| 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 <map> |
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| 19 | #include <list> |
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| 20 | #include "SynTree/SynTree.h" |
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| 21 | #include "SynTree/Type.h" |
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| 22 | #include "SynTree/Declaration.h" |
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| 23 | #include "SymTab/Indexer.h" |
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| 24 | #include "TypeEnvironment.h" |
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| 25 | #include "Common/utility.h" |
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| 26 | |
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| 27 | namespace ResolvExpr { |
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| 28 | struct WidenMode { |
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| 29 | WidenMode( bool widenFirst, bool widenSecond ): widenFirst( widenFirst ), widenSecond( widenSecond ) {} |
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| 30 | WidenMode &operator|=( const WidenMode &other ) { widenFirst |= other.widenFirst; widenSecond |= other.widenSecond; return *this; } |
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| 31 | WidenMode &operator&=( const WidenMode &other ) { widenFirst &= other.widenFirst; widenSecond &= other.widenSecond; return *this; } |
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| 32 | WidenMode operator|( const WidenMode &other ) { WidenMode newWM( *this ); newWM |= other; return newWM; } |
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| 33 | WidenMode operator&( const WidenMode &other ) { WidenMode newWM( *this ); newWM &= other; return newWM; } |
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| 34 | operator bool() { return widenFirst && widenSecond; } |
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| 35 | |
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| 36 | bool widenFirst : 1, widenSecond : 1; |
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| 37 | }; |
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| 38 | |
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| 39 | 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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| 40 | bool unify( Type *type1, Type *type2, TypeEnvironment &env, AssertionSet &needAssertions, AssertionSet &haveAssertions, OpenVarSet &openVars, const SymTab::Indexer &indexer ); |
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| 41 | bool unify( Type *type1, Type *type2, TypeEnvironment &env, AssertionSet &needAssertions, AssertionSet &haveAssertions, OpenVarSet &openVars, const SymTab::Indexer &indexer, Type *&commonType ); |
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| 42 | bool unifyExact( Type *type1, Type *type2, TypeEnvironment &env, AssertionSet &needAssertions, AssertionSet &haveAssertions, OpenVarSet &openVars, const SymTab::Indexer &indexer ); |
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| 43 | |
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| 44 | template< typename Iterator1, typename Iterator2 > |
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| 45 | 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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| 46 | for ( ; list1Begin != list1End && list2Begin != list2End; ++list1Begin, ++list2Begin ) { |
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| 47 | Type *commonType = 0; |
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| 48 | if ( ! unify( *list1Begin, *list2Begin, env, needAssertions, haveAssertions, openVars, indexer, commonType ) ) { |
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| 49 | return false; |
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| 50 | } // if |
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| 51 | commonTypes.push_back( commonType ); |
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| 52 | } // for |
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| 53 | if ( list1Begin != list1End || list2Begin != list2End ) { |
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| 54 | return false; |
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| 55 | } else { |
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| 56 | return true; |
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| 57 | } // if |
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| 58 | } |
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| 59 | |
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| 60 | template< typename Iterator1, typename Iterator2 > |
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| 61 | 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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| 62 | std::list< Type* > commonTypes; |
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| 63 | if ( unifyList( list1Begin, list1End, list2Begin, list2End, env, needAssertions, haveAssertions, openVars, indexer, commonTypes ) ) { |
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| 64 | deleteAll( commonTypes ); |
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| 65 | return true; |
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| 66 | } else { |
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| 67 | return false; |
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| 68 | } // if |
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| 69 | } |
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| 70 | |
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| 71 | } // namespace ResolvExpr |
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| 72 | |
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| 73 | // Local Variables: // |
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| 74 | // tab-width: 4 // |
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| 75 | // mode: c++ // |
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| 76 | // compile-command: "make install" // |
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| 77 | // End: // |
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