[51b7345] | 1 | #include "Resolver.h" |
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| 2 | #include "AlternativeFinder.h" |
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| 3 | #include "Alternative.h" |
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| 4 | #include "RenameVars.h" |
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| 5 | #include "ResolveTypeof.h" |
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| 6 | #include "SynTree/Statement.h" |
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| 7 | #include "SynTree/Type.h" |
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| 8 | #include "SynTree/Expression.h" |
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| 9 | #include "SynTree/Initializer.h" |
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| 10 | #include "SymTab/Indexer.h" |
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| 11 | #include "utility.h" |
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| 12 | |
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[d9a0e76] | 13 | #include <iostream> |
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| 14 | using namespace std; |
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[51b7345] | 15 | |
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[d9a0e76] | 16 | namespace ResolvExpr { |
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| 17 | class Resolver : public SymTab::Indexer { |
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| 18 | public: |
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| 19 | Resolver() : SymTab::Indexer( false ), switchType( 0 ) {} |
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[51b7345] | 20 | |
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[d9a0e76] | 21 | virtual void visit( FunctionDecl *functionDecl ); |
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| 22 | virtual void visit( ObjectDecl *functionDecl ); |
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| 23 | virtual void visit( TypeDecl *typeDecl ); |
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| 24 | |
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| 25 | virtual void visit( ExprStmt *exprStmt ); |
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| 26 | virtual void visit( IfStmt *ifStmt ); |
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| 27 | virtual void visit( WhileStmt *whileStmt ); |
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| 28 | virtual void visit( ForStmt *forStmt ); |
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| 29 | virtual void visit( SwitchStmt *switchStmt ); |
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| 30 | virtual void visit( ChooseStmt *switchStmt ); |
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| 31 | virtual void visit( CaseStmt *caseStmt ); |
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| 32 | virtual void visit( ReturnStmt *returnStmt ); |
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| 33 | |
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| 34 | virtual void visit( SingleInit *singleInit ); |
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| 35 | virtual void visit( ListInit *listInit ); |
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| 36 | private: |
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| 37 | std::list< Type * > functionReturn; |
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| 38 | Type *initContext; |
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| 39 | Type *switchType; |
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| 40 | }; |
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| 41 | |
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| 42 | void resolve( std::list< Declaration * > translationUnit ) { |
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| 43 | Resolver resolver; |
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| 44 | acceptAll( translationUnit, resolver ); |
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| 45 | #if 0 |
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| 46 | for ( std::list< Declaration * >::iterator i = translationUnit.begin(); i != translationUnit.end(); ++i ) { |
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| 47 | (*i)->print( std::cerr ); |
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| 48 | (*i)->accept( resolver ); |
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[17cd4eb] | 49 | } // for |
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[d9a0e76] | 50 | #endif |
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| 51 | } |
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[51b7345] | 52 | |
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[d9a0e76] | 53 | Expression *resolveInVoidContext( Expression *expr, const SymTab::Indexer &indexer ) { |
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| 54 | TypeEnvironment env; |
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| 55 | return resolveInVoidContext( expr, indexer, env ); |
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| 56 | } |
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[51b7345] | 57 | |
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[d9a0e76] | 58 | namespace { |
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| 59 | void finishExpr( Expression *expr, const TypeEnvironment &env ) { |
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| 60 | expr->set_env( new TypeSubstitution ); |
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| 61 | env.makeSubstitution( *expr->get_env() ); |
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| 62 | } |
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| 63 | |
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| 64 | Expression *findVoidExpression( Expression *untyped, const SymTab::Indexer &indexer ) { |
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| 65 | global_renamer.reset(); |
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| 66 | TypeEnvironment env; |
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| 67 | Expression *newExpr = resolveInVoidContext( untyped, indexer, env ); |
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| 68 | finishExpr( newExpr, env ); |
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| 69 | return newExpr; |
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| 70 | } |
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[51b7345] | 71 | |
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[d9a0e76] | 72 | Expression *findSingleExpression( Expression *untyped, const SymTab::Indexer &indexer ) { |
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| 73 | TypeEnvironment env; |
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| 74 | AlternativeFinder finder( indexer, env ); |
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| 75 | finder.find( untyped ); |
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| 76 | #if 0 |
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| 77 | if ( finder.get_alternatives().size() != 1 ) { |
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| 78 | std::cout << "untyped expr is "; |
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| 79 | untyped->print( std::cout ); |
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| 80 | std::cout << std::endl << "alternatives are:"; |
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| 81 | for ( std::list< Alternative >::const_iterator i = finder.get_alternatives().begin(); i != finder.get_alternatives().end(); ++i ) { |
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| 82 | i->print( std::cout ); |
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[17cd4eb] | 83 | } // for |
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| 84 | } // if |
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[d9a0e76] | 85 | #endif |
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| 86 | assert( finder.get_alternatives().size() == 1 ); |
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| 87 | Alternative &choice = finder.get_alternatives().front(); |
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| 88 | Expression *newExpr = choice.expr->clone(); |
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| 89 | finishExpr( newExpr, choice.env ); |
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| 90 | return newExpr; |
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| 91 | } |
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| 92 | |
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| 93 | bool isIntegralType( Type *type ) { |
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| 94 | if ( dynamic_cast< EnumInstType * >( type ) ) { |
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| 95 | return true; |
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| 96 | } else if ( BasicType *bt = dynamic_cast< BasicType * >( type ) ) { |
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| 97 | return bt->isInteger(); |
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| 98 | } else { |
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| 99 | return true; |
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[17cd4eb] | 100 | } // if |
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[d9a0e76] | 101 | } |
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[51b7345] | 102 | |
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[d9a0e76] | 103 | Expression *findIntegralExpression( Expression *untyped, const SymTab::Indexer &indexer ) { |
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| 104 | TypeEnvironment env; |
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| 105 | AlternativeFinder finder( indexer, env ); |
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| 106 | finder.find( untyped ); |
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| 107 | #if 0 |
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| 108 | if ( finder.get_alternatives().size() != 1 ) { |
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| 109 | std::cout << "untyped expr is "; |
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| 110 | untyped->print( std::cout ); |
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| 111 | std::cout << std::endl << "alternatives are:"; |
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| 112 | for ( std::list< Alternative >::const_iterator i = finder.get_alternatives().begin(); i != finder.get_alternatives().end(); ++i ) { |
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| 113 | i->print( std::cout ); |
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[17cd4eb] | 114 | } // for |
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| 115 | } // if |
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[d9a0e76] | 116 | #endif |
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| 117 | Expression *newExpr = 0; |
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| 118 | const TypeEnvironment *newEnv = 0; |
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| 119 | for ( AltList::const_iterator i = finder.get_alternatives().begin(); i != finder.get_alternatives().end(); ++i ) { |
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| 120 | if ( i->expr->get_results().size() == 1 && isIntegralType( i->expr->get_results().front() ) ) { |
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| 121 | if ( newExpr ) { |
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| 122 | throw SemanticError( "Too many interpretations for switch control expression", untyped ); |
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| 123 | } else { |
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| 124 | newExpr = i->expr->clone(); |
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| 125 | newEnv = &i->env; |
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[17cd4eb] | 126 | } // if |
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| 127 | } // if |
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| 128 | } // for |
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[d9a0e76] | 129 | if ( !newExpr ) { |
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| 130 | throw SemanticError( "Too many interpretations for switch control expression", untyped ); |
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[17cd4eb] | 131 | } // if |
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[d9a0e76] | 132 | finishExpr( newExpr, *newEnv ); |
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| 133 | return newExpr; |
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| 134 | } |
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[51b7345] | 135 | |
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[d9a0e76] | 136 | } |
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[51b7345] | 137 | |
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[d9a0e76] | 138 | void Resolver::visit( ObjectDecl *objectDecl ) { |
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| 139 | Type *new_type = resolveTypeof( objectDecl->get_type(), *this ); |
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| 140 | objectDecl->set_type( new_type ); |
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| 141 | initContext = new_type; |
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| 142 | SymTab::Indexer::visit( objectDecl ); |
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| 143 | } |
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[51b7345] | 144 | |
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[d9a0e76] | 145 | void Resolver::visit( TypeDecl *typeDecl ) { |
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| 146 | if ( typeDecl->get_base() ) { |
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| 147 | Type *new_type = resolveTypeof( typeDecl->get_base(), *this ); |
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| 148 | typeDecl->set_base( new_type ); |
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[17cd4eb] | 149 | } // if |
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[d9a0e76] | 150 | SymTab::Indexer::visit( typeDecl ); |
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| 151 | } |
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[51b7345] | 152 | |
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[d9a0e76] | 153 | void Resolver::visit( FunctionDecl *functionDecl ) { |
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| 154 | #if 0 |
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| 155 | std::cout << "resolver visiting functiondecl "; |
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| 156 | functionDecl->print( std::cout ); |
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| 157 | std::cout << std::endl; |
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| 158 | #endif |
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| 159 | Type *new_type = resolveTypeof( functionDecl->get_type(), *this ); |
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| 160 | functionDecl->set_type( new_type ); |
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| 161 | std::list< Type * > oldFunctionReturn = functionReturn; |
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| 162 | functionReturn.clear(); |
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| 163 | 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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| 164 | functionReturn.push_back( (*i)->get_type() ); |
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[17cd4eb] | 165 | } // for |
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[d9a0e76] | 166 | SymTab::Indexer::visit( functionDecl ); |
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| 167 | functionReturn = oldFunctionReturn; |
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| 168 | } |
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[51b7345] | 169 | |
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[d9a0e76] | 170 | void Resolver::visit( ExprStmt *exprStmt ) { |
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| 171 | if ( exprStmt->get_expr() ) { |
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| 172 | Expression *newExpr = findVoidExpression( exprStmt->get_expr(), *this ); |
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| 173 | delete exprStmt->get_expr(); |
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| 174 | exprStmt->set_expr( newExpr ); |
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[17cd4eb] | 175 | } // if |
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[d9a0e76] | 176 | } |
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[51b7345] | 177 | |
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[d9a0e76] | 178 | void Resolver::visit( IfStmt *ifStmt ) { |
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| 179 | Expression *newExpr = findSingleExpression( ifStmt->get_condition(), *this ); |
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| 180 | delete ifStmt->get_condition(); |
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| 181 | ifStmt->set_condition( newExpr ); |
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| 182 | Visitor::visit( ifStmt ); |
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| 183 | } |
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[51b7345] | 184 | |
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[d9a0e76] | 185 | void Resolver::visit( WhileStmt *whileStmt ) { |
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| 186 | Expression *newExpr = findSingleExpression( whileStmt->get_condition(), *this ); |
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| 187 | delete whileStmt->get_condition(); |
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| 188 | whileStmt->set_condition( newExpr ); |
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| 189 | Visitor::visit( whileStmt ); |
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| 190 | } |
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[51b7345] | 191 | |
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[d9a0e76] | 192 | void Resolver::visit( ForStmt *forStmt ) { |
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| 193 | Expression *newExpr; |
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| 194 | if ( forStmt->get_condition() ) { |
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| 195 | newExpr = findSingleExpression( forStmt->get_condition(), *this ); |
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| 196 | delete forStmt->get_condition(); |
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| 197 | forStmt->set_condition( newExpr ); |
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[17cd4eb] | 198 | } // if |
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[51b7345] | 199 | |
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[d9a0e76] | 200 | if ( forStmt->get_increment() ) { |
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| 201 | newExpr = findVoidExpression( forStmt->get_increment(), *this ); |
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| 202 | delete forStmt->get_increment(); |
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| 203 | forStmt->set_increment( newExpr ); |
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[17cd4eb] | 204 | } // if |
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[51b7345] | 205 | |
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[d9a0e76] | 206 | Visitor::visit( forStmt ); |
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| 207 | } |
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[51b7345] | 208 | |
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[d9a0e76] | 209 | template< typename SwitchClass > |
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| 210 | void handleSwitchStmt( SwitchClass *switchStmt, SymTab::Indexer &visitor ) { |
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| 211 | Expression *newExpr; |
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| 212 | newExpr = findIntegralExpression( switchStmt->get_condition(), visitor ); |
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| 213 | delete switchStmt->get_condition(); |
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| 214 | switchStmt->set_condition( newExpr ); |
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[51b7345] | 215 | |
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[d9a0e76] | 216 | visitor.Visitor::visit( switchStmt ); |
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| 217 | } |
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[51b7345] | 218 | |
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[d9a0e76] | 219 | void Resolver::visit( SwitchStmt *switchStmt ) { |
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| 220 | handleSwitchStmt( switchStmt, *this ); |
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| 221 | } |
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[51b7345] | 222 | |
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[d9a0e76] | 223 | void Resolver::visit( ChooseStmt *switchStmt ) { |
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| 224 | handleSwitchStmt( switchStmt, *this ); |
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| 225 | } |
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[51b7345] | 226 | |
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[d9a0e76] | 227 | void Resolver::visit( CaseStmt *caseStmt ) { |
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| 228 | Visitor::visit( caseStmt ); |
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| 229 | } |
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[51b7345] | 230 | |
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[d9a0e76] | 231 | void Resolver::visit( ReturnStmt *returnStmt ) { |
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| 232 | if ( returnStmt->get_expr() ) { |
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| 233 | CastExpr *castExpr = new CastExpr( returnStmt->get_expr() ); |
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| 234 | cloneAll( functionReturn, castExpr->get_results() ); |
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| 235 | Expression *newExpr = findSingleExpression( castExpr, *this ); |
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| 236 | delete castExpr; |
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| 237 | returnStmt->set_expr( newExpr ); |
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[17cd4eb] | 238 | } // if |
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[d9a0e76] | 239 | } |
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[51b7345] | 240 | |
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[d9a0e76] | 241 | void Resolver::visit( SingleInit *singleInit ) { |
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[17cd4eb] | 242 | if ( singleInit->get_value() ) { |
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| 243 | CastExpr *castExpr = new CastExpr( singleInit->get_value(), initContext->clone() ); |
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| 244 | Expression *newExpr = findSingleExpression( castExpr, *this ); |
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| 245 | delete castExpr; |
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| 246 | singleInit->set_value( newExpr ); |
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| 247 | } // if |
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[6c3744e] | 248 | // singleInit->get_value()->accept( *this ); |
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[d9a0e76] | 249 | } |
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[51b7345] | 250 | |
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[d9a0e76] | 251 | void Resolver::visit( ListInit *listInit ) { |
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[6c3744e] | 252 | if ( ArrayType *at = dynamic_cast<ArrayType*>(initContext) ) { |
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| 253 | initContext = at->get_base(); |
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| 254 | Visitor::visit( listInit ); |
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| 255 | } else if ( StructInstType *st = dynamic_cast<StructInstType*>(initContext) ) { |
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| 256 | StructDecl *baseStruct = st->get_baseStruct(); |
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| 257 | std::list<Declaration *>::iterator iter1( baseStruct->get_members().begin() ); |
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| 258 | std::list<Initializer *>::iterator iter2( listInit->begin_initializers() ); |
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| 259 | for ( ; iter1 != baseStruct->get_members().end() && iter2 != listInit->end_initializers() ; ++iter1, ++iter2 ) { |
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| 260 | DeclarationWithType *dt = dynamic_cast<DeclarationWithType *>( *iter1 ); |
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| 261 | initContext = dt->get_type(); |
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| 262 | (*iter2)->accept( *this ); |
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| 263 | } |
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| 264 | } else if ( UnionInstType *st = dynamic_cast<UnionInstType*>(initContext) ) { |
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| 265 | DeclarationWithType *dt = dynamic_cast<DeclarationWithType *>( *st->get_baseUnion()->get_members().begin() ); |
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| 266 | initContext = dt->get_type(); |
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| 267 | (*listInit->begin_initializers())->accept( *this ); |
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| 268 | } // if |
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[d9a0e76] | 269 | } |
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[51b7345] | 270 | } // namespace ResolvExpr |
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