() ) {
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| 176 | Type *new_type = resolveTypeof( typeDecl->get_base(), *this );
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| 177 | typeDecl->set_base( new_type );
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| 178 | } // if
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| 179 | SymTab::Indexer::visit( typeDecl );
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| 180 | }
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[51b73452] | 181 |
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[a32b204] | 182 | void Resolver::visit( FunctionDecl *functionDecl ) {
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[d9a0e76] | 183 | #if 0
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[a32b204] | 184 | std::cout << "resolver visiting functiondecl ";
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| 185 | functionDecl->print( std::cout );
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| 186 | std::cout << std::endl;
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[d9a0e76] | 187 | #endif
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[a32b204] | 188 | Type *new_type = resolveTypeof( functionDecl->get_type(), *this );
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| 189 | functionDecl->set_type( new_type );
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| 190 | std::list< Type * > oldFunctionReturn = functionReturn;
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| 191 | functionReturn.clear();
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| 192 | for ( std::list< DeclarationWithType * >::const_iterator i = functionDecl->get_functionType()->get_returnVals().begin(); i != functionDecl->get_functionType()->get_returnVals().end(); ++i ) {
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| 193 | functionReturn.push_back( (*i)->get_type() );
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| 194 | } // for
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| 195 | SymTab::Indexer::visit( functionDecl );
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| 196 | functionReturn = oldFunctionReturn;
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| 197 | }
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[51b73452] | 198 |
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[a32b204] | 199 | void Resolver::visit( ExprStmt *exprStmt ) {
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| 200 | if ( exprStmt->get_expr() ) {
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| 201 | Expression *newExpr = findVoidExpression( exprStmt->get_expr(), *this );
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| 202 | delete exprStmt->get_expr();
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| 203 | exprStmt->set_expr( newExpr );
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| 204 | } // if
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| 205 | }
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[51b73452] | 206 |
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[a32b204] | 207 | void Resolver::visit( IfStmt *ifStmt ) {
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| 208 | Expression *newExpr = findSingleExpression( ifStmt->get_condition(), *this );
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| 209 | delete ifStmt->get_condition();
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| 210 | ifStmt->set_condition( newExpr );
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| 211 | Visitor::visit( ifStmt );
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| 212 | }
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[51b73452] | 213 |
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[a32b204] | 214 | void Resolver::visit( WhileStmt *whileStmt ) {
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| 215 | Expression *newExpr = findSingleExpression( whileStmt->get_condition(), *this );
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| 216 | delete whileStmt->get_condition();
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| 217 | whileStmt->set_condition( newExpr );
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| 218 | Visitor::visit( whileStmt );
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| 219 | }
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[51b73452] | 220 |
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[a32b204] | 221 | void Resolver::visit( ForStmt *forStmt ) {
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| 222 | // SymTab::Indexer::visit( forStmt );
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| 223 | Expression *newExpr;
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| 224 | // for statements introduce a level of scope
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| 225 | enterScope();
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| 226 | maybeAccept( forStmt->get_initialization(), *this );
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| 227 | if ( forStmt->get_condition() ) {
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| 228 | newExpr = findSingleExpression( forStmt->get_condition(), *this );
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| 229 | delete forStmt->get_condition();
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| 230 | forStmt->set_condition( newExpr );
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| 231 | } // if
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[51b73452] | 232 |
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[a32b204] | 233 | if ( forStmt->get_increment() ) {
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| 234 | newExpr = findVoidExpression( forStmt->get_increment(), *this );
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| 235 | delete forStmt->get_increment();
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| 236 | forStmt->set_increment( newExpr );
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| 237 | } // if
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[b1a6d6b] | 238 |
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[a32b204] | 239 | maybeAccept( forStmt->get_condition(), *this );
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| 240 | maybeAccept( forStmt->get_increment(), *this );
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| 241 | maybeAccept( forStmt->get_body(), *this );
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| 242 | leaveScope();
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| 243 | }
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[51b73452] | 244 |
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[a32b204] | 245 | template< typename SwitchClass >
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| 246 | void handleSwitchStmt( SwitchClass *switchStmt, SymTab::Indexer &visitor ) {
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| 247 | Expression *newExpr;
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| 248 | newExpr = findIntegralExpression( switchStmt->get_condition(), visitor );
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| 249 | delete switchStmt->get_condition();
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| 250 | switchStmt->set_condition( newExpr );
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[51b73452] | 251 |
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[a32b204] | 252 | visitor.Visitor::visit( switchStmt );
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| 253 | }
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[51b73452] | 254 |
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[a32b204] | 255 | void Resolver::visit( SwitchStmt *switchStmt ) {
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| 256 | handleSwitchStmt( switchStmt, *this );
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| 257 | }
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[51b73452] | 258 |
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[a32b204] | 259 | void Resolver::visit( ChooseStmt *switchStmt ) {
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| 260 | handleSwitchStmt( switchStmt, *this );
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| 261 | }
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[51b73452] | 262 |
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[a32b204] | 263 | void Resolver::visit( CaseStmt *caseStmt ) {
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| 264 | Visitor::visit( caseStmt );
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| 265 | }
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[51b73452] | 266 |
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[a32b204] | 267 | void Resolver::visit( ReturnStmt *returnStmt ) {
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| 268 | if ( returnStmt->get_expr() ) {
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| 269 | CastExpr *castExpr = new CastExpr( returnStmt->get_expr() );
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| 270 | cloneAll( functionReturn, castExpr->get_results() );
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| 271 | Expression *newExpr = findSingleExpression( castExpr, *this );
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| 272 | delete castExpr;
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| 273 | returnStmt->set_expr( newExpr );
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| 274 | } // if
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| 275 | }
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[51b73452] | 276 |
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[b5c5684] | 277 | template< typename T >
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| 278 | bool isCharType( T t ) {
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| 279 | if ( BasicType * bt = dynamic_cast< BasicType * >( t ) ) {
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| 280 | return bt->get_kind() == BasicType::Char || bt->get_kind() == BasicType::SignedChar ||
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| 281 | bt->get_kind() == BasicType::UnsignedChar;
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| 282 | }
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| 283 | return false;
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| 284 | }
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| 285 |
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[a32b204] | 286 | void Resolver::visit( SingleInit *singleInit ) {
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| 287 | if ( singleInit->get_value() ) {
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[bdd516a] | 288 | #if 0
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[a32b204] | 289 | if (NameExpr * ne = dynamic_cast<NameExpr*>(singleInit->get_value())) {
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| 290 | string n = ne->get_name();
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| 291 | if (n == "0") {
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| 292 | initContext = new BasicType(Type::Qualifiers(),
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| 293 | BasicType::SignedInt);
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| 294 | } else {
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| 295 | DeclarationWithType * decl = lookupId(n);
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| 296 | initContext = decl->get_type();
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| 297 | }
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| 298 | } else if (ConstantExpr * e =
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| 299 | dynamic_cast<ConstantExpr*>(singleInit->get_value())) {
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| 300 | Constant *c = e->get_constant();
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| 301 | initContext = c->get_type();
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| 302 | } else {
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| 303 | assert(0);
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| 304 | }
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[bdd516a] | 305 | #endif
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[a32b204] | 306 | CastExpr *castExpr = new CastExpr( singleInit->get_value(), initContext->clone() );
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| 307 | Expression *newExpr = findSingleExpression( castExpr, *this );
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| 308 | delete castExpr;
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| 309 | singleInit->set_value( newExpr );
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[b5c5684] | 310 |
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| 311 | // check if initializing type is char[]
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| 312 | if ( ArrayType * at = dynamic_cast< ArrayType * >( initContext ) ) {
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| 313 | if ( isCharType( at->get_base() ) ) {
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| 314 | // check if the resolved type is char *
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| 315 | if ( PointerType * pt = dynamic_cast< PointerType *>( newExpr->get_results().front() ) ) {
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| 316 | if ( isCharType( pt->get_base() ) ) {
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| 317 | // strip cast if we're initializing a char[] with a char *, e.g.
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| 318 | // char x[] = "hello";
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| 319 | CastExpr *ce = dynamic_cast< CastExpr * >( newExpr );
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| 320 | singleInit->set_value( ce->get_arg() );
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| 321 | ce->set_arg( NULL );
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| 322 | delete ce;
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| 323 | }
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| 324 | }
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| 325 | }
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| 326 | }
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[a32b204] | 327 | } // if
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[6c3744e] | 328 | // singleInit->get_value()->accept( *this );
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[a32b204] | 329 | }
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[51b73452] | 330 |
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[a32b204] | 331 | void Resolver::visit( ListInit *listInit ) {
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[b5c5684] | 332 | if ( ArrayType * at = dynamic_cast< ArrayType * >( initContext ) ) {
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| 333 | std::list< Initializer * >::iterator iter( listInit->begin_initializers() );
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| 334 | for ( ; iter != listInit->end_initializers(); ++iter ) {
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| 335 | initContext = at->get_base();
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| 336 | (*iter)->accept( *this );
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| 337 | } // for
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| 338 | } else if ( UnionInstType *st = dynamic_cast< UnionInstType * >( initContext ) ) {
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| 339 | DeclarationWithType *dt = dynamic_cast< DeclarationWithType * >( *st->get_baseUnion()->get_members().begin() );
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| 340 | initContext = dt->get_type();
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| 341 | (*listInit->begin_initializers())->accept( *this );
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| 342 | } else {
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| 343 | // basic types are handled here
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| 344 | Visitor::visit( listInit );
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| 345 | }
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| 346 |
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[bdd516a] | 347 | #if 0
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[a32b204] | 348 | if ( ArrayType *at = dynamic_cast<ArrayType*>(initContext) ) {
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| 349 | std::list<Initializer *>::iterator iter( listInit->begin_initializers() );
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| 350 | for ( ; iter != listInit->end_initializers(); ++iter ) {
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| 351 | initContext = at->get_base();
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| 352 | (*iter)->accept( *this );
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| 353 | } // for
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| 354 | } else if ( StructInstType *st = dynamic_cast<StructInstType*>(initContext) ) {
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| 355 | StructDecl *baseStruct = st->get_baseStruct();
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| 356 | std::list<Declaration *>::iterator iter1( baseStruct->get_members().begin() );
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| 357 | std::list<Initializer *>::iterator iter2( listInit->begin_initializers() );
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| 358 | for ( ; iter1 != baseStruct->get_members().end() && iter2 != listInit->end_initializers(); ++iter2 ) {
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| 359 | if ( (*iter2)->get_designators().empty() ) {
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| 360 | DeclarationWithType *dt = dynamic_cast<DeclarationWithType *>( *iter1 );
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| 361 | initContext = dt->get_type();
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| 362 | (*iter2)->accept( *this );
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| 363 | ++iter1;
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| 364 | } else {
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| 365 | StructDecl *st = baseStruct;
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| 366 | iter1 = st->get_members().begin();
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| 367 | std::list<Expression *>::iterator iter3( (*iter2)->get_designators().begin() );
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| 368 | for ( ; iter3 != (*iter2)->get_designators().end(); ++iter3 ) {
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| 369 | NameExpr *key = dynamic_cast<NameExpr *>( *iter3 );
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| 370 | assert( key );
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| 371 | for ( ; iter1 != st->get_members().end(); ++iter1 ) {
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| 372 | if ( key->get_name() == (*iter1)->get_name() ) {
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| 373 | (*iter1)->print( cout );
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| 374 | cout << key->get_name() << endl;
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| 375 | ObjectDecl *fred = dynamic_cast<ObjectDecl *>( *iter1 );
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| 376 | assert( fred );
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| 377 | StructInstType *mary = dynamic_cast<StructInstType*>( fred->get_type() );
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| 378 | assert( mary );
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| 379 | st = mary->get_baseStruct();
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| 380 | iter1 = st->get_members().begin();
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| 381 | break;
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| 382 | } // if
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| 383 | } // for
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| 384 | } // for
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| 385 | ObjectDecl *fred = dynamic_cast<ObjectDecl *>( *iter1 );
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| 386 | assert( fred );
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| 387 | initContext = fred->get_type();
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| 388 | (*listInit->begin_initializers())->accept( *this );
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| 389 | } // if
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| 390 | } // for
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| 391 | } else if ( UnionInstType *st = dynamic_cast<UnionInstType*>(initContext) ) {
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| 392 | DeclarationWithType *dt = dynamic_cast<DeclarationWithType *>( *st->get_baseUnion()->get_members().begin() );
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| 393 | initContext = dt->get_type();
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| 394 | (*listInit->begin_initializers())->accept( *this );
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[2c2242c] | 395 | } // if
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[bdd516a] | 396 | #endif
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[a32b204] | 397 | }
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[51b73452] | 398 | } // namespace ResolvExpr
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[a32b204] | 399 |
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| 400 | // Local Variables: //
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| 401 | // tab-width: 4 //
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| 402 | // mode: c++ //
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| 403 | // compile-command: "make install" //
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| 404 | // End: //
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