| 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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