| 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 | // Unify.h --
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| 8 | //
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| 9 | // Author : Richard C. Bilson
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| 10 | // Created On : Sun May 17 13:09:04 2015
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| 11 | // Last Modified By : Peter A. Buhr
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| 12 | // Last Modified On : Fri Jul 21 23:09:34 2017
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| 13 | // Update Count : 3
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| 14 | //
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| 15 |
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| 16 | #pragma once
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| 17 |
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| 18 | #include <list> // for list
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| 19 |
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| 20 | #include "Common/utility.h" // for deleteAll
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| 21 | #include "SynTree/Declaration.h" // for TypeDecl, TypeDecl::Data
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| 22 | #include "TypeEnvironment.h" // for AssertionSet, OpenVarSet
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| 23 |
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| 24 | class Type;
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| 25 | class TypeInstType;
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| 26 | namespace SymTab {
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| 27 | class Indexer;
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| 28 | } // namespace SymTab
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| 29 |
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| 30 | namespace ResolvExpr {
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| 31 | struct WidenMode {
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| 32 | WidenMode( bool widenFirst, bool widenSecond ): widenFirst( widenFirst ), widenSecond( widenSecond ) {}
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| 33 | WidenMode &operator|=( const WidenMode &other ) { widenFirst |= other.widenFirst; widenSecond |= other.widenSecond; return *this; }
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| 34 | WidenMode &operator&=( const WidenMode &other ) { widenFirst &= other.widenFirst; widenSecond &= other.widenSecond; return *this; }
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| 35 | WidenMode operator|( const WidenMode &other ) { WidenMode newWM( *this ); newWM |= other; return newWM; }
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| 36 | WidenMode operator&( const WidenMode &other ) { WidenMode newWM( *this ); newWM &= other; return newWM; }
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| 37 | operator bool() { return widenFirst && widenSecond; }
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| 38 |
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| 39 | bool widenFirst : 1, widenSecond : 1;
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| 40 | };
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| 41 |
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| 42 | bool bindVar( TypeInstType *typeInst, Type *other, const TypeDecl::Data & data, TypeEnvironment &env, AssertionSet &needAssertions, AssertionSet &haveAssertions, const OpenVarSet &openVars, WidenMode widenMode, const SymTab::Indexer &indexer );
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| 43 | bool unify( Type *type1, Type *type2, TypeEnvironment &env, AssertionSet &needAssertions, AssertionSet &haveAssertions, OpenVarSet &openVars, const SymTab::Indexer &indexer );
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| 44 | bool unify( Type *type1, Type *type2, TypeEnvironment &env, AssertionSet &needAssertions, AssertionSet &haveAssertions, OpenVarSet &openVars, const SymTab::Indexer &indexer, Type *&commonType );
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| 45 | bool unifyExact( Type *type1, Type *type2, TypeEnvironment &env, AssertionSet &needAssertions, AssertionSet &haveAssertions, OpenVarSet &openVars, const SymTab::Indexer &indexer );
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| 46 |
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| 47 | template< typename Iterator1, typename Iterator2 >
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| 48 | bool unifyList( Iterator1 list1Begin, Iterator1 list1End, Iterator2 list2Begin, Iterator2 list2End, TypeEnvironment &env, AssertionSet &needAssertions, AssertionSet &haveAssertions, OpenVarSet &openVars, const SymTab::Indexer &indexer, std::list< Type* > &commonTypes ) {
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| 49 | for ( ; list1Begin != list1End && list2Begin != list2End; ++list1Begin, ++list2Begin ) {
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| 50 | Type *commonType = 0;
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| 51 | if ( ! unify( *list1Begin, *list2Begin, env, needAssertions, haveAssertions, openVars, indexer, commonType ) ) {
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| 52 | return false;
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| 53 | } // if
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| 54 | commonTypes.push_back( commonType );
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| 55 | } // for
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| 56 | if ( list1Begin != list1End || list2Begin != list2End ) {
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| 57 | return false;
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| 58 | } else {
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| 59 | return true;
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| 60 | } // if
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| 61 | }
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| 62 |
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| 63 | template< typename Iterator1, typename Iterator2 >
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| 64 | bool unifyList( Iterator1 list1Begin, Iterator1 list1End, Iterator2 list2Begin, Iterator2 list2End, TypeEnvironment &env, AssertionSet &needAssertions, AssertionSet &haveAssertions, OpenVarSet &openVars, const SymTab::Indexer &indexer ) {
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| 65 | std::list< Type* > commonTypes;
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| 66 | if ( unifyList( list1Begin, list1End, list2Begin, list2End, env, needAssertions, haveAssertions, openVars, indexer, commonTypes ) ) {
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| 67 | deleteAll( commonTypes );
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| 68 | return true;
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| 69 | } else {
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| 70 | return false;
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| 71 | } // if
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| 72 | }
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| 73 |
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| 74 | } // namespace ResolvExpr
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| 75 |
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| 76 | // Local Variables: //
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| 77 | // tab-width: 4 //
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| 78 | // mode: c++ //
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| 79 | // compile-command: "make install" //
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| 80 | // End: //
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