[a32b204] | 1 | // |
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| 2 | // Cforall Version 1.0.0 Copyright (C) 2015 University of Waterloo |
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| 3 | // |
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| 4 | // The contents of this file are covered under the licence agreement in the |
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| 5 | // file "LICENCE" distributed with Cforall. |
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| 6 | // |
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| 7 | // PtrsCastable.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 11:48:00 2015 |
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[1521de20] | 11 | // Last Modified By : Rob Schluntz |
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| 12 | // Last Modified On : Mon Oct 05 14:49:12 2015 |
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| 13 | // Update Count : 7 |
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[a32b204] | 14 | // |
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[51b7345] | 15 | |
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| 16 | #include "typeops.h" |
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| 17 | #include "SynTree/Type.h" |
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| 18 | #include "SynTree/Declaration.h" |
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| 19 | #include "SynTree/Visitor.h" |
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| 20 | #include "SymTab/Indexer.h" |
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| 21 | |
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| 22 | |
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| 23 | namespace ResolvExpr { |
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[a32b204] | 24 | class PtrsCastable : public Visitor { |
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| 25 | public: |
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| 26 | PtrsCastable( Type *dest, const TypeEnvironment &env, const SymTab::Indexer &indexer ); |
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[51b7345] | 27 | |
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[a32b204] | 28 | int get_result() const { return result; } |
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| 29 | |
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| 30 | virtual void visit(VoidType *voidType); |
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| 31 | virtual void visit(BasicType *basicType); |
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| 32 | virtual void visit(PointerType *pointerType); |
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| 33 | virtual void visit(ArrayType *arrayType); |
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| 34 | virtual void visit(FunctionType *functionType); |
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| 35 | virtual void visit(StructInstType *inst); |
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| 36 | virtual void visit(UnionInstType *inst); |
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| 37 | virtual void visit(EnumInstType *inst); |
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| 38 | virtual void visit(ContextInstType *inst); |
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| 39 | virtual void visit(TypeInstType *inst); |
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| 40 | virtual void visit(TupleType *tupleType); |
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[44b7088] | 41 | virtual void visit(VarArgsType *varArgsType); |
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[a32b204] | 42 | private: |
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| 43 | Type *dest; |
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| 44 | int result; |
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| 45 | const TypeEnvironment &env; |
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| 46 | const SymTab::Indexer &indexer; |
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| 47 | }; |
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| 48 | |
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| 49 | int objectCast( Type *src, const TypeEnvironment &env, const SymTab::Indexer &indexer ) { |
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| 50 | if ( dynamic_cast< FunctionType* >( src ) ) { |
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| 51 | return -1; |
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| 52 | } else if ( TypeInstType *typeInst = dynamic_cast< TypeInstType* >( src ) ) { |
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| 53 | EqvClass eqvClass; |
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| 54 | if ( NamedTypeDecl *ntDecl = indexer.lookupType( typeInst->get_name() ) ) { |
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| 55 | if ( TypeDecl *tyDecl = dynamic_cast< TypeDecl* >( ntDecl ) ) { |
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| 56 | if ( tyDecl->get_kind() == TypeDecl::Ftype ) { |
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| 57 | return -1; |
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| 58 | } // if |
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| 59 | } //if |
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| 60 | } else if ( env.lookup( typeInst->get_name(), eqvClass ) ) { |
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| 61 | if ( eqvClass.kind == TypeDecl::Ftype ) { |
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| 62 | return -1; |
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| 63 | } // if |
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| 64 | } // if |
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| 65 | } //if |
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| 66 | return 1; |
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| 67 | } |
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| 68 | |
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| 69 | int ptrsCastable( Type *src, Type *dest, const TypeEnvironment &env, const SymTab::Indexer &indexer ) { |
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| 70 | if ( TypeInstType *destAsTypeInst = dynamic_cast< TypeInstType* >( dest ) ) { |
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| 71 | EqvClass eqvClass; |
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| 72 | if ( env.lookup( destAsTypeInst->get_name(), eqvClass ) ) { |
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| 73 | return ptrsAssignable( src, eqvClass.type, env ); |
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| 74 | } // if |
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| 75 | } // if |
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| 76 | if ( dynamic_cast< VoidType* >( dest ) ) { |
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| 77 | return objectCast( src, env, indexer ); |
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| 78 | } else { |
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| 79 | PtrsCastable ptrs( dest, env, indexer ); |
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| 80 | src->accept( ptrs ); |
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| 81 | return ptrs.get_result(); |
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| 82 | } // if |
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| 83 | } |
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| 84 | |
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| 85 | PtrsCastable::PtrsCastable( Type *dest, const TypeEnvironment &env, const SymTab::Indexer &indexer ) |
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| 86 | : dest( dest ), result( 0 ), env( env ), indexer( indexer ) { |
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| 87 | } |
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| 88 | |
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| 89 | void PtrsCastable::visit(VoidType *voidType) { |
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| 90 | result = objectCast( dest, env, indexer ); |
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| 91 | } |
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| 92 | |
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| 93 | void PtrsCastable::visit(BasicType *basicType) { |
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| 94 | result = objectCast( dest, env, indexer ); |
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| 95 | } |
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| 96 | |
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| 97 | void PtrsCastable::visit(PointerType *pointerType) { |
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| 98 | result = objectCast( dest, env, indexer ); |
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| 99 | } |
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| 100 | |
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| 101 | void PtrsCastable::visit(ArrayType *arrayType) { |
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| 102 | result = objectCast( dest, env, indexer ); |
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| 103 | } |
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| 104 | |
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| 105 | void PtrsCastable::visit(FunctionType *functionType) { |
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| 106 | result = -1; |
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| 107 | } |
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| 108 | |
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| 109 | void PtrsCastable::visit(StructInstType *inst) { |
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| 110 | result = objectCast( dest, env, indexer ); |
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| 111 | } |
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| 112 | |
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| 113 | void PtrsCastable::visit(UnionInstType *inst) { |
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| 114 | result = objectCast( dest, env, indexer ); |
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| 115 | } |
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| 116 | |
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| 117 | void PtrsCastable::visit(EnumInstType *inst) { |
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| 118 | if ( dynamic_cast< EnumInstType* >( inst ) ) { |
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| 119 | result = 1; |
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| 120 | } else if ( BasicType *bt = dynamic_cast< BasicType* >( inst ) ) { |
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| 121 | if ( bt->get_kind() == BasicType::SignedInt ) { |
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| 122 | result = 0; |
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| 123 | } else { |
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| 124 | result = 1; |
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| 125 | } |
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| 126 | } else { |
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| 127 | result = objectCast( dest, env, indexer ); |
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| 128 | } |
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| 129 | } |
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| 130 | |
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| 131 | void PtrsCastable::visit(ContextInstType *inst) { |
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| 132 | // I definitely don't think we should be doing anything here |
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| 133 | } |
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| 134 | |
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| 135 | void PtrsCastable::visit(TypeInstType *inst) { |
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[1521de20] | 136 | result = objectCast( inst, env, indexer ) > 0 && objectCast( dest, env, indexer ) > 0 ? 1 : -1; |
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[a32b204] | 137 | } |
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| 138 | |
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| 139 | void PtrsCastable::visit(TupleType *tupleType) { |
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| 140 | result = objectCast( dest, env, indexer ); |
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| 141 | } |
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[44b7088] | 142 | |
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| 143 | void PtrsCastable::visit(VarArgsType *varArgsType) { |
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| 144 | result = objectCast( dest, env, indexer ); |
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| 145 | } |
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[51b7345] | 146 | } // namespace ResolvExpr |
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[a32b204] | 147 | |
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| 148 | // Local Variables: // |
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| 149 | // tab-width: 4 // |
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| 150 | // mode: c++ // |
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| 151 | // compile-command: "make install" // |
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| 152 | // End: // |
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