| 1 | /* |
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| 2 | * This file is part of the Cforall project |
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| 3 | * |
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| 4 | * $Id: TypeEnvironment.h,v 1.8 2005/08/29 20:14:16 rcbilson Exp $ |
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| 5 | * |
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| 6 | */ |
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| 7 | |
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| 8 | #ifndef RESOLVEXPR_TYPEENVIRONMENT_H |
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| 9 | #define RESOLVEXPR_TYPEENVIRONMENT_H |
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| 10 | |
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| 11 | #include <string> |
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| 12 | #include <set> |
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| 13 | #include <list> |
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| 14 | #include <iostream> |
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| 15 | |
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| 16 | #include "SynTree/SynTree.h" |
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| 17 | #include "SynTree/Type.h" |
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| 18 | #include "SynTree/TypeSubstitution.h" |
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| 19 | #include "SynTree/Declaration.h" |
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| 20 | |
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| 21 | namespace ResolvExpr { |
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| 22 | |
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| 23 | typedef std::map< DeclarationWithType*, bool > AssertionSet; |
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| 24 | typedef std::map< std::string, TypeDecl::Kind > OpenVarSet; |
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| 25 | |
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| 26 | void printAssertionSet( const AssertionSet &, std::ostream &, int indent = 0 ); |
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| 27 | void printOpenVarSet( const OpenVarSet &, std::ostream &, int indent = 0 ); |
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| 28 | |
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| 29 | struct EqvClass |
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| 30 | { |
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| 31 | std::set< std::string > vars; |
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| 32 | Type *type; |
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| 33 | bool allowWidening; |
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| 34 | TypeDecl::Kind kind; |
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| 35 | |
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| 36 | void initialize( const EqvClass &src, EqvClass &dest ); |
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| 37 | EqvClass(); |
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| 38 | EqvClass( const EqvClass &other ); |
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| 39 | EqvClass &operator=( const EqvClass &other ); |
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| 40 | ~EqvClass(); |
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| 41 | void print( std::ostream &os, int indent = 0 ) const; |
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| 42 | }; |
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| 43 | |
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| 44 | class TypeEnvironment |
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| 45 | { |
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| 46 | public: |
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| 47 | bool lookup( const std::string &var, EqvClass &eqvClass ) const; |
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| 48 | void add( const EqvClass &eqvClass ); |
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| 49 | void add( const std::list< TypeDecl* > &tyDecls ); |
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| 50 | template< typename SynTreeClass > int apply( SynTreeClass *&type ) const; |
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| 51 | template< typename SynTreeClass > int applyFree( SynTreeClass *&type ) const; |
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| 52 | void makeSubstitution( TypeSubstitution &result ) const; |
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| 53 | bool isEmpty() const { return env.empty(); } |
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| 54 | void print( std::ostream &os, int indent = 0 ) const; |
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| 55 | void combine( const TypeEnvironment &second, Type *(*combineFunc)( Type*, Type* ) ); |
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| 56 | void simpleCombine( const TypeEnvironment &second ); |
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| 57 | void extractOpenVars( OpenVarSet &openVars ) const; |
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| 58 | TypeEnvironment *clone() const { return new TypeEnvironment( *this ); } |
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| 59 | |
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| 60 | typedef std::list< EqvClass >::iterator iterator; |
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| 61 | iterator begin() { return env.begin(); } |
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| 62 | iterator end() { return env.end(); } |
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| 63 | typedef std::list< EqvClass >::const_iterator const_iterator; |
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| 64 | const_iterator begin() const { return env.begin(); } |
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| 65 | const_iterator end() const { return env.end(); } |
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| 66 | private: |
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| 67 | std::list< EqvClass > env; |
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| 68 | |
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| 69 | std::list< EqvClass >::iterator internal_lookup( const std::string &var ); |
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| 70 | }; |
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| 71 | |
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| 72 | template< typename SynTreeClass > |
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| 73 | int |
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| 74 | TypeEnvironment::apply( SynTreeClass *&type ) const |
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| 75 | { |
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| 76 | TypeSubstitution sub; |
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| 77 | makeSubstitution( sub ); |
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| 78 | return sub.apply( type ); |
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| 79 | } |
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| 80 | |
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| 81 | template< typename SynTreeClass > |
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| 82 | int |
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| 83 | TypeEnvironment::applyFree( SynTreeClass *&type ) const |
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| 84 | { |
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| 85 | TypeSubstitution sub; |
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| 86 | makeSubstitution( sub ); |
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| 87 | return sub.applyFree( type ); |
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| 88 | } |
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| 89 | |
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| 90 | } // namespace ResolvExpr |
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| 91 | |
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| 92 | #endif /* #ifndef RESOLVEXPR_TYPEENVIRONMENT_H */ |
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