[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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[71f4e4f] | 7 | // Resolver.cc -- |
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[a32b204] | 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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[cbce272] | 11 | // Last Modified By : Andrew Beach |
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| 12 | // Last Modified On : Tus Aug 8 16:06:00 2017 |
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| 13 | // Update Count : 212 |
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[a32b204] | 14 | // |
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| 15 | |
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[e4d829b] | 16 | #include <iostream> |
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| 17 | |
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[51b7345] | 18 | #include "Alternative.h" |
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[e4d829b] | 19 | #include "AlternativeFinder.h" |
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| 20 | #include "CurrentObject.h" |
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[51b7345] | 21 | #include "RenameVars.h" |
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[e4d829b] | 22 | #include "Resolver.h" |
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[51b7345] | 23 | #include "ResolveTypeof.h" |
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[906e24d] | 24 | #include "typeops.h" |
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[e4d829b] | 25 | |
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[51b7345] | 26 | #include "SynTree/Expression.h" |
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| 27 | #include "SynTree/Initializer.h" |
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[e4d829b] | 28 | #include "SynTree/Statement.h" |
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| 29 | #include "SynTree/Type.h" |
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| 30 | |
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[5f98ce5] | 31 | #include "SymTab/Autogen.h" |
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[e4d829b] | 32 | #include "SymTab/Indexer.h" |
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| 33 | |
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[d3b7937] | 34 | #include "Common/utility.h" |
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[e4d829b] | 35 | |
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[7b3f66b] | 36 | #include "InitTweak/InitTweak.h" |
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[51b7345] | 37 | |
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[d9a0e76] | 38 | using namespace std; |
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[51b7345] | 39 | |
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[d9a0e76] | 40 | namespace ResolvExpr { |
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[62e5546] | 41 | class Resolver final : public SymTab::Indexer { |
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[a32b204] | 42 | public: |
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[77971f6] | 43 | Resolver() : SymTab::Indexer( false ) {} |
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[1d2b64f] | 44 | Resolver( const SymTab:: Indexer & other ) : SymTab::Indexer( other ) { |
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| 45 | if ( const Resolver * res = dynamic_cast< const Resolver * >( &other ) ) { |
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| 46 | functionReturn = res->functionReturn; |
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[e4d829b] | 47 | currentObject = res->currentObject; |
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[1d2b64f] | 48 | inEnumDecl = res->inEnumDecl; |
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| 49 | } |
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| 50 | } |
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[71f4e4f] | 51 | |
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[1d2b64f] | 52 | typedef SymTab::Indexer Parent; |
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| 53 | using Parent::visit; |
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[62e5546] | 54 | virtual void visit( FunctionDecl *functionDecl ) override; |
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| 55 | virtual void visit( ObjectDecl *functionDecl ) override; |
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| 56 | virtual void visit( TypeDecl *typeDecl ) override; |
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| 57 | virtual void visit( EnumDecl * enumDecl ) override; |
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[94b4364] | 58 | |
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[62e5546] | 59 | virtual void visit( ArrayType * at ) override; |
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| 60 | virtual void visit( PointerType * at ) override; |
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[d9a0e76] | 61 | |
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[62e5546] | 62 | virtual void visit( ExprStmt *exprStmt ) override; |
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| 63 | virtual void visit( AsmExpr *asmExpr ) override; |
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| 64 | virtual void visit( AsmStmt *asmStmt ) override; |
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| 65 | virtual void visit( IfStmt *ifStmt ) override; |
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| 66 | virtual void visit( WhileStmt *whileStmt ) override; |
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| 67 | virtual void visit( ForStmt *forStmt ) override; |
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| 68 | virtual void visit( SwitchStmt *switchStmt ) override; |
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| 69 | virtual void visit( CaseStmt *caseStmt ) override; |
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| 70 | virtual void visit( BranchStmt *branchStmt ) override; |
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| 71 | virtual void visit( ReturnStmt *returnStmt ) override; |
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[307a732] | 72 | virtual void visit( ThrowStmt *throwStmt ) override; |
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[cbce272] | 73 | virtual void visit( CatchStmt *catchStmt ) override; |
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[d9a0e76] | 74 | |
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[62e5546] | 75 | virtual void visit( SingleInit *singleInit ) override; |
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| 76 | virtual void visit( ListInit *listInit ) override; |
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| 77 | virtual void visit( ConstructorInit *ctorInit ) override; |
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[a32b204] | 78 | private: |
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[94b4364] | 79 | typedef std::list< Initializer * >::iterator InitIterator; |
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| 80 | |
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[40e636a] | 81 | template< typename PtrType > |
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| 82 | void handlePtrType( PtrType * type ); |
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| 83 | |
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[30b65d8] | 84 | void resolveAggrInit( ReferenceToType *, InitIterator &, InitIterator & ); |
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| 85 | void resolveSingleAggrInit( Declaration *, InitIterator &, InitIterator &, TypeSubstitution sub ); |
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[f1e012b] | 86 | void fallbackInit( ConstructorInit * ctorInit ); |
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[b726084] | 87 | |
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[77971f6] | 88 | Type * functionReturn = nullptr; |
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[e4d829b] | 89 | CurrentObject currentObject = nullptr; |
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[a436947] | 90 | bool inEnumDecl = false; |
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[a32b204] | 91 | }; |
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[d9a0e76] | 92 | |
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[a32b204] | 93 | void resolve( std::list< Declaration * > translationUnit ) { |
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| 94 | Resolver resolver; |
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| 95 | acceptAll( translationUnit, resolver ); |
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[d9a0e76] | 96 | } |
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| 97 | |
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[a32b204] | 98 | Expression *resolveInVoidContext( Expression *expr, const SymTab::Indexer &indexer ) { |
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| 99 | TypeEnvironment env; |
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| 100 | return resolveInVoidContext( expr, indexer, env ); |
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[d9a0e76] | 101 | } |
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[a32b204] | 102 | |
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[db4ecc5] | 103 | |
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[a32b204] | 104 | namespace { |
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| 105 | void finishExpr( Expression *expr, const TypeEnvironment &env ) { |
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| 106 | expr->set_env( new TypeSubstitution ); |
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| 107 | env.makeSubstitution( *expr->get_env() ); |
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| 108 | } |
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[db4ecc5] | 109 | } // namespace |
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[a32b204] | 110 | |
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[db4ecc5] | 111 | Expression *findVoidExpression( Expression *untyped, const SymTab::Indexer &indexer ) { |
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| 112 | global_renamer.reset(); |
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| 113 | TypeEnvironment env; |
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| 114 | Expression *newExpr = resolveInVoidContext( untyped, indexer, env ); |
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| 115 | finishExpr( newExpr, env ); |
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| 116 | return newExpr; |
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| 117 | } |
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[71f4e4f] | 118 | |
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[db4ecc5] | 119 | namespace { |
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[a32b204] | 120 | Expression *findSingleExpression( 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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[0b150ec] | 134 | assertf( finder.get_alternatives().size() == 1, "findSingleExpression: must have exactly one alternative at the end." ); |
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[a32b204] | 135 | Alternative &choice = finder.get_alternatives().front(); |
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| 136 | Expression *newExpr = choice.expr->clone(); |
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| 137 | finishExpr( newExpr, choice.env ); |
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| 138 | return newExpr; |
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| 139 | } |
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[d9a0e76] | 140 | |
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[a32b204] | 141 | bool isIntegralType( Type *type ) { |
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| 142 | if ( dynamic_cast< EnumInstType * >( type ) ) { |
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| 143 | return true; |
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| 144 | } else if ( BasicType *bt = dynamic_cast< BasicType * >( type ) ) { |
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| 145 | return bt->isInteger(); |
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[89e6ffc] | 146 | } else if ( dynamic_cast< ZeroType* >( type ) != nullptr || dynamic_cast< OneType* >( type ) != nullptr ) { |
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| 147 | return true; |
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[a32b204] | 148 | } else { |
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| 149 | return false; |
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| 150 | } // if |
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| 151 | } |
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[71f4e4f] | 152 | |
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[a32b204] | 153 | Expression *findIntegralExpression( Expression *untyped, const SymTab::Indexer &indexer ) { |
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| 154 | TypeEnvironment env; |
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| 155 | AlternativeFinder finder( indexer, env ); |
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| 156 | finder.find( untyped ); |
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[d9a0e76] | 157 | #if 0 |
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[a32b204] | 158 | if ( finder.get_alternatives().size() != 1 ) { |
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| 159 | std::cout << "untyped expr is "; |
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| 160 | untyped->print( std::cout ); |
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| 161 | std::cout << std::endl << "alternatives are:"; |
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| 162 | for ( std::list< Alternative >::const_iterator i = finder.get_alternatives().begin(); i != finder.get_alternatives().end(); ++i ) { |
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| 163 | i->print( std::cout ); |
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| 164 | } // for |
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| 165 | } // if |
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[d9a0e76] | 166 | #endif |
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[a32b204] | 167 | Expression *newExpr = 0; |
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| 168 | const TypeEnvironment *newEnv = 0; |
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| 169 | for ( AltList::const_iterator i = finder.get_alternatives().begin(); i != finder.get_alternatives().end(); ++i ) { |
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[906e24d] | 170 | if ( i->expr->get_result()->size() == 1 && isIntegralType( i->expr->get_result() ) ) { |
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[a32b204] | 171 | if ( newExpr ) { |
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| 172 | throw SemanticError( "Too many interpretations for case control expression", untyped ); |
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| 173 | } else { |
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| 174 | newExpr = i->expr->clone(); |
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| 175 | newEnv = &i->env; |
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| 176 | } // if |
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| 177 | } // if |
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| 178 | } // for |
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| 179 | if ( ! newExpr ) { |
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| 180 | throw SemanticError( "No interpretations for case control expression", untyped ); |
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| 181 | } // if |
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| 182 | finishExpr( newExpr, *newEnv ); |
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| 183 | return newExpr; |
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| 184 | } |
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[71f4e4f] | 185 | |
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[a32b204] | 186 | } |
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[71f4e4f] | 187 | |
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[a32b204] | 188 | void Resolver::visit( ObjectDecl *objectDecl ) { |
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| 189 | Type *new_type = resolveTypeof( objectDecl->get_type(), *this ); |
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| 190 | objectDecl->set_type( new_type ); |
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[3cfe27f] | 191 | // To handle initialization of routine pointers, e.g., int (*fp)(int) = foo(), means that class-variable |
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| 192 | // initContext is changed multiple time because the LHS is analysed twice. The second analysis changes |
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| 193 | // initContext because of a function type can contain object declarations in the return and parameter types. So |
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| 194 | // each value of initContext is retained, so the type on the first analysis is preserved and used for selecting |
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| 195 | // the RHS. |
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[e4d829b] | 196 | ValueGuard<CurrentObject> temp( currentObject ); |
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| 197 | currentObject = CurrentObject( objectDecl->get_type() ); |
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| 198 | if ( inEnumDecl && dynamic_cast< EnumInstType * >( objectDecl->get_type() ) ) { |
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[a436947] | 199 | // enumerator initializers should not use the enum type to initialize, since |
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| 200 | // the enum type is still incomplete at this point. Use signed int instead. |
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[e4d829b] | 201 | currentObject = CurrentObject( new BasicType( Type::Qualifiers(), BasicType::SignedInt ) ); |
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[a436947] | 202 | } |
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[1d2b64f] | 203 | Parent::visit( objectDecl ); |
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[e4d829b] | 204 | if ( inEnumDecl && dynamic_cast< EnumInstType * >( objectDecl->get_type() ) ) { |
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[a436947] | 205 | // delete newly created signed int type |
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[e4d829b] | 206 | // delete currentObject.getType(); |
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[a436947] | 207 | } |
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[bfbf97f] | 208 | } |
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| 209 | |
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[40e636a] | 210 | template< typename PtrType > |
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| 211 | void Resolver::handlePtrType( PtrType * type ) { |
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| 212 | if ( type->get_dimension() ) { |
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| 213 | CastExpr *castExpr = new CastExpr( type->get_dimension(), SymTab::SizeType->clone() ); |
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[bfbf97f] | 214 | Expression *newExpr = findSingleExpression( castExpr, *this ); |
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[40e636a] | 215 | delete type->get_dimension(); |
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| 216 | type->set_dimension( newExpr ); |
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[d1d17f5] | 217 | } |
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[40e636a] | 218 | } |
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| 219 | |
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| 220 | void Resolver::visit( ArrayType * at ) { |
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| 221 | handlePtrType( at ); |
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[1d2b64f] | 222 | Parent::visit( at ); |
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[a32b204] | 223 | } |
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[94b4364] | 224 | |
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[40e636a] | 225 | void Resolver::visit( PointerType * pt ) { |
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| 226 | handlePtrType( pt ); |
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[1d2b64f] | 227 | Parent::visit( pt ); |
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[40e636a] | 228 | } |
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| 229 | |
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[a32b204] | 230 | void Resolver::visit( TypeDecl *typeDecl ) { |
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| 231 | if ( typeDecl->get_base() ) { |
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| 232 | Type *new_type = resolveTypeof( typeDecl->get_base(), *this ); |
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| 233 | typeDecl->set_base( new_type ); |
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| 234 | } // if |
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[1d2b64f] | 235 | Parent::visit( typeDecl ); |
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[a32b204] | 236 | } |
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[94b4364] | 237 | |
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[a32b204] | 238 | void Resolver::visit( FunctionDecl *functionDecl ) { |
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[d9a0e76] | 239 | #if 0 |
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[a32b204] | 240 | std::cout << "resolver visiting functiondecl "; |
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| 241 | functionDecl->print( std::cout ); |
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| 242 | std::cout << std::endl; |
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[d9a0e76] | 243 | #endif |
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[a32b204] | 244 | Type *new_type = resolveTypeof( functionDecl->get_type(), *this ); |
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| 245 | functionDecl->set_type( new_type ); |
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[906e24d] | 246 | ValueGuard< Type * > oldFunctionReturn( functionReturn ); |
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| 247 | functionReturn = ResolvExpr::extractResultType( functionDecl->get_functionType() ); |
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[1d2b64f] | 248 | Parent::visit( functionDecl ); |
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[88d1066] | 249 | |
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| 250 | // default value expressions have an environment which shouldn't be there and trips up later passes. |
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| 251 | // xxx - it might be necessary to somehow keep the information from this environment, but I can't currently |
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| 252 | // see how it's useful. |
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| 253 | for ( Declaration * d : functionDecl->get_functionType()->get_parameters() ) { |
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| 254 | if ( ObjectDecl * obj = dynamic_cast< ObjectDecl * >( d ) ) { |
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| 255 | if ( SingleInit * init = dynamic_cast< SingleInit * >( obj->get_init() ) ) { |
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| 256 | delete init->get_value()->get_env(); |
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| 257 | init->get_value()->set_env( nullptr ); |
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| 258 | } |
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| 259 | } |
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| 260 | } |
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[a32b204] | 261 | } |
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[51b7345] | 262 | |
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[a436947] | 263 | void Resolver::visit( EnumDecl * enumDecl ) { |
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| 264 | // in case we decide to allow nested enums |
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[1d2b64f] | 265 | ValueGuard< bool > oldInEnumDecl( inEnumDecl ); |
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[a436947] | 266 | inEnumDecl = true; |
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[1d2b64f] | 267 | Parent::visit( enumDecl ); |
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[a436947] | 268 | } |
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| 269 | |
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[a32b204] | 270 | void Resolver::visit( ExprStmt *exprStmt ) { |
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[1d2b64f] | 271 | assertf( exprStmt->get_expr(), "ExprStmt has null Expression in resolver" ); |
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| 272 | Expression *newExpr = findVoidExpression( exprStmt->get_expr(), *this ); |
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| 273 | delete exprStmt->get_expr(); |
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| 274 | exprStmt->set_expr( newExpr ); |
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[a32b204] | 275 | } |
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[51b7345] | 276 | |
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[7f5566b] | 277 | void Resolver::visit( AsmExpr *asmExpr ) { |
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| 278 | Expression *newExpr = findVoidExpression( asmExpr->get_operand(), *this ); |
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| 279 | delete asmExpr->get_operand(); |
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| 280 | asmExpr->set_operand( newExpr ); |
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| 281 | if ( asmExpr->get_inout() ) { |
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| 282 | newExpr = findVoidExpression( asmExpr->get_inout(), *this ); |
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| 283 | delete asmExpr->get_inout(); |
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| 284 | asmExpr->set_inout( newExpr ); |
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| 285 | } // if |
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| 286 | } |
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| 287 | |
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| 288 | void Resolver::visit( AsmStmt *asmStmt ) { |
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| 289 | acceptAll( asmStmt->get_input(), *this); |
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| 290 | acceptAll( asmStmt->get_output(), *this); |
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| 291 | } |
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| 292 | |
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[a32b204] | 293 | void Resolver::visit( IfStmt *ifStmt ) { |
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| 294 | Expression *newExpr = findSingleExpression( ifStmt->get_condition(), *this ); |
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| 295 | delete ifStmt->get_condition(); |
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| 296 | ifStmt->set_condition( newExpr ); |
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[1d2b64f] | 297 | Parent::visit( ifStmt ); |
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[a32b204] | 298 | } |
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[51b7345] | 299 | |
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[a32b204] | 300 | void Resolver::visit( WhileStmt *whileStmt ) { |
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| 301 | Expression *newExpr = findSingleExpression( whileStmt->get_condition(), *this ); |
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| 302 | delete whileStmt->get_condition(); |
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| 303 | whileStmt->set_condition( newExpr ); |
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[1d2b64f] | 304 | Parent::visit( whileStmt ); |
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[a32b204] | 305 | } |
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[51b7345] | 306 | |
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[a32b204] | 307 | void Resolver::visit( ForStmt *forStmt ) { |
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[1d2b64f] | 308 | Parent::visit( forStmt ); |
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[145f1fc] | 309 | |
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[a32b204] | 310 | if ( forStmt->get_condition() ) { |
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[145f1fc] | 311 | Expression * newExpr = findSingleExpression( forStmt->get_condition(), *this ); |
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[a32b204] | 312 | delete forStmt->get_condition(); |
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| 313 | forStmt->set_condition( newExpr ); |
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| 314 | } // if |
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[71f4e4f] | 315 | |
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[a32b204] | 316 | if ( forStmt->get_increment() ) { |
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[145f1fc] | 317 | Expression * newExpr = findVoidExpression( forStmt->get_increment(), *this ); |
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[a32b204] | 318 | delete forStmt->get_increment(); |
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| 319 | forStmt->set_increment( newExpr ); |
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| 320 | } // if |
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| 321 | } |
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[51b7345] | 322 | |
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[32b8144] | 323 | void Resolver::visit( SwitchStmt *switchStmt ) { |
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[e4d829b] | 324 | ValueGuard< CurrentObject > oldCurrentObject( currentObject ); |
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[a32b204] | 325 | Expression *newExpr; |
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[32b8144] | 326 | newExpr = findIntegralExpression( switchStmt->get_condition(), *this ); |
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[a32b204] | 327 | delete switchStmt->get_condition(); |
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| 328 | switchStmt->set_condition( newExpr ); |
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[71f4e4f] | 329 | |
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[e4d829b] | 330 | currentObject = CurrentObject( newExpr->get_result() ); |
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[32b8144] | 331 | Parent::visit( switchStmt ); |
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[a32b204] | 332 | } |
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[51b7345] | 333 | |
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[a32b204] | 334 | void Resolver::visit( CaseStmt *caseStmt ) { |
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[32b8144] | 335 | if ( caseStmt->get_condition() ) { |
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[e4d829b] | 336 | std::list< InitAlternative > initAlts = currentObject.getOptions(); |
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| 337 | assertf( initAlts.size() == 1, "SwitchStmt did not correctly resolve an integral expression." ); |
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| 338 | CastExpr * castExpr = new CastExpr( caseStmt->get_condition(), initAlts.front().type->clone() ); |
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[32b8144] | 339 | Expression * newExpr = findSingleExpression( castExpr, *this ); |
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| 340 | castExpr = safe_dynamic_cast< CastExpr * >( newExpr ); |
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| 341 | caseStmt->set_condition( castExpr->get_arg() ); |
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| 342 | castExpr->set_arg( nullptr ); |
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| 343 | delete castExpr; |
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| 344 | } |
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[1d2b64f] | 345 | Parent::visit( caseStmt ); |
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[a32b204] | 346 | } |
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[51b7345] | 347 | |
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[de62360d] | 348 | void Resolver::visit( BranchStmt *branchStmt ) { |
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| 349 | // must resolve the argument for a computed goto |
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| 350 | if ( branchStmt->get_type() == BranchStmt::Goto ) { // check for computed goto statement |
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[2871210] | 351 | if ( Expression * arg = branchStmt->get_computedTarget() ) { |
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[de62360d] | 352 | VoidType v = Type::Qualifiers(); // cast to void * for the alternative finder |
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| 353 | PointerType pt( Type::Qualifiers(), v.clone() ); |
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| 354 | CastExpr * castExpr = new CastExpr( arg, pt.clone() ); |
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| 355 | Expression * newExpr = findSingleExpression( castExpr, *this ); // find best expression |
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| 356 | branchStmt->set_target( newExpr ); |
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| 357 | } // if |
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| 358 | } // if |
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| 359 | } |
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| 360 | |
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[a32b204] | 361 | void Resolver::visit( ReturnStmt *returnStmt ) { |
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| 362 | if ( returnStmt->get_expr() ) { |
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[906e24d] | 363 | CastExpr *castExpr = new CastExpr( returnStmt->get_expr(), functionReturn->clone() ); |
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[a32b204] | 364 | Expression *newExpr = findSingleExpression( castExpr, *this ); |
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| 365 | delete castExpr; |
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| 366 | returnStmt->set_expr( newExpr ); |
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| 367 | } // if |
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| 368 | } |
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[51b7345] | 369 | |
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[307a732] | 370 | void Resolver::visit( ThrowStmt *throwStmt ) { |
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[cbce272] | 371 | // TODO: Replace *exception type with &exception type. |
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[307a732] | 372 | if ( throwStmt->get_expr() ) { |
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[cbce272] | 373 | StructDecl * exception_decl = |
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| 374 | lookupStruct( "__cfaehm__base_exception_t" ); |
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| 375 | assert( exception_decl ); |
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| 376 | Expression * wrapped = new CastExpr( |
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| 377 | throwStmt->get_expr(), |
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| 378 | new PointerType( |
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| 379 | noQualifiers, |
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| 380 | new StructInstType( |
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| 381 | noQualifiers, |
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| 382 | exception_decl |
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| 383 | ) |
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| 384 | ) |
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| 385 | ); |
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[307a732] | 386 | Expression * newExpr = findSingleExpression( wrapped, *this ); |
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| 387 | throwStmt->set_expr( newExpr ); |
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| 388 | } |
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| 389 | } |
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| 390 | |
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[cbce272] | 391 | void Resolver::visit( CatchStmt *catchStmt ) { |
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| 392 | if ( catchStmt->get_cond() ) { |
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| 393 | Expression * wrapped = new CastExpr( |
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| 394 | catchStmt->get_cond(), |
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| 395 | new BasicType( noQualifiers, BasicType::Bool ) |
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| 396 | ); |
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| 397 | catchStmt->set_cond( findSingleExpression( wrapped, *this ) ); |
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| 398 | } |
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| 399 | } |
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| 400 | |
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[b5c5684] | 401 | template< typename T > |
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| 402 | bool isCharType( T t ) { |
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| 403 | if ( BasicType * bt = dynamic_cast< BasicType * >( t ) ) { |
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[71f4e4f] | 404 | return bt->get_kind() == BasicType::Char || bt->get_kind() == BasicType::SignedChar || |
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[b5c5684] | 405 | bt->get_kind() == BasicType::UnsignedChar; |
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| 406 | } |
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| 407 | return false; |
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| 408 | } |
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| 409 | |
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[e4d829b] | 410 | void Resolver::visit( SingleInit *singleInit ) { |
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[62423350] | 411 | // resolve initialization using the possibilities as determined by the currentObject cursor |
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[e4d829b] | 412 | UntypedInitExpr * untyped = new UntypedInitExpr( singleInit->get_value(), currentObject.getOptions() ); |
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| 413 | Expression * newExpr = findSingleExpression( untyped, *this ); |
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| 414 | InitExpr * initExpr = safe_dynamic_cast< InitExpr * >( newExpr ); |
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[62423350] | 415 | |
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| 416 | // move cursor to the object that is actually initialized |
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[e4d829b] | 417 | currentObject.setNext( initExpr->get_designation() ); |
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[62423350] | 418 | |
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| 419 | // discard InitExpr wrapper and retain relevant pieces |
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| 420 | newExpr = initExpr->get_expr(); |
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[435e75f] | 421 | newExpr->set_env( initExpr->get_env() ); |
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[62423350] | 422 | initExpr->set_expr( nullptr ); |
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| 423 | initExpr->set_env( nullptr ); |
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[e4d829b] | 424 | delete initExpr; |
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| 425 | |
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[62423350] | 426 | // get the actual object's type (may not exactly match what comes back from the resolver due to conversions) |
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| 427 | Type * initContext = currentObject.getCurrentType(); |
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| 428 | |
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| 429 | // check if actual object's type is char[] |
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| 430 | if ( ArrayType * at = dynamic_cast< ArrayType * >( initContext ) ) { |
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| 431 | if ( isCharType( at->get_base() ) ) { |
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| 432 | // check if the resolved type is char * |
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| 433 | if ( PointerType * pt = dynamic_cast< PointerType *>( newExpr->get_result() ) ) { |
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| 434 | if ( isCharType( pt->get_base() ) ) { |
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| 435 | // strip cast if we're initializing a char[] with a char *, e.g. char x[] = "hello"; |
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| 436 | CastExpr *ce = safe_dynamic_cast< CastExpr * >( newExpr ); |
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| 437 | newExpr = ce->get_arg(); |
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| 438 | ce->set_arg( nullptr ); |
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| 439 | delete ce; |
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| 440 | } |
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| 441 | } |
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| 442 | } |
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| 443 | } |
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[94b4364] | 444 | |
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[62423350] | 445 | // set initializer expr to resolved express |
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| 446 | singleInit->set_value( newExpr ); |
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| 447 | |
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| 448 | // move cursor to next object in preparation for next initializer |
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| 449 | currentObject.increment(); |
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| 450 | } |
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[94b4364] | 451 | |
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| 452 | void Resolver::visit( ListInit * listInit ) { |
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[62423350] | 453 | // move cursor into brace-enclosed initializer-list |
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[e4d829b] | 454 | currentObject.enterListInit(); |
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| 455 | // xxx - fix this so that the list isn't copied, iterator should be used to change current element |
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| 456 | std::list<Designation *> newDesignations; |
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| 457 | for ( auto p : group_iterate(listInit->get_designations(), listInit->get_initializers()) ) { |
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[62423350] | 458 | // iterate designations and initializers in pairs, moving the cursor to the current designated object and resolving |
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| 459 | // the initializer against that object. |
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[e4d829b] | 460 | Designation * des = std::get<0>(p); |
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| 461 | Initializer * init = std::get<1>(p); |
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| 462 | newDesignations.push_back( currentObject.findNext( des ) ); |
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| 463 | init->accept( *this ); |
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[b5c5684] | 464 | } |
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[62423350] | 465 | // set the set of 'resolved' designations and leave the brace-enclosed initializer-list |
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[e4d829b] | 466 | listInit->get_designations() = newDesignations; // xxx - memory management |
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| 467 | currentObject.exitListInit(); |
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| 468 | |
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[62423350] | 469 | // xxx - this part has not be folded into CurrentObject yet |
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[e4d829b] | 470 | // } else if ( TypeInstType * tt = dynamic_cast< TypeInstType * >( initContext ) ) { |
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| 471 | // Type * base = tt->get_baseType()->get_base(); |
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| 472 | // if ( base ) { |
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| 473 | // // know the implementation type, so try using that as the initContext |
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| 474 | // ObjectDecl tmpObj( "", Type::StorageClasses(), LinkageSpec::Cforall, nullptr, base->clone(), nullptr ); |
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| 475 | // currentObject = &tmpObj; |
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| 476 | // visit( listInit ); |
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| 477 | // } else { |
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| 478 | // // missing implementation type -- might be an unknown type variable, so try proceeding with the current init context |
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| 479 | // Parent::visit( listInit ); |
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| 480 | // } |
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| 481 | // } else { |
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[a32b204] | 482 | } |
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[71f4e4f] | 483 | |
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[f1e012b] | 484 | // ConstructorInit - fall back on C-style initializer |
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| 485 | void Resolver::fallbackInit( ConstructorInit * ctorInit ) { |
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| 486 | // could not find valid constructor, or found an intrinsic constructor |
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| 487 | // fall back on C-style initializer |
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| 488 | delete ctorInit->get_ctor(); |
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| 489 | ctorInit->set_ctor( NULL ); |
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[71a145de] | 490 | delete ctorInit->get_dtor(); |
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| 491 | ctorInit->set_dtor( NULL ); |
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[f1e012b] | 492 | maybeAccept( ctorInit->get_init(), *this ); |
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| 493 | } |
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| 494 | |
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[1d2b64f] | 495 | // needs to be callable from outside the resolver, so this is a standalone function |
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| 496 | void resolveCtorInit( ConstructorInit * ctorInit, const SymTab::Indexer & indexer ) { |
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| 497 | assert( ctorInit ); |
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| 498 | Resolver resolver( indexer ); |
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| 499 | ctorInit->accept( resolver ); |
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| 500 | } |
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| 501 | |
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| 502 | void resolveStmtExpr( StmtExpr * stmtExpr, const SymTab::Indexer & indexer ) { |
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| 503 | assert( stmtExpr ); |
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| 504 | Resolver resolver( indexer ); |
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| 505 | stmtExpr->accept( resolver ); |
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| 506 | } |
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| 507 | |
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[71f4e4f] | 508 | void Resolver::visit( ConstructorInit *ctorInit ) { |
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[1ba88a0] | 509 | // xxx - fallback init has been removed => remove fallbackInit function and remove complexity from FixInit and remove C-init from ConstructorInit |
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| 510 | maybeAccept( ctorInit->get_ctor(), *this ); |
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| 511 | maybeAccept( ctorInit->get_dtor(), *this ); |
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[071a31a] | 512 | |
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[5b2f5bb] | 513 | // found a constructor - can get rid of C-style initializer |
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| 514 | delete ctorInit->get_init(); |
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| 515 | ctorInit->set_init( NULL ); |
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[ec79847] | 516 | |
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| 517 | // intrinsic single parameter constructors and destructors do nothing. Since this was |
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| 518 | // implicitly generated, there's no way for it to have side effects, so get rid of it |
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| 519 | // to clean up generated code. |
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[f9cebb5] | 520 | if ( InitTweak::isIntrinsicSingleArgCallStmt( ctorInit->get_ctor() ) ) { |
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[ec79847] | 521 | delete ctorInit->get_ctor(); |
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| 522 | ctorInit->set_ctor( NULL ); |
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| 523 | } |
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[f9cebb5] | 524 | |
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| 525 | if ( InitTweak::isIntrinsicSingleArgCallStmt( ctorInit->get_dtor() ) ) { |
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[ec79847] | 526 | delete ctorInit->get_dtor(); |
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| 527 | ctorInit->set_dtor( NULL ); |
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| 528 | } |
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[a465caf] | 529 | |
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| 530 | // xxx - todo -- what about arrays? |
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| 531 | // if ( dtor == NULL && InitTweak::isIntrinsicCallStmt( ctorInit->get_ctor() ) ) { |
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| 532 | // // can reduce the constructor down to a SingleInit using the |
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| 533 | // // second argument from the ctor call, since |
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| 534 | // delete ctorInit->get_ctor(); |
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| 535 | // ctorInit->set_ctor( NULL ); |
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| 536 | |
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| 537 | // Expression * arg = |
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| 538 | // ctorInit->set_init( new SingleInit( arg ) ); |
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| 539 | // } |
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[71f4e4f] | 540 | } |
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[51b7345] | 541 | } // namespace ResolvExpr |
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[a32b204] | 542 | |
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| 543 | // Local Variables: // |
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| 544 | // tab-width: 4 // |
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| 545 | // mode: c++ // |
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| 546 | // compile-command: "make install" // |
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| 547 | // End: // |
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