1 | // |
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2 | // Cforall Version 1.0.0 Copyright (C) 2015 University of Waterloo |
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3 | // |
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4 | // The contents of this file are covered under the licence agreement in the |
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5 | // file "LICENCE" distributed with Cforall. |
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6 | // |
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7 | // Resolver.cc -- |
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8 | // |
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9 | // Author : Richard C. Bilson |
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10 | // Created On : Sun May 17 12:17:01 2015 |
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11 | // Last Modified By : Peter A. Buhr |
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12 | // Last Modified On : Tue Jul 12 17:45:42 2016 |
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13 | // Update Count : 204 |
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14 | // |
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15 | |
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16 | #include "Resolver.h" |
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17 | #include "AlternativeFinder.h" |
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18 | #include "Alternative.h" |
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19 | #include "RenameVars.h" |
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20 | #include "ResolveTypeof.h" |
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21 | #include "typeops.h" |
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22 | #include "SynTree/Statement.h" |
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23 | #include "SynTree/Type.h" |
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24 | #include "SynTree/Expression.h" |
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25 | #include "SynTree/Initializer.h" |
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26 | #include "SymTab/Indexer.h" |
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27 | #include "SymTab/Autogen.h" |
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28 | #include "Common/utility.h" |
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29 | #include "InitTweak/InitTweak.h" |
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30 | |
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31 | #include <iostream> |
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32 | using namespace std; |
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33 | |
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34 | namespace ResolvExpr { |
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35 | class Resolver final : public SymTab::Indexer { |
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36 | public: |
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37 | Resolver() : SymTab::Indexer( false ) {} |
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38 | Resolver( const SymTab:: Indexer & other ) : SymTab::Indexer( other ) { |
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39 | if ( const Resolver * res = dynamic_cast< const Resolver * >( &other ) ) { |
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40 | functionReturn = res->functionReturn; |
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41 | initContext = res->initContext; |
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42 | inEnumDecl = res->inEnumDecl; |
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43 | } |
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44 | } |
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45 | |
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46 | typedef SymTab::Indexer Parent; |
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47 | using Parent::visit; |
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48 | virtual void visit( FunctionDecl *functionDecl ) override; |
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49 | virtual void visit( ObjectDecl *functionDecl ) override; |
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50 | virtual void visit( TypeDecl *typeDecl ) override; |
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51 | virtual void visit( EnumDecl * enumDecl ) override; |
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52 | |
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53 | virtual void visit( ArrayType * at ) override; |
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54 | virtual void visit( PointerType * at ) override; |
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55 | |
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56 | virtual void visit( ExprStmt *exprStmt ) override; |
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57 | virtual void visit( AsmExpr *asmExpr ) override; |
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58 | virtual void visit( AsmStmt *asmStmt ) override; |
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59 | virtual void visit( IfStmt *ifStmt ) override; |
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60 | virtual void visit( WhileStmt *whileStmt ) override; |
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61 | virtual void visit( ForStmt *forStmt ) override; |
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62 | virtual void visit( SwitchStmt *switchStmt ) override; |
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63 | virtual void visit( CaseStmt *caseStmt ) override; |
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64 | virtual void visit( BranchStmt *branchStmt ) override; |
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65 | virtual void visit( ReturnStmt *returnStmt ) override; |
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66 | |
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67 | virtual void visit( SingleInit *singleInit ) override; |
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68 | virtual void visit( ListInit *listInit ) override; |
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69 | virtual void visit( ConstructorInit *ctorInit ) override; |
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70 | private: |
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71 | typedef std::list< Initializer * >::iterator InitIterator; |
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72 | |
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73 | template< typename PtrType > |
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74 | void handlePtrType( PtrType * type ); |
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75 | |
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76 | void resolveAggrInit( ReferenceToType *, InitIterator &, InitIterator & ); |
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77 | void resolveSingleAggrInit( Declaration *, InitIterator &, InitIterator &, TypeSubstitution sub ); |
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78 | void fallbackInit( ConstructorInit * ctorInit ); |
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79 | |
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80 | Type * functionReturn = nullptr; |
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81 | Type *initContext = nullptr; |
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82 | bool inEnumDecl = false; |
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83 | }; |
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84 | |
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85 | void resolve( std::list< Declaration * > translationUnit ) { |
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86 | Resolver resolver; |
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87 | acceptAll( translationUnit, resolver ); |
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88 | } |
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89 | |
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90 | Expression *resolveInVoidContext( Expression *expr, const SymTab::Indexer &indexer ) { |
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91 | TypeEnvironment env; |
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92 | return resolveInVoidContext( expr, indexer, env ); |
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93 | } |
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94 | |
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95 | |
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96 | namespace { |
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97 | void finishExpr( Expression *expr, const TypeEnvironment &env ) { |
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98 | expr->set_env( new TypeSubstitution ); |
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99 | env.makeSubstitution( *expr->get_env() ); |
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100 | } |
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101 | } // namespace |
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102 | |
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103 | Expression *findVoidExpression( Expression *untyped, const SymTab::Indexer &indexer ) { |
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104 | global_renamer.reset(); |
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105 | TypeEnvironment env; |
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106 | Expression *newExpr = resolveInVoidContext( untyped, indexer, env ); |
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107 | finishExpr( newExpr, env ); |
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108 | return newExpr; |
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109 | } |
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110 | |
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111 | namespace { |
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112 | Expression *findSingleExpression( Expression *untyped, const SymTab::Indexer &indexer ) { |
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113 | TypeEnvironment env; |
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114 | AlternativeFinder finder( indexer, env ); |
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115 | finder.find( untyped ); |
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116 | #if 0 |
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117 | if ( finder.get_alternatives().size() != 1 ) { |
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118 | std::cout << "untyped expr is "; |
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119 | untyped->print( std::cout ); |
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120 | std::cout << std::endl << "alternatives are:"; |
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121 | for ( std::list< Alternative >::const_iterator i = finder.get_alternatives().begin(); i != finder.get_alternatives().end(); ++i ) { |
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122 | i->print( std::cout ); |
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123 | } // for |
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124 | } // if |
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125 | #endif |
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126 | assert( finder.get_alternatives().size() == 1 ); |
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127 | Alternative &choice = finder.get_alternatives().front(); |
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128 | Expression *newExpr = choice.expr->clone(); |
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129 | finishExpr( newExpr, choice.env ); |
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130 | return newExpr; |
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131 | } |
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132 | |
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133 | bool isIntegralType( Type *type ) { |
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134 | if ( dynamic_cast< EnumInstType * >( type ) ) { |
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135 | return true; |
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136 | } else if ( BasicType *bt = dynamic_cast< BasicType * >( type ) ) { |
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137 | return bt->isInteger(); |
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138 | } else if ( dynamic_cast< ZeroType* >( type ) != nullptr || dynamic_cast< OneType* >( type ) != nullptr ) { |
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139 | return true; |
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140 | } else { |
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141 | return false; |
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142 | } // if |
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143 | } |
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144 | |
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145 | Expression *findIntegralExpression( Expression *untyped, const SymTab::Indexer &indexer ) { |
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146 | TypeEnvironment env; |
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147 | AlternativeFinder finder( indexer, env ); |
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148 | finder.find( untyped ); |
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149 | #if 0 |
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150 | if ( finder.get_alternatives().size() != 1 ) { |
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151 | std::cout << "untyped expr is "; |
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152 | untyped->print( std::cout ); |
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153 | std::cout << std::endl << "alternatives are:"; |
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154 | for ( std::list< Alternative >::const_iterator i = finder.get_alternatives().begin(); i != finder.get_alternatives().end(); ++i ) { |
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155 | i->print( std::cout ); |
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156 | } // for |
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157 | } // if |
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158 | #endif |
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159 | Expression *newExpr = 0; |
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160 | const TypeEnvironment *newEnv = 0; |
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161 | for ( AltList::const_iterator i = finder.get_alternatives().begin(); i != finder.get_alternatives().end(); ++i ) { |
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162 | if ( i->expr->get_result()->size() == 1 && isIntegralType( i->expr->get_result() ) ) { |
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163 | if ( newExpr ) { |
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164 | throw SemanticError( "Too many interpretations for case control expression", untyped ); |
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165 | } else { |
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166 | newExpr = i->expr->clone(); |
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167 | newEnv = &i->env; |
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168 | } // if |
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169 | } // if |
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170 | } // for |
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171 | if ( ! newExpr ) { |
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172 | throw SemanticError( "No interpretations for case control expression", untyped ); |
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173 | } // if |
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174 | finishExpr( newExpr, *newEnv ); |
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175 | return newExpr; |
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176 | } |
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177 | |
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178 | } |
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179 | |
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180 | void Resolver::visit( ObjectDecl *objectDecl ) { |
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181 | Type *new_type = resolveTypeof( objectDecl->get_type(), *this ); |
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182 | objectDecl->set_type( new_type ); |
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183 | // To handle initialization of routine pointers, e.g., int (*fp)(int) = foo(), means that class-variable |
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184 | // initContext is changed multiple time because the LHS is analysed twice. The second analysis changes |
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185 | // initContext because of a function type can contain object declarations in the return and parameter types. So |
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186 | // each value of initContext is retained, so the type on the first analysis is preserved and used for selecting |
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187 | // the RHS. |
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188 | Type *temp = initContext; |
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189 | initContext = new_type; |
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190 | if ( inEnumDecl && dynamic_cast< EnumInstType * >( initContext ) ) { |
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191 | // enumerator initializers should not use the enum type to initialize, since |
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192 | // the enum type is still incomplete at this point. Use signed int instead. |
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193 | initContext = new BasicType( Type::Qualifiers(), BasicType::SignedInt ); |
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194 | } |
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195 | Parent::visit( objectDecl ); |
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196 | if ( inEnumDecl && dynamic_cast< EnumInstType * >( initContext ) ) { |
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197 | // delete newly created signed int type |
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198 | delete initContext; |
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199 | } |
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200 | initContext = temp; |
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201 | } |
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202 | |
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203 | template< typename PtrType > |
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204 | void Resolver::handlePtrType( PtrType * type ) { |
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205 | if ( type->get_dimension() ) { |
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206 | CastExpr *castExpr = new CastExpr( type->get_dimension(), SymTab::SizeType->clone() ); |
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207 | Expression *newExpr = findSingleExpression( castExpr, *this ); |
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208 | delete type->get_dimension(); |
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209 | type->set_dimension( newExpr ); |
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210 | } |
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211 | } |
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212 | |
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213 | void Resolver::visit( ArrayType * at ) { |
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214 | handlePtrType( at ); |
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215 | Parent::visit( at ); |
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216 | } |
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217 | |
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218 | void Resolver::visit( PointerType * pt ) { |
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219 | handlePtrType( pt ); |
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220 | Parent::visit( pt ); |
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221 | } |
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222 | |
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223 | void Resolver::visit( TypeDecl *typeDecl ) { |
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224 | if ( typeDecl->get_base() ) { |
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225 | Type *new_type = resolveTypeof( typeDecl->get_base(), *this ); |
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226 | typeDecl->set_base( new_type ); |
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227 | } // if |
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228 | Parent::visit( typeDecl ); |
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229 | } |
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230 | |
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231 | void Resolver::visit( FunctionDecl *functionDecl ) { |
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232 | #if 0 |
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233 | std::cout << "resolver visiting functiondecl "; |
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234 | functionDecl->print( std::cout ); |
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235 | std::cout << std::endl; |
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236 | #endif |
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237 | Type *new_type = resolveTypeof( functionDecl->get_type(), *this ); |
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238 | functionDecl->set_type( new_type ); |
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239 | ValueGuard< Type * > oldFunctionReturn( functionReturn ); |
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240 | functionReturn = ResolvExpr::extractResultType( functionDecl->get_functionType() ); |
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241 | Parent::visit( functionDecl ); |
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242 | |
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243 | // default value expressions have an environment which shouldn't be there and trips up later passes. |
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244 | // xxx - it might be necessary to somehow keep the information from this environment, but I can't currently |
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245 | // see how it's useful. |
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246 | for ( Declaration * d : functionDecl->get_functionType()->get_parameters() ) { |
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247 | if ( ObjectDecl * obj = dynamic_cast< ObjectDecl * >( d ) ) { |
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248 | if ( SingleInit * init = dynamic_cast< SingleInit * >( obj->get_init() ) ) { |
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249 | delete init->get_value()->get_env(); |
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250 | init->get_value()->set_env( nullptr ); |
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251 | } |
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252 | } |
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253 | } |
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254 | } |
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255 | |
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256 | void Resolver::visit( EnumDecl * enumDecl ) { |
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257 | // in case we decide to allow nested enums |
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258 | ValueGuard< bool > oldInEnumDecl( inEnumDecl ); |
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259 | inEnumDecl = true; |
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260 | Parent::visit( enumDecl ); |
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261 | } |
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262 | |
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263 | void Resolver::visit( ExprStmt *exprStmt ) { |
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264 | assertf( exprStmt->get_expr(), "ExprStmt has null Expression in resolver" ); |
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265 | Expression *newExpr = findVoidExpression( exprStmt->get_expr(), *this ); |
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266 | delete exprStmt->get_expr(); |
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267 | exprStmt->set_expr( newExpr ); |
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268 | } |
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269 | |
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270 | void Resolver::visit( AsmExpr *asmExpr ) { |
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271 | Expression *newExpr = findVoidExpression( asmExpr->get_operand(), *this ); |
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272 | delete asmExpr->get_operand(); |
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273 | asmExpr->set_operand( newExpr ); |
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274 | if ( asmExpr->get_inout() ) { |
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275 | newExpr = findVoidExpression( asmExpr->get_inout(), *this ); |
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276 | delete asmExpr->get_inout(); |
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277 | asmExpr->set_inout( newExpr ); |
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278 | } // if |
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279 | } |
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280 | |
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281 | void Resolver::visit( AsmStmt *asmStmt ) { |
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282 | acceptAll( asmStmt->get_input(), *this); |
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283 | acceptAll( asmStmt->get_output(), *this); |
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284 | } |
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285 | |
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286 | void Resolver::visit( IfStmt *ifStmt ) { |
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287 | Expression *newExpr = findSingleExpression( ifStmt->get_condition(), *this ); |
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288 | delete ifStmt->get_condition(); |
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289 | ifStmt->set_condition( newExpr ); |
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290 | Parent::visit( ifStmt ); |
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291 | } |
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292 | |
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293 | void Resolver::visit( WhileStmt *whileStmt ) { |
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294 | Expression *newExpr = findSingleExpression( whileStmt->get_condition(), *this ); |
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295 | delete whileStmt->get_condition(); |
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296 | whileStmt->set_condition( newExpr ); |
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297 | Parent::visit( whileStmt ); |
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298 | } |
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299 | |
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300 | void Resolver::visit( ForStmt *forStmt ) { |
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301 | Parent::visit( forStmt ); |
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302 | |
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303 | if ( forStmt->get_condition() ) { |
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304 | Expression * newExpr = findSingleExpression( forStmt->get_condition(), *this ); |
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305 | delete forStmt->get_condition(); |
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306 | forStmt->set_condition( newExpr ); |
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307 | } // if |
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308 | |
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309 | if ( forStmt->get_increment() ) { |
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310 | Expression * newExpr = findVoidExpression( forStmt->get_increment(), *this ); |
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311 | delete forStmt->get_increment(); |
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312 | forStmt->set_increment( newExpr ); |
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313 | } // if |
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314 | } |
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315 | |
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316 | void Resolver::visit( SwitchStmt *switchStmt ) { |
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317 | ValueGuard< Type * > oldInitContext( initContext ); |
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318 | Expression *newExpr; |
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319 | newExpr = findIntegralExpression( switchStmt->get_condition(), *this ); |
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320 | delete switchStmt->get_condition(); |
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321 | switchStmt->set_condition( newExpr ); |
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322 | |
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323 | initContext = newExpr->get_result(); |
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324 | Parent::visit( switchStmt ); |
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325 | } |
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326 | |
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327 | void Resolver::visit( CaseStmt *caseStmt ) { |
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328 | if ( caseStmt->get_condition() ) { |
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329 | assert( initContext ); |
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330 | CastExpr * castExpr = new CastExpr( caseStmt->get_condition(), initContext->clone() ); |
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331 | Expression * newExpr = findSingleExpression( castExpr, *this ); |
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332 | castExpr = safe_dynamic_cast< CastExpr * >( newExpr ); |
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333 | caseStmt->set_condition( castExpr->get_arg() ); |
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334 | castExpr->set_arg( nullptr ); |
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335 | delete castExpr; |
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336 | } |
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337 | Parent::visit( caseStmt ); |
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338 | } |
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339 | |
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340 | void Resolver::visit( BranchStmt *branchStmt ) { |
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341 | // must resolve the argument for a computed goto |
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342 | if ( branchStmt->get_type() == BranchStmt::Goto ) { // check for computed goto statement |
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343 | if ( Expression * arg = branchStmt->get_computedTarget() ) { |
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344 | VoidType v = Type::Qualifiers(); // cast to void * for the alternative finder |
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345 | PointerType pt( Type::Qualifiers(), v.clone() ); |
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346 | CastExpr * castExpr = new CastExpr( arg, pt.clone() ); |
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347 | Expression * newExpr = findSingleExpression( castExpr, *this ); // find best expression |
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348 | branchStmt->set_target( newExpr ); |
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349 | } // if |
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350 | } // if |
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351 | } |
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352 | |
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353 | void Resolver::visit( ReturnStmt *returnStmt ) { |
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354 | if ( returnStmt->get_expr() ) { |
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355 | CastExpr *castExpr = new CastExpr( returnStmt->get_expr(), functionReturn->clone() ); |
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356 | Expression *newExpr = findSingleExpression( castExpr, *this ); |
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357 | delete castExpr; |
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358 | returnStmt->set_expr( newExpr ); |
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359 | } // if |
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360 | } |
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361 | |
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362 | template< typename T > |
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363 | bool isCharType( T t ) { |
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364 | if ( BasicType * bt = dynamic_cast< BasicType * >( t ) ) { |
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365 | return bt->get_kind() == BasicType::Char || bt->get_kind() == BasicType::SignedChar || |
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366 | bt->get_kind() == BasicType::UnsignedChar; |
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367 | } |
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368 | return false; |
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369 | } |
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370 | |
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371 | void Resolver::visit( SingleInit *singleInit ) { |
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372 | if ( singleInit->get_value() ) { |
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373 | #if 0 |
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374 | if (NameExpr * ne = dynamic_cast<NameExpr*>(singleInit->get_value())) { |
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375 | string n = ne->get_name(); |
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376 | if (n == "0") { |
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377 | initContext = new BasicType(Type::Qualifiers(), |
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378 | BasicType::SignedInt); |
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379 | } else { |
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380 | DeclarationWithType * decl = lookupId( n ); |
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381 | initContext = decl->get_type(); |
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382 | } |
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383 | } else if (ConstantExpr * e = |
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384 | dynamic_cast<ConstantExpr*>(singleInit->get_value())) { |
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385 | Constant *c = e->get_constant(); |
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386 | initContext = c->get_type(); |
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387 | } else { |
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388 | assert(0); |
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389 | } |
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390 | #endif |
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391 | CastExpr *castExpr = new CastExpr( singleInit->get_value(), initContext->clone() ); |
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392 | Expression *newExpr = findSingleExpression( castExpr, *this ); |
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393 | delete castExpr; |
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394 | singleInit->set_value( newExpr ); |
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395 | |
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396 | // check if initializing type is char[] |
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397 | if ( ArrayType * at = dynamic_cast< ArrayType * >( initContext ) ) { |
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398 | if ( isCharType( at->get_base() ) ) { |
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399 | // check if the resolved type is char * |
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400 | if ( PointerType * pt = dynamic_cast< PointerType *>( newExpr->get_result() ) ) { |
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401 | if ( isCharType( pt->get_base() ) ) { |
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402 | // strip cast if we're initializing a char[] with a char *, e.g. char x[] = "hello"; |
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403 | CastExpr *ce = dynamic_cast< CastExpr * >( newExpr ); |
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404 | singleInit->set_value( ce->get_arg() ); |
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405 | ce->set_arg( NULL ); |
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406 | delete ce; |
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407 | } |
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408 | } |
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409 | } |
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410 | } |
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411 | } // if |
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412 | // singleInit->get_value()->accept( *this ); |
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413 | } |
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414 | |
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415 | template< typename AggrInst > |
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416 | TypeSubstitution makeGenericSubstitutuion( AggrInst * inst ) { |
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417 | assert( inst ); |
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418 | assert( inst->get_baseParameters() ); |
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419 | std::list< TypeDecl * > baseParams = *inst->get_baseParameters(); |
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420 | std::list< Expression * > typeSubs = inst->get_parameters(); |
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421 | TypeSubstitution subs( baseParams.begin(), baseParams.end(), typeSubs.begin() ); |
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422 | return subs; |
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423 | } |
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424 | |
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425 | ReferenceToType * isStructOrUnion( Type * type ) { |
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426 | if ( StructInstType * sit = dynamic_cast< StructInstType * >( type ) ) { |
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427 | return sit; |
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428 | } else if ( UnionInstType * uit = dynamic_cast< UnionInstType * >( type ) ) { |
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429 | return uit; |
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430 | } |
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431 | return nullptr; |
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432 | } |
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433 | |
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434 | void Resolver::resolveSingleAggrInit( Declaration * dcl, InitIterator & init, InitIterator & initEnd, TypeSubstitution sub ) { |
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435 | DeclarationWithType * dt = dynamic_cast< DeclarationWithType * >( dcl ); |
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436 | assert( dt ); |
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437 | // need to substitute for generic types, so that casts are to concrete types |
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438 | initContext = dt->get_type()->clone(); |
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439 | sub.apply( initContext ); |
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440 | |
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441 | try { |
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442 | if ( init == initEnd ) return; // stop when there are no more initializers |
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443 | (*init)->accept( *this ); |
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444 | ++init; // made it past an initializer |
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445 | } catch( SemanticError & ) { |
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446 | // need to delve deeper, if you can |
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447 | if ( ReferenceToType * type = isStructOrUnion( initContext ) ) { |
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448 | resolveAggrInit( type, init, initEnd ); |
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449 | } else { |
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450 | // member is not an aggregate type, so can't go any deeper |
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451 | |
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452 | // might need to rethink what is being thrown |
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453 | throw; |
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454 | } // if |
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455 | } |
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456 | } |
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457 | |
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458 | void Resolver::resolveAggrInit( ReferenceToType * inst, InitIterator & init, InitIterator & initEnd ) { |
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459 | if ( StructInstType * sit = dynamic_cast< StructInstType * >( inst ) ) { |
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460 | TypeSubstitution sub = makeGenericSubstitutuion( sit ); |
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461 | StructDecl * st = sit->get_baseStruct(); |
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462 | if(st->get_members().empty()) return; |
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463 | // want to resolve each initializer to the members of the struct, |
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464 | // but if there are more initializers than members we should stop |
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465 | list< Declaration * >::iterator it = st->get_members().begin(); |
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466 | for ( ; it != st->get_members().end(); ++it) { |
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467 | resolveSingleAggrInit( *it, init, initEnd, sub ); |
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468 | } |
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469 | } else if ( UnionInstType * uit = dynamic_cast< UnionInstType * >( inst ) ) { |
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470 | TypeSubstitution sub = makeGenericSubstitutuion( uit ); |
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471 | UnionDecl * un = uit->get_baseUnion(); |
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472 | if(un->get_members().empty()) return; |
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473 | // only resolve to the first member of a union |
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474 | resolveSingleAggrInit( *un->get_members().begin(), init, initEnd, sub ); |
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475 | } // if |
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476 | } |
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477 | |
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478 | void Resolver::visit( ListInit * listInit ) { |
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479 | InitIterator iter = listInit->begin(); |
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480 | InitIterator end = listInit->end(); |
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481 | |
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482 | if ( ArrayType * at = dynamic_cast< ArrayType * >( initContext ) ) { |
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483 | // resolve each member to the base type of the array |
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484 | for ( ; iter != end; ++iter ) { |
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485 | initContext = at->get_base(); |
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486 | (*iter)->accept( *this ); |
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487 | } // for |
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488 | } else if ( TupleType * tt = dynamic_cast< TupleType * > ( initContext ) ) { |
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489 | for ( Type * t : *tt ) { |
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490 | if ( iter == end ) break; |
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491 | initContext = t; |
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492 | (*iter++)->accept( *this ); |
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493 | } |
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494 | } else if ( ReferenceToType * type = isStructOrUnion( initContext ) ) { |
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495 | resolveAggrInit( type, iter, end ); |
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496 | } else if ( TypeInstType * tt = dynamic_cast< TypeInstType * >( initContext ) ) { |
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497 | Type * base = tt->get_baseType()->get_base(); |
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498 | if ( base ) { |
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499 | // know the implementation type, so try using that as the initContext |
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500 | initContext = base; |
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501 | visit( listInit ); |
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502 | } else { |
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503 | // missing implementation type -- might be an unknown type variable, so try proceeding with the current init context |
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504 | Parent::visit( listInit ); |
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505 | } |
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506 | } else { |
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507 | assert( dynamic_cast< BasicType * >( initContext ) || dynamic_cast< PointerType * >( initContext ) |
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508 | || dynamic_cast< ZeroType * >( initContext ) || dynamic_cast< OneType * >( initContext ) || dynamic_cast < EnumInstType * > ( initContext ) ); |
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509 | // basic types are handled here |
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510 | Parent::visit( listInit ); |
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511 | } |
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512 | |
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513 | #if 0 |
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514 | if ( ArrayType *at = dynamic_cast<ArrayType*>(initContext) ) { |
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515 | std::list<Initializer *>::iterator iter( listInit->begin_initializers() ); |
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516 | for ( ; iter != listInit->end_initializers(); ++iter ) { |
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517 | initContext = at->get_base(); |
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518 | (*iter)->accept( *this ); |
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519 | } // for |
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520 | } else if ( StructInstType *st = dynamic_cast<StructInstType*>(initContext) ) { |
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521 | StructDecl *baseStruct = st->get_baseStruct(); |
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522 | std::list<Declaration *>::iterator iter1( baseStruct->get_members().begin() ); |
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523 | std::list<Initializer *>::iterator iter2( listInit->begin_initializers() ); |
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524 | for ( ; iter1 != baseStruct->get_members().end() && iter2 != listInit->end_initializers(); ++iter2 ) { |
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525 | if ( (*iter2)->get_designators().empty() ) { |
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526 | DeclarationWithType *dt = dynamic_cast<DeclarationWithType *>( *iter1 ); |
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527 | initContext = dt->get_type(); |
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528 | (*iter2)->accept( *this ); |
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529 | ++iter1; |
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530 | } else { |
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531 | StructDecl *st = baseStruct; |
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532 | iter1 = st->get_members().begin(); |
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533 | std::list<Expression *>::iterator iter3( (*iter2)->get_designators().begin() ); |
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534 | for ( ; iter3 != (*iter2)->get_designators().end(); ++iter3 ) { |
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535 | NameExpr *key = dynamic_cast<NameExpr *>( *iter3 ); |
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536 | assert( key ); |
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537 | for ( ; iter1 != st->get_members().end(); ++iter1 ) { |
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538 | if ( key->get_name() == (*iter1)->get_name() ) { |
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539 | (*iter1)->print( cout ); |
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540 | cout << key->get_name() << endl; |
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541 | ObjectDecl *fred = dynamic_cast<ObjectDecl *>( *iter1 ); |
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542 | assert( fred ); |
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543 | StructInstType *mary = dynamic_cast<StructInstType*>( fred->get_type() ); |
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544 | assert( mary ); |
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545 | st = mary->get_baseStruct(); |
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546 | iter1 = st->get_members().begin(); |
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547 | break; |
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548 | } // if |
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549 | } // for |
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550 | } // for |
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551 | ObjectDecl *fred = dynamic_cast<ObjectDecl *>( *iter1 ); |
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552 | assert( fred ); |
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553 | initContext = fred->get_type(); |
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554 | (*listInit->begin_initializers())->accept( *this ); |
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555 | } // if |
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556 | } // for |
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557 | } else if ( UnionInstType *st = dynamic_cast<UnionInstType*>(initContext) ) { |
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558 | DeclarationWithType *dt = dynamic_cast<DeclarationWithType *>( *st->get_baseUnion()->get_members().begin() ); |
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559 | initContext = dt->get_type(); |
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560 | (*listInit->begin_initializers())->accept( *this ); |
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561 | } // if |
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562 | #endif |
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563 | } |
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564 | |
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565 | // ConstructorInit - fall back on C-style initializer |
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566 | void Resolver::fallbackInit( ConstructorInit * ctorInit ) { |
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567 | // could not find valid constructor, or found an intrinsic constructor |
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568 | // fall back on C-style initializer |
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569 | delete ctorInit->get_ctor(); |
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570 | ctorInit->set_ctor( NULL ); |
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571 | delete ctorInit->get_dtor(); |
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572 | ctorInit->set_dtor( NULL ); |
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573 | maybeAccept( ctorInit->get_init(), *this ); |
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574 | } |
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575 | |
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576 | // needs to be callable from outside the resolver, so this is a standalone function |
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577 | void resolveCtorInit( ConstructorInit * ctorInit, const SymTab::Indexer & indexer ) { |
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578 | assert( ctorInit ); |
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579 | Resolver resolver( indexer ); |
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580 | ctorInit->accept( resolver ); |
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581 | } |
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582 | |
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583 | void resolveStmtExpr( StmtExpr * stmtExpr, const SymTab::Indexer & indexer ) { |
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584 | assert( stmtExpr ); |
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585 | Resolver resolver( indexer ); |
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586 | stmtExpr->accept( resolver ); |
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587 | } |
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588 | |
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589 | void Resolver::visit( ConstructorInit *ctorInit ) { |
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590 | // xxx - fallback init has been removed => remove fallbackInit function and remove complexity from FixInit and remove C-init from ConstructorInit |
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591 | maybeAccept( ctorInit->get_ctor(), *this ); |
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592 | maybeAccept( ctorInit->get_dtor(), *this ); |
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593 | |
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594 | // found a constructor - can get rid of C-style initializer |
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595 | delete ctorInit->get_init(); |
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596 | ctorInit->set_init( NULL ); |
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597 | |
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598 | // intrinsic single parameter constructors and destructors do nothing. Since this was |
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599 | // implicitly generated, there's no way for it to have side effects, so get rid of it |
---|
600 | // to clean up generated code. |
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601 | if ( InitTweak::isIntrinsicSingleArgCallStmt( ctorInit->get_ctor() ) ) { |
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602 | delete ctorInit->get_ctor(); |
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603 | ctorInit->set_ctor( NULL ); |
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604 | } |
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605 | |
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606 | if ( InitTweak::isIntrinsicSingleArgCallStmt( ctorInit->get_dtor() ) ) { |
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607 | delete ctorInit->get_dtor(); |
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608 | ctorInit->set_dtor( NULL ); |
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609 | } |
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610 | |
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611 | // xxx - todo -- what about arrays? |
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612 | // if ( dtor == NULL && InitTweak::isIntrinsicCallStmt( ctorInit->get_ctor() ) ) { |
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613 | // // can reduce the constructor down to a SingleInit using the |
---|
614 | // // second argument from the ctor call, since |
---|
615 | // delete ctorInit->get_ctor(); |
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616 | // ctorInit->set_ctor( NULL ); |
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617 | |
---|
618 | // Expression * arg = |
---|
619 | // ctorInit->set_init( new SingleInit( arg ) ); |
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620 | // } |
---|
621 | } |
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622 | } // namespace ResolvExpr |
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623 | |
---|
624 | // Local Variables: // |
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625 | // tab-width: 4 // |
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626 | // mode: c++ // |
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627 | // compile-command: "make install" // |
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628 | // End: // |
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