[0dd3a2f] | 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 | // TypeSubstitution.h -- |
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| 8 | // |
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| 9 | // Author : Richard C. Bilson |
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| 10 | // Created On : Mon May 18 07:44:20 2015 |
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| 11 | // Last Modified By : Peter A. Buhr |
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[4040425] | 12 | // Last Modified On : Wed Mar 2 17:33:19 2016 |
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| 13 | // Update Count : 2 |
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[0dd3a2f] | 14 | // |
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[51b7345] | 15 | |
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[0dd3a2f] | 16 | #ifndef TYPESUBSTITUTION_H |
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| 17 | #define TYPESUBSTITUTION_H |
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[51b7345] | 18 | |
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| 19 | #include <map> |
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| 20 | #include <set> |
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| 21 | #include <cassert> |
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| 22 | |
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| 23 | #include "SynTree/Mutator.h" |
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| 24 | #include "SynTree/Declaration.h" |
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| 25 | #include "SynTree/Expression.h" |
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| 26 | |
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[0dd3a2f] | 27 | class TypeSubstitution : public Mutator { |
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| 28 | typedef Mutator Parent; |
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| 29 | public: |
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| 30 | TypeSubstitution(); |
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| 31 | template< typename FormalIterator, typename ActualIterator > |
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| 32 | TypeSubstitution( FormalIterator formalBegin, FormalIterator formalEnd, ActualIterator actualBegin ); |
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| 33 | TypeSubstitution( const TypeSubstitution &other ); |
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| 34 | virtual ~TypeSubstitution(); |
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| 35 | |
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| 36 | TypeSubstitution &operator=( const TypeSubstitution &other ); |
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| 37 | |
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| 38 | template< typename SynTreeClass > int apply( SynTreeClass *&input ); |
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| 39 | template< typename SynTreeClass > int applyFree( SynTreeClass *&input ); |
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| 40 | |
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| 41 | void add( std::string formalType, Type *actualType ); |
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| 42 | void add( const TypeSubstitution &other ); |
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| 43 | void remove( std::string formalType ); |
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| 44 | Type *lookup( std::string formalType ) const; |
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| 45 | bool empty() const; |
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| 46 | |
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| 47 | template< typename FormalIterator, typename ActualIterator > |
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| 48 | void add( FormalIterator formalBegin, FormalIterator formalEnd, ActualIterator actualBegin ); |
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| 49 | |
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| 50 | template< typename TypeInstListIterator > |
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| 51 | void extract( TypeInstListIterator begin, TypeInstListIterator end, TypeSubstitution &result ); |
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| 52 | |
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| 53 | void normalize(); |
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[51b7345] | 54 | |
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[0dd3a2f] | 55 | void print( std::ostream &os, int indent = 0 ) const; |
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| 56 | TypeSubstitution *clone() const { return new TypeSubstitution( *this ); } |
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| 57 | private: |
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| 58 | virtual Type* mutate(TypeInstType *aggregateUseType); |
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| 59 | virtual Expression* mutate(NameExpr *nameExpr); |
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[37a3b8f9] | 60 | |
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| 61 | /// Records type variable bindings from forall-statements |
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[0dd3a2f] | 62 | template< typename TypeClass > Type *handleType( TypeClass *type ); |
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[37a3b8f9] | 63 | /// Records type variable bindings from forall-statements and instantiations of generic types |
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| 64 | template< typename TypeClass > Type *handleAggregateType( TypeClass *type ); |
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[0dd3a2f] | 65 | |
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| 66 | virtual Type* mutate(VoidType *basicType); |
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| 67 | virtual Type* mutate(BasicType *basicType); |
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| 68 | virtual Type* mutate(PointerType *pointerType); |
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| 69 | virtual Type* mutate(ArrayType *arrayType); |
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| 70 | virtual Type* mutate(FunctionType *functionType); |
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| 71 | virtual Type* mutate(StructInstType *aggregateUseType); |
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| 72 | virtual Type* mutate(UnionInstType *aggregateUseType); |
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| 73 | virtual Type* mutate(EnumInstType *aggregateUseType); |
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[4040425] | 74 | virtual Type* mutate(TraitInstType *aggregateUseType); |
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[0dd3a2f] | 75 | virtual Type* mutate(TupleType *tupleType); |
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[44b7088] | 76 | virtual Type* mutate(VarArgsType *varArgsType); |
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[0dd3a2f] | 77 | |
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| 78 | // TODO: worry about traversing into a forall-qualified function type or type decl with assertions |
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| 79 | |
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| 80 | void initialize( const TypeSubstitution &src, TypeSubstitution &dest ); |
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[51b7345] | 81 | |
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[0dd3a2f] | 82 | typedef std::map< std::string, Type* > TypeEnvType; |
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| 83 | typedef std::map< std::string, Expression* > VarEnvType; |
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| 84 | typedef std::set< std::string > BoundVarsType; |
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| 85 | TypeEnvType typeEnv; |
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| 86 | VarEnvType varEnv; |
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| 87 | BoundVarsType boundVars; |
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| 88 | int subCount; |
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| 89 | bool freeOnly; |
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[51b7345] | 90 | }; |
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| 91 | |
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| 92 | template< typename FormalIterator, typename ActualIterator > |
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[0dd3a2f] | 93 | void TypeSubstitution::add( FormalIterator formalBegin, FormalIterator formalEnd, ActualIterator actualBegin ) { |
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| 94 | // FormalIterator points to a TypeDecl |
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| 95 | // ActualIterator points to a Type |
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| 96 | FormalIterator formalIt = formalBegin; |
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| 97 | ActualIterator actualIt = actualBegin; |
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| 98 | for ( ; formalIt != formalEnd; ++formalIt, ++actualIt ) { |
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| 99 | if ( TypeDecl *formal = dynamic_cast< TypeDecl* >( *formalIt ) ) { |
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| 100 | if ( TypeExpr *actual = dynamic_cast< TypeExpr* >( *actualIt ) ) { |
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| 101 | if ( formal->get_name() != "" ) { |
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| 102 | TypeEnvType::iterator i = typeEnv.find( formal->get_name() ); |
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| 103 | if ( i != typeEnv.end() ) { |
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| 104 | delete i->second; |
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| 105 | } // if |
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| 106 | typeEnv[ formal->get_name() ] = actual->get_type()->clone(); |
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| 107 | } // if |
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| 108 | } else { |
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| 109 | throw SemanticError( "Attempt to provide non-type parameter for type parameter", formal ); |
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| 110 | } // if |
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| 111 | } else { |
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| 112 | // TODO: type check the formal and actual parameters |
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| 113 | if ( (*formalIt)->get_name() != "" ) { |
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| 114 | varEnv[ (*formalIt)->get_name() ] = (*actualIt)->clone(); |
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| 115 | } // if |
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| 116 | } // if |
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| 117 | } // for |
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[51b7345] | 118 | } |
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| 119 | |
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| 120 | template< typename FormalIterator, typename ActualIterator > |
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| 121 | TypeSubstitution::TypeSubstitution( FormalIterator formalBegin, FormalIterator formalEnd, ActualIterator actualBegin ) |
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| 122 | { |
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[0dd3a2f] | 123 | add( formalBegin, formalEnd, actualBegin ); |
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[51b7345] | 124 | } |
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| 125 | |
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| 126 | template< typename SynTreeClass > |
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[0dd3a2f] | 127 | int TypeSubstitution::apply( SynTreeClass *&input ) { |
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| 128 | assert( input ); |
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| 129 | subCount = 0; |
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| 130 | freeOnly = false; |
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| 131 | input = dynamic_cast< SynTreeClass *>( input->acceptMutator( *this ) ); |
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| 132 | assert( input ); |
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[51b7345] | 133 | /// std::cout << "substitution result is: "; |
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| 134 | /// newType->print( std::cout ); |
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| 135 | /// std::cout << std::endl; |
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[0dd3a2f] | 136 | return subCount; |
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[51b7345] | 137 | } |
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[0dd3a2f] | 138 | |
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[51b7345] | 139 | template< typename SynTreeClass > |
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[0dd3a2f] | 140 | int TypeSubstitution::applyFree( SynTreeClass *&input ) { |
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| 141 | assert( input ); |
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| 142 | subCount = 0; |
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| 143 | freeOnly = true; |
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| 144 | input = dynamic_cast< SynTreeClass *>( input->acceptMutator( *this ) ); |
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| 145 | assert( input ); |
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[51b7345] | 146 | /// std::cout << "substitution result is: "; |
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| 147 | /// newType->print( std::cout ); |
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| 148 | /// std::cout << std::endl; |
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[0dd3a2f] | 149 | return subCount; |
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[51b7345] | 150 | } |
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[0dd3a2f] | 151 | |
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[51b7345] | 152 | template< typename TypeInstListIterator > |
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[0dd3a2f] | 153 | void TypeSubstitution::extract( TypeInstListIterator begin, TypeInstListIterator end, TypeSubstitution &result ) { |
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| 154 | while ( begin != end ) { |
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| 155 | TypeEnvType::iterator cur = typeEnv.find( (*begin++)->get_name() ); |
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| 156 | if ( cur != typeEnv.end() ) { |
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| 157 | result.typeEnv[ cur->first ] = cur->second; |
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| 158 | typeEnv.erase( cur ); |
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| 159 | } // if |
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| 160 | } // while |
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[51b7345] | 161 | } |
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| 162 | |
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[82dd287] | 163 | /// Instantiate each member of the context given the actual parameters specified, and store the |
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| 164 | /// instantiations for use by the indexer |
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[51b7345] | 165 | template< typename FormalIterator, typename ActualIterator, typename MemberIterator, typename OutputIterator > |
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[0dd3a2f] | 166 | void applySubstitution( FormalIterator formalBegin, FormalIterator formalEnd, ActualIterator actual, MemberIterator memberBegin, MemberIterator memberEnd, OutputIterator out ) { |
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| 167 | TypeSubstitution sub = TypeSubstitution( formalBegin, formalEnd, actual ); |
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| 168 | for ( std::list< Declaration* >::iterator i = memberBegin; i != memberEnd; ++i ) { |
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| 169 | Declaration *newdecl = (*i)->clone(); |
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| 170 | sub.apply( newdecl ); |
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| 171 | *out++ = newdecl; |
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| 172 | } // for |
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[51b7345] | 173 | } |
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| 174 | |
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[0dd3a2f] | 175 | #endif // TYPESUBSTITUTION_H |
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[51b7345] | 176 | |
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[0dd3a2f] | 177 | // Local Variables: // |
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| 178 | // tab-width: 4 // |
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| 179 | // mode: c++ // |
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| 180 | // compile-command: "make install" // |
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| 181 | // End: // |
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