[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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[ea6332d] | 16 | #include <stddef.h> // for NULL |
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| 17 | #include <cassert> // for safe_dynamic_cast, assert |
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| 18 | #include <memory> // for allocator, allocator_traits<... |
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| 19 | #include <tuple> // for get |
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| 20 | |
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| 21 | #include "Alternative.h" // for Alternative, AltList |
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| 22 | #include "AlternativeFinder.h" // for AlternativeFinder, resolveIn... |
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| 23 | #include "Common/SemanticError.h" // for SemanticError |
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| 24 | #include "Common/utility.h" // for ValueGuard, group_iterate |
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| 25 | #include "CurrentObject.h" // for CurrentObject |
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| 26 | #include "InitTweak/InitTweak.h" // for isIntrinsicSingleArgCallStmt |
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| 27 | #include "RenameVars.h" // for RenameVars, global_renamer |
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| 28 | #include "ResolvExpr/TypeEnvironment.h" // for TypeEnvironment |
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| 29 | #include "ResolveTypeof.h" // for resolveTypeof |
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[e4d829b] | 30 | #include "Resolver.h" |
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[ea6332d] | 31 | #include "SymTab/Autogen.h" // for SizeType |
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| 32 | #include "SymTab/Indexer.h" // for Indexer |
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| 33 | #include "SynTree/Declaration.h" // for ObjectDecl, TypeDecl, Declar... |
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| 34 | #include "SynTree/Expression.h" // for Expression, CastExpr, InitExpr |
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| 35 | #include "SynTree/Initializer.h" // for ConstructorInit, SingleInit |
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| 36 | #include "SynTree/Statement.h" // for ForStmt, Statement, BranchStmt |
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| 37 | #include "SynTree/Type.h" // for Type, BasicType, PointerType |
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| 38 | #include "SynTree/TypeSubstitution.h" // for TypeSubstitution |
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| 39 | #include "SynTree/Visitor.h" // for acceptAll, maybeAccept |
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| 40 | #include "typeops.h" // for extractResultType |
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[51b7345] | 41 | |
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[d9a0e76] | 42 | using namespace std; |
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[51b7345] | 43 | |
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[d9a0e76] | 44 | namespace ResolvExpr { |
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[62e5546] | 45 | class Resolver final : public SymTab::Indexer { |
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[a32b204] | 46 | public: |
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[77971f6] | 47 | Resolver() : SymTab::Indexer( false ) {} |
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[1d2b64f] | 48 | Resolver( const SymTab:: Indexer & other ) : SymTab::Indexer( other ) { |
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| 49 | if ( const Resolver * res = dynamic_cast< const Resolver * >( &other ) ) { |
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| 50 | functionReturn = res->functionReturn; |
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[e4d829b] | 51 | currentObject = res->currentObject; |
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[1d2b64f] | 52 | inEnumDecl = res->inEnumDecl; |
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| 53 | } |
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| 54 | } |
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[71f4e4f] | 55 | |
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[1d2b64f] | 56 | typedef SymTab::Indexer Parent; |
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| 57 | using Parent::visit; |
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[62e5546] | 58 | virtual void visit( FunctionDecl *functionDecl ) override; |
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| 59 | virtual void visit( ObjectDecl *functionDecl ) override; |
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| 60 | virtual void visit( TypeDecl *typeDecl ) override; |
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| 61 | virtual void visit( EnumDecl * enumDecl ) override; |
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[94b4364] | 62 | |
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[62e5546] | 63 | virtual void visit( ArrayType * at ) override; |
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| 64 | virtual void visit( PointerType * at ) override; |
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[d9a0e76] | 65 | |
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[62e5546] | 66 | virtual void visit( ExprStmt *exprStmt ) override; |
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| 67 | virtual void visit( AsmExpr *asmExpr ) override; |
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| 68 | virtual void visit( AsmStmt *asmStmt ) override; |
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| 69 | virtual void visit( IfStmt *ifStmt ) override; |
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| 70 | virtual void visit( WhileStmt *whileStmt ) override; |
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| 71 | virtual void visit( ForStmt *forStmt ) override; |
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| 72 | virtual void visit( SwitchStmt *switchStmt ) override; |
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| 73 | virtual void visit( CaseStmt *caseStmt ) override; |
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| 74 | virtual void visit( BranchStmt *branchStmt ) override; |
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| 75 | virtual void visit( ReturnStmt *returnStmt ) override; |
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[307a732] | 76 | virtual void visit( ThrowStmt *throwStmt ) override; |
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[cbce272] | 77 | virtual void visit( CatchStmt *catchStmt ) override; |
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[d9a0e76] | 78 | |
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[62e5546] | 79 | virtual void visit( SingleInit *singleInit ) override; |
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| 80 | virtual void visit( ListInit *listInit ) override; |
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| 81 | virtual void visit( ConstructorInit *ctorInit ) override; |
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[a32b204] | 82 | private: |
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[94b4364] | 83 | typedef std::list< Initializer * >::iterator InitIterator; |
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| 84 | |
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[40e636a] | 85 | template< typename PtrType > |
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| 86 | void handlePtrType( PtrType * type ); |
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| 87 | |
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[30b65d8] | 88 | void resolveAggrInit( ReferenceToType *, InitIterator &, InitIterator & ); |
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| 89 | void resolveSingleAggrInit( Declaration *, InitIterator &, InitIterator &, TypeSubstitution sub ); |
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[f1e012b] | 90 | void fallbackInit( ConstructorInit * ctorInit ); |
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[b726084] | 91 | |
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[77971f6] | 92 | Type * functionReturn = nullptr; |
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[e4d829b] | 93 | CurrentObject currentObject = nullptr; |
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[a436947] | 94 | bool inEnumDecl = false; |
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[a32b204] | 95 | }; |
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[d9a0e76] | 96 | |
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[a32b204] | 97 | void resolve( std::list< Declaration * > translationUnit ) { |
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| 98 | Resolver resolver; |
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| 99 | acceptAll( translationUnit, resolver ); |
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[d9a0e76] | 100 | } |
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| 101 | |
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[a32b204] | 102 | Expression *resolveInVoidContext( Expression *expr, const SymTab::Indexer &indexer ) { |
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| 103 | TypeEnvironment env; |
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| 104 | return resolveInVoidContext( expr, indexer, env ); |
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[d9a0e76] | 105 | } |
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[a32b204] | 106 | |
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[db4ecc5] | 107 | |
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[a32b204] | 108 | namespace { |
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| 109 | void finishExpr( Expression *expr, const TypeEnvironment &env ) { |
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| 110 | expr->set_env( new TypeSubstitution ); |
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| 111 | env.makeSubstitution( *expr->get_env() ); |
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| 112 | } |
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[db4ecc5] | 113 | } // namespace |
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[a32b204] | 114 | |
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[db4ecc5] | 115 | Expression *findVoidExpression( Expression *untyped, const SymTab::Indexer &indexer ) { |
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| 116 | global_renamer.reset(); |
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| 117 | TypeEnvironment env; |
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| 118 | Expression *newExpr = resolveInVoidContext( untyped, indexer, env ); |
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| 119 | finishExpr( newExpr, env ); |
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| 120 | return newExpr; |
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| 121 | } |
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[71f4e4f] | 122 | |
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[db4ecc5] | 123 | namespace { |
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[a32b204] | 124 | Expression *findSingleExpression( Expression *untyped, const SymTab::Indexer &indexer ) { |
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| 125 | TypeEnvironment env; |
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| 126 | AlternativeFinder finder( indexer, env ); |
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| 127 | finder.find( untyped ); |
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[d9a0e76] | 128 | #if 0 |
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[a32b204] | 129 | if ( finder.get_alternatives().size() != 1 ) { |
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| 130 | std::cout << "untyped expr is "; |
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| 131 | untyped->print( std::cout ); |
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| 132 | std::cout << std::endl << "alternatives are:"; |
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| 133 | for ( std::list< Alternative >::const_iterator i = finder.get_alternatives().begin(); i != finder.get_alternatives().end(); ++i ) { |
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| 134 | i->print( std::cout ); |
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| 135 | } // for |
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| 136 | } // if |
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[d9a0e76] | 137 | #endif |
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[0b150ec] | 138 | assertf( finder.get_alternatives().size() == 1, "findSingleExpression: must have exactly one alternative at the end." ); |
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[a32b204] | 139 | Alternative &choice = finder.get_alternatives().front(); |
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| 140 | Expression *newExpr = choice.expr->clone(); |
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| 141 | finishExpr( newExpr, choice.env ); |
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| 142 | return newExpr; |
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| 143 | } |
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[d9a0e76] | 144 | |
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[a32b204] | 145 | bool isIntegralType( Type *type ) { |
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| 146 | if ( dynamic_cast< EnumInstType * >( type ) ) { |
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| 147 | return true; |
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| 148 | } else if ( BasicType *bt = dynamic_cast< BasicType * >( type ) ) { |
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| 149 | return bt->isInteger(); |
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[89e6ffc] | 150 | } else if ( dynamic_cast< ZeroType* >( type ) != nullptr || dynamic_cast< OneType* >( type ) != nullptr ) { |
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| 151 | return true; |
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[a32b204] | 152 | } else { |
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| 153 | return false; |
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| 154 | } // if |
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| 155 | } |
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[71f4e4f] | 156 | |
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[a32b204] | 157 | Expression *findIntegralExpression( Expression *untyped, const SymTab::Indexer &indexer ) { |
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| 158 | TypeEnvironment env; |
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| 159 | AlternativeFinder finder( indexer, env ); |
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| 160 | finder.find( untyped ); |
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[d9a0e76] | 161 | #if 0 |
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[a32b204] | 162 | if ( finder.get_alternatives().size() != 1 ) { |
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| 163 | std::cout << "untyped expr is "; |
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| 164 | untyped->print( std::cout ); |
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| 165 | std::cout << std::endl << "alternatives are:"; |
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| 166 | for ( std::list< Alternative >::const_iterator i = finder.get_alternatives().begin(); i != finder.get_alternatives().end(); ++i ) { |
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| 167 | i->print( std::cout ); |
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| 168 | } // for |
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| 169 | } // if |
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[d9a0e76] | 170 | #endif |
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[a32b204] | 171 | Expression *newExpr = 0; |
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| 172 | const TypeEnvironment *newEnv = 0; |
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| 173 | for ( AltList::const_iterator i = finder.get_alternatives().begin(); i != finder.get_alternatives().end(); ++i ) { |
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[906e24d] | 174 | if ( i->expr->get_result()->size() == 1 && isIntegralType( i->expr->get_result() ) ) { |
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[a32b204] | 175 | if ( newExpr ) { |
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| 176 | throw SemanticError( "Too many interpretations for case control expression", untyped ); |
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| 177 | } else { |
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| 178 | newExpr = i->expr->clone(); |
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| 179 | newEnv = &i->env; |
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| 180 | } // if |
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| 181 | } // if |
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| 182 | } // for |
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| 183 | if ( ! newExpr ) { |
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| 184 | throw SemanticError( "No interpretations for case control expression", untyped ); |
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| 185 | } // if |
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| 186 | finishExpr( newExpr, *newEnv ); |
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| 187 | return newExpr; |
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| 188 | } |
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[71f4e4f] | 189 | |
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[a32b204] | 190 | } |
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[71f4e4f] | 191 | |
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[a32b204] | 192 | void Resolver::visit( ObjectDecl *objectDecl ) { |
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| 193 | Type *new_type = resolveTypeof( objectDecl->get_type(), *this ); |
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| 194 | objectDecl->set_type( new_type ); |
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[3cfe27f] | 195 | // To handle initialization of routine pointers, e.g., int (*fp)(int) = foo(), means that class-variable |
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| 196 | // initContext is changed multiple time because the LHS is analysed twice. The second analysis changes |
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| 197 | // initContext because of a function type can contain object declarations in the return and parameter types. So |
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| 198 | // each value of initContext is retained, so the type on the first analysis is preserved and used for selecting |
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| 199 | // the RHS. |
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[e4d829b] | 200 | ValueGuard<CurrentObject> temp( currentObject ); |
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| 201 | currentObject = CurrentObject( objectDecl->get_type() ); |
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| 202 | if ( inEnumDecl && dynamic_cast< EnumInstType * >( objectDecl->get_type() ) ) { |
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[a436947] | 203 | // enumerator initializers should not use the enum type to initialize, since |
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| 204 | // the enum type is still incomplete at this point. Use signed int instead. |
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[e4d829b] | 205 | currentObject = CurrentObject( new BasicType( Type::Qualifiers(), BasicType::SignedInt ) ); |
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[a436947] | 206 | } |
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[1d2b64f] | 207 | Parent::visit( objectDecl ); |
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[e4d829b] | 208 | if ( inEnumDecl && dynamic_cast< EnumInstType * >( objectDecl->get_type() ) ) { |
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[a436947] | 209 | // delete newly created signed int type |
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[e4d829b] | 210 | // delete currentObject.getType(); |
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[a436947] | 211 | } |
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[bfbf97f] | 212 | } |
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| 213 | |
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[40e636a] | 214 | template< typename PtrType > |
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| 215 | void Resolver::handlePtrType( PtrType * type ) { |
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| 216 | if ( type->get_dimension() ) { |
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| 217 | CastExpr *castExpr = new CastExpr( type->get_dimension(), SymTab::SizeType->clone() ); |
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[bfbf97f] | 218 | Expression *newExpr = findSingleExpression( castExpr, *this ); |
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[40e636a] | 219 | delete type->get_dimension(); |
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| 220 | type->set_dimension( newExpr ); |
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[d1d17f5] | 221 | } |
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[40e636a] | 222 | } |
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| 223 | |
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| 224 | void Resolver::visit( ArrayType * at ) { |
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| 225 | handlePtrType( at ); |
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[1d2b64f] | 226 | Parent::visit( at ); |
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[a32b204] | 227 | } |
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[94b4364] | 228 | |
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[40e636a] | 229 | void Resolver::visit( PointerType * pt ) { |
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| 230 | handlePtrType( pt ); |
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[1d2b64f] | 231 | Parent::visit( pt ); |
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[40e636a] | 232 | } |
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| 233 | |
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[a32b204] | 234 | void Resolver::visit( TypeDecl *typeDecl ) { |
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| 235 | if ( typeDecl->get_base() ) { |
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| 236 | Type *new_type = resolveTypeof( typeDecl->get_base(), *this ); |
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| 237 | typeDecl->set_base( new_type ); |
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| 238 | } // if |
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[1d2b64f] | 239 | Parent::visit( typeDecl ); |
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[a32b204] | 240 | } |
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[94b4364] | 241 | |
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[a32b204] | 242 | void Resolver::visit( FunctionDecl *functionDecl ) { |
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[d9a0e76] | 243 | #if 0 |
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[a32b204] | 244 | std::cout << "resolver visiting functiondecl "; |
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| 245 | functionDecl->print( std::cout ); |
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| 246 | std::cout << std::endl; |
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[d9a0e76] | 247 | #endif |
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[a32b204] | 248 | Type *new_type = resolveTypeof( functionDecl->get_type(), *this ); |
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| 249 | functionDecl->set_type( new_type ); |
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[906e24d] | 250 | ValueGuard< Type * > oldFunctionReturn( functionReturn ); |
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| 251 | functionReturn = ResolvExpr::extractResultType( functionDecl->get_functionType() ); |
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[1d2b64f] | 252 | Parent::visit( functionDecl ); |
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[88d1066] | 253 | |
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| 254 | // default value expressions have an environment which shouldn't be there and trips up later passes. |
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| 255 | // xxx - it might be necessary to somehow keep the information from this environment, but I can't currently |
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| 256 | // see how it's useful. |
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| 257 | for ( Declaration * d : functionDecl->get_functionType()->get_parameters() ) { |
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| 258 | if ( ObjectDecl * obj = dynamic_cast< ObjectDecl * >( d ) ) { |
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| 259 | if ( SingleInit * init = dynamic_cast< SingleInit * >( obj->get_init() ) ) { |
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| 260 | delete init->get_value()->get_env(); |
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| 261 | init->get_value()->set_env( nullptr ); |
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| 262 | } |
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| 263 | } |
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| 264 | } |
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[a32b204] | 265 | } |
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[51b7345] | 266 | |
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[a436947] | 267 | void Resolver::visit( EnumDecl * enumDecl ) { |
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| 268 | // in case we decide to allow nested enums |
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[1d2b64f] | 269 | ValueGuard< bool > oldInEnumDecl( inEnumDecl ); |
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[a436947] | 270 | inEnumDecl = true; |
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[1d2b64f] | 271 | Parent::visit( enumDecl ); |
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[a436947] | 272 | } |
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| 273 | |
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[a32b204] | 274 | void Resolver::visit( ExprStmt *exprStmt ) { |
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[1d2b64f] | 275 | assertf( exprStmt->get_expr(), "ExprStmt has null Expression in resolver" ); |
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| 276 | Expression *newExpr = findVoidExpression( exprStmt->get_expr(), *this ); |
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| 277 | delete exprStmt->get_expr(); |
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| 278 | exprStmt->set_expr( newExpr ); |
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[a32b204] | 279 | } |
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[51b7345] | 280 | |
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[7f5566b] | 281 | void Resolver::visit( AsmExpr *asmExpr ) { |
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| 282 | Expression *newExpr = findVoidExpression( asmExpr->get_operand(), *this ); |
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| 283 | delete asmExpr->get_operand(); |
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| 284 | asmExpr->set_operand( newExpr ); |
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| 285 | if ( asmExpr->get_inout() ) { |
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| 286 | newExpr = findVoidExpression( asmExpr->get_inout(), *this ); |
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| 287 | delete asmExpr->get_inout(); |
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| 288 | asmExpr->set_inout( newExpr ); |
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| 289 | } // if |
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| 290 | } |
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| 291 | |
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| 292 | void Resolver::visit( AsmStmt *asmStmt ) { |
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| 293 | acceptAll( asmStmt->get_input(), *this); |
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| 294 | acceptAll( asmStmt->get_output(), *this); |
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| 295 | } |
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| 296 | |
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[a32b204] | 297 | void Resolver::visit( IfStmt *ifStmt ) { |
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| 298 | Expression *newExpr = findSingleExpression( ifStmt->get_condition(), *this ); |
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| 299 | delete ifStmt->get_condition(); |
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| 300 | ifStmt->set_condition( newExpr ); |
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[1d2b64f] | 301 | Parent::visit( ifStmt ); |
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[a32b204] | 302 | } |
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[51b7345] | 303 | |
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[a32b204] | 304 | void Resolver::visit( WhileStmt *whileStmt ) { |
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| 305 | Expression *newExpr = findSingleExpression( whileStmt->get_condition(), *this ); |
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| 306 | delete whileStmt->get_condition(); |
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| 307 | whileStmt->set_condition( newExpr ); |
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[1d2b64f] | 308 | Parent::visit( whileStmt ); |
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[a32b204] | 309 | } |
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[51b7345] | 310 | |
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[a32b204] | 311 | void Resolver::visit( ForStmt *forStmt ) { |
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[1d2b64f] | 312 | Parent::visit( forStmt ); |
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[145f1fc] | 313 | |
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[a32b204] | 314 | if ( forStmt->get_condition() ) { |
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[145f1fc] | 315 | Expression * newExpr = findSingleExpression( forStmt->get_condition(), *this ); |
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[a32b204] | 316 | delete forStmt->get_condition(); |
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| 317 | forStmt->set_condition( newExpr ); |
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| 318 | } // if |
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[71f4e4f] | 319 | |
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[a32b204] | 320 | if ( forStmt->get_increment() ) { |
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[145f1fc] | 321 | Expression * newExpr = findVoidExpression( forStmt->get_increment(), *this ); |
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[a32b204] | 322 | delete forStmt->get_increment(); |
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| 323 | forStmt->set_increment( newExpr ); |
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| 324 | } // if |
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| 325 | } |
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[51b7345] | 326 | |
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[32b8144] | 327 | void Resolver::visit( SwitchStmt *switchStmt ) { |
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[e4d829b] | 328 | ValueGuard< CurrentObject > oldCurrentObject( currentObject ); |
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[a32b204] | 329 | Expression *newExpr; |
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[32b8144] | 330 | newExpr = findIntegralExpression( switchStmt->get_condition(), *this ); |
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[a32b204] | 331 | delete switchStmt->get_condition(); |
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| 332 | switchStmt->set_condition( newExpr ); |
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[71f4e4f] | 333 | |
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[e4d829b] | 334 | currentObject = CurrentObject( newExpr->get_result() ); |
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[32b8144] | 335 | Parent::visit( switchStmt ); |
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[a32b204] | 336 | } |
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[51b7345] | 337 | |
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[a32b204] | 338 | void Resolver::visit( CaseStmt *caseStmt ) { |
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[32b8144] | 339 | if ( caseStmt->get_condition() ) { |
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[e4d829b] | 340 | std::list< InitAlternative > initAlts = currentObject.getOptions(); |
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| 341 | assertf( initAlts.size() == 1, "SwitchStmt did not correctly resolve an integral expression." ); |
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| 342 | CastExpr * castExpr = new CastExpr( caseStmt->get_condition(), initAlts.front().type->clone() ); |
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[32b8144] | 343 | Expression * newExpr = findSingleExpression( castExpr, *this ); |
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| 344 | castExpr = safe_dynamic_cast< CastExpr * >( newExpr ); |
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| 345 | caseStmt->set_condition( castExpr->get_arg() ); |
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| 346 | castExpr->set_arg( nullptr ); |
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| 347 | delete castExpr; |
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| 348 | } |
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[1d2b64f] | 349 | Parent::visit( caseStmt ); |
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[a32b204] | 350 | } |
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[51b7345] | 351 | |
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[de62360d] | 352 | void Resolver::visit( BranchStmt *branchStmt ) { |
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| 353 | // must resolve the argument for a computed goto |
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| 354 | if ( branchStmt->get_type() == BranchStmt::Goto ) { // check for computed goto statement |
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[2871210] | 355 | if ( Expression * arg = branchStmt->get_computedTarget() ) { |
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[de62360d] | 356 | VoidType v = Type::Qualifiers(); // cast to void * for the alternative finder |
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| 357 | PointerType pt( Type::Qualifiers(), v.clone() ); |
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| 358 | CastExpr * castExpr = new CastExpr( arg, pt.clone() ); |
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| 359 | Expression * newExpr = findSingleExpression( castExpr, *this ); // find best expression |
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| 360 | branchStmt->set_target( newExpr ); |
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| 361 | } // if |
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| 362 | } // if |
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| 363 | } |
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| 364 | |
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[a32b204] | 365 | void Resolver::visit( ReturnStmt *returnStmt ) { |
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| 366 | if ( returnStmt->get_expr() ) { |
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[906e24d] | 367 | CastExpr *castExpr = new CastExpr( returnStmt->get_expr(), functionReturn->clone() ); |
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[a32b204] | 368 | Expression *newExpr = findSingleExpression( castExpr, *this ); |
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| 369 | delete castExpr; |
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| 370 | returnStmt->set_expr( newExpr ); |
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| 371 | } // if |
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| 372 | } |
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[51b7345] | 373 | |
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[307a732] | 374 | void Resolver::visit( ThrowStmt *throwStmt ) { |
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[cbce272] | 375 | // TODO: Replace *exception type with &exception type. |
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[307a732] | 376 | if ( throwStmt->get_expr() ) { |
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[cbce272] | 377 | StructDecl * exception_decl = |
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| 378 | lookupStruct( "__cfaehm__base_exception_t" ); |
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| 379 | assert( exception_decl ); |
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| 380 | Expression * wrapped = new CastExpr( |
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| 381 | throwStmt->get_expr(), |
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| 382 | new PointerType( |
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| 383 | noQualifiers, |
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| 384 | new StructInstType( |
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| 385 | noQualifiers, |
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| 386 | exception_decl |
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| 387 | ) |
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| 388 | ) |
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| 389 | ); |
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[307a732] | 390 | Expression * newExpr = findSingleExpression( wrapped, *this ); |
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| 391 | throwStmt->set_expr( newExpr ); |
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| 392 | } |
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| 393 | } |
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| 394 | |
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[cbce272] | 395 | void Resolver::visit( CatchStmt *catchStmt ) { |
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[3f27b9a] | 396 | // inline Indexer::visit so that the exception variable is still in-scope for |
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| 397 | // findSingleExpression() below |
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| 398 | Parent::enterScope(); |
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| 399 | Visitor::visit( catchStmt ); |
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[6a36975] | 400 | |
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[cbce272] | 401 | if ( catchStmt->get_cond() ) { |
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| 402 | Expression * wrapped = new CastExpr( |
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| 403 | catchStmt->get_cond(), |
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| 404 | new BasicType( noQualifiers, BasicType::Bool ) |
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| 405 | ); |
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| 406 | catchStmt->set_cond( findSingleExpression( wrapped, *this ) ); |
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| 407 | } |
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[3f27b9a] | 408 | |
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| 409 | Parent::leaveScope(); |
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[cbce272] | 410 | } |
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| 411 | |
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[b5c5684] | 412 | template< typename T > |
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| 413 | bool isCharType( T t ) { |
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| 414 | if ( BasicType * bt = dynamic_cast< BasicType * >( t ) ) { |
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[71f4e4f] | 415 | return bt->get_kind() == BasicType::Char || bt->get_kind() == BasicType::SignedChar || |
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[b5c5684] | 416 | bt->get_kind() == BasicType::UnsignedChar; |
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| 417 | } |
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| 418 | return false; |
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| 419 | } |
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| 420 | |
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[e4d829b] | 421 | void Resolver::visit( SingleInit *singleInit ) { |
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[62423350] | 422 | // resolve initialization using the possibilities as determined by the currentObject cursor |
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[e4d829b] | 423 | UntypedInitExpr * untyped = new UntypedInitExpr( singleInit->get_value(), currentObject.getOptions() ); |
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| 424 | Expression * newExpr = findSingleExpression( untyped, *this ); |
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| 425 | InitExpr * initExpr = safe_dynamic_cast< InitExpr * >( newExpr ); |
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[62423350] | 426 | |
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| 427 | // move cursor to the object that is actually initialized |
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[e4d829b] | 428 | currentObject.setNext( initExpr->get_designation() ); |
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[62423350] | 429 | |
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| 430 | // discard InitExpr wrapper and retain relevant pieces |
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| 431 | newExpr = initExpr->get_expr(); |
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[435e75f] | 432 | newExpr->set_env( initExpr->get_env() ); |
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[62423350] | 433 | initExpr->set_expr( nullptr ); |
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| 434 | initExpr->set_env( nullptr ); |
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[e4d829b] | 435 | delete initExpr; |
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| 436 | |
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[62423350] | 437 | // get the actual object's type (may not exactly match what comes back from the resolver due to conversions) |
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| 438 | Type * initContext = currentObject.getCurrentType(); |
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| 439 | |
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| 440 | // check if actual object's type is char[] |
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| 441 | if ( ArrayType * at = dynamic_cast< ArrayType * >( initContext ) ) { |
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| 442 | if ( isCharType( at->get_base() ) ) { |
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| 443 | // check if the resolved type is char * |
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| 444 | if ( PointerType * pt = dynamic_cast< PointerType *>( newExpr->get_result() ) ) { |
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| 445 | if ( isCharType( pt->get_base() ) ) { |
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| 446 | // strip cast if we're initializing a char[] with a char *, e.g. char x[] = "hello"; |
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| 447 | CastExpr *ce = safe_dynamic_cast< CastExpr * >( newExpr ); |
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| 448 | newExpr = ce->get_arg(); |
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| 449 | ce->set_arg( nullptr ); |
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| 450 | delete ce; |
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| 451 | } |
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| 452 | } |
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| 453 | } |
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| 454 | } |
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[94b4364] | 455 | |
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[62423350] | 456 | // set initializer expr to resolved express |
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| 457 | singleInit->set_value( newExpr ); |
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| 458 | |
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| 459 | // move cursor to next object in preparation for next initializer |
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| 460 | currentObject.increment(); |
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| 461 | } |
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[94b4364] | 462 | |
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| 463 | void Resolver::visit( ListInit * listInit ) { |
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[62423350] | 464 | // move cursor into brace-enclosed initializer-list |
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[e4d829b] | 465 | currentObject.enterListInit(); |
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| 466 | // xxx - fix this so that the list isn't copied, iterator should be used to change current element |
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| 467 | std::list<Designation *> newDesignations; |
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| 468 | for ( auto p : group_iterate(listInit->get_designations(), listInit->get_initializers()) ) { |
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[62423350] | 469 | // iterate designations and initializers in pairs, moving the cursor to the current designated object and resolving |
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| 470 | // the initializer against that object. |
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[e4d829b] | 471 | Designation * des = std::get<0>(p); |
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| 472 | Initializer * init = std::get<1>(p); |
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| 473 | newDesignations.push_back( currentObject.findNext( des ) ); |
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| 474 | init->accept( *this ); |
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[b5c5684] | 475 | } |
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[62423350] | 476 | // set the set of 'resolved' designations and leave the brace-enclosed initializer-list |
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[e4d829b] | 477 | listInit->get_designations() = newDesignations; // xxx - memory management |
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| 478 | currentObject.exitListInit(); |
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| 479 | |
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[62423350] | 480 | // xxx - this part has not be folded into CurrentObject yet |
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[e4d829b] | 481 | // } else if ( TypeInstType * tt = dynamic_cast< TypeInstType * >( initContext ) ) { |
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| 482 | // Type * base = tt->get_baseType()->get_base(); |
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| 483 | // if ( base ) { |
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| 484 | // // know the implementation type, so try using that as the initContext |
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| 485 | // ObjectDecl tmpObj( "", Type::StorageClasses(), LinkageSpec::Cforall, nullptr, base->clone(), nullptr ); |
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| 486 | // currentObject = &tmpObj; |
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| 487 | // visit( listInit ); |
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| 488 | // } else { |
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| 489 | // // missing implementation type -- might be an unknown type variable, so try proceeding with the current init context |
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| 490 | // Parent::visit( listInit ); |
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| 491 | // } |
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| 492 | // } else { |
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[a32b204] | 493 | } |
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[71f4e4f] | 494 | |
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[f1e012b] | 495 | // ConstructorInit - fall back on C-style initializer |
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| 496 | void Resolver::fallbackInit( ConstructorInit * ctorInit ) { |
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| 497 | // could not find valid constructor, or found an intrinsic constructor |
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| 498 | // fall back on C-style initializer |
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| 499 | delete ctorInit->get_ctor(); |
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| 500 | ctorInit->set_ctor( NULL ); |
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[71a145de] | 501 | delete ctorInit->get_dtor(); |
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| 502 | ctorInit->set_dtor( NULL ); |
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[f1e012b] | 503 | maybeAccept( ctorInit->get_init(), *this ); |
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| 504 | } |
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| 505 | |
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[1d2b64f] | 506 | // needs to be callable from outside the resolver, so this is a standalone function |
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| 507 | void resolveCtorInit( ConstructorInit * ctorInit, const SymTab::Indexer & indexer ) { |
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| 508 | assert( ctorInit ); |
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| 509 | Resolver resolver( indexer ); |
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| 510 | ctorInit->accept( resolver ); |
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| 511 | } |
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| 512 | |
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| 513 | void resolveStmtExpr( StmtExpr * stmtExpr, const SymTab::Indexer & indexer ) { |
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| 514 | assert( stmtExpr ); |
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| 515 | Resolver resolver( indexer ); |
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| 516 | stmtExpr->accept( resolver ); |
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| 517 | } |
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| 518 | |
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[71f4e4f] | 519 | void Resolver::visit( ConstructorInit *ctorInit ) { |
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[1ba88a0] | 520 | // xxx - fallback init has been removed => remove fallbackInit function and remove complexity from FixInit and remove C-init from ConstructorInit |
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| 521 | maybeAccept( ctorInit->get_ctor(), *this ); |
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| 522 | maybeAccept( ctorInit->get_dtor(), *this ); |
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[071a31a] | 523 | |
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[5b2f5bb] | 524 | // found a constructor - can get rid of C-style initializer |
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| 525 | delete ctorInit->get_init(); |
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| 526 | ctorInit->set_init( NULL ); |
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[ec79847] | 527 | |
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| 528 | // intrinsic single parameter constructors and destructors do nothing. Since this was |
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| 529 | // implicitly generated, there's no way for it to have side effects, so get rid of it |
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| 530 | // to clean up generated code. |
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[f9cebb5] | 531 | if ( InitTweak::isIntrinsicSingleArgCallStmt( ctorInit->get_ctor() ) ) { |
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[ec79847] | 532 | delete ctorInit->get_ctor(); |
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| 533 | ctorInit->set_ctor( NULL ); |
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| 534 | } |
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[f9cebb5] | 535 | |
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| 536 | if ( InitTweak::isIntrinsicSingleArgCallStmt( ctorInit->get_dtor() ) ) { |
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[ec79847] | 537 | delete ctorInit->get_dtor(); |
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| 538 | ctorInit->set_dtor( NULL ); |
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| 539 | } |
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[a465caf] | 540 | |
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| 541 | // xxx - todo -- what about arrays? |
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| 542 | // if ( dtor == NULL && InitTweak::isIntrinsicCallStmt( ctorInit->get_ctor() ) ) { |
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| 543 | // // can reduce the constructor down to a SingleInit using the |
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| 544 | // // second argument from the ctor call, since |
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| 545 | // delete ctorInit->get_ctor(); |
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| 546 | // ctorInit->set_ctor( NULL ); |
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| 547 | |
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| 548 | // Expression * arg = |
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| 549 | // ctorInit->set_init( new SingleInit( arg ) ); |
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| 550 | // } |
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[71f4e4f] | 551 | } |
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[51b7345] | 552 | } // namespace ResolvExpr |
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[a32b204] | 553 | |
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| 554 | // Local Variables: // |
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| 555 | // tab-width: 4 // |
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| 556 | // mode: c++ // |
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| 557 | // compile-command: "make install" // |
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| 558 | // End: // |
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