source: src/ResolvExpr/typeops.h @ 4ae2364

//
// Cforall Version 1.0.0 Copyright (C) 2015 University of Waterloo
//
// The contents of this file are covered under the licence agreement in the
// file "LICENCE" distributed with Cforall.
//
// typeops.h --
//
// Author           : Richard C. Bilson
// Created On       : Sun May 17 07:28:22 2015
// Last Modified By : Peter A. Buhr
// Last Modified On : Fri Feb  8 09:30:34 2019
// Update Count     : 4
//

#pragma once

#include <vector>

#include "Cost.h"
#include "TypeEnvironment.h"
#include "WidenMode.h"
#include "AST/Fwd.hpp"
#include "AST/Node.hpp"
#include "AST/SymbolTable.hpp"
#include "AST/Type.hpp"
#include "AST/TypeEnvironment.hpp"
#include "SynTree/SynTree.h"
#include "SynTree/Type.h"
#include "SymTab/Indexer.h"

namespace ResolvExpr {
        // combos: takes a list of sets and returns a set of lists representing every possible way of forming a list by
        // picking one element out of each set
        template< typename InputIterator, typename OutputIterator >
        void combos( InputIterator begin, InputIterator end, OutputIterator out ) {
                typedef typename InputIterator::value_type SetType;
                typedef typename std::vector< typename SetType::value_type > ListType;

                if ( begin == end )     {
                        *out++ = ListType();
                        return;
                } // if

                InputIterator current = begin;
                begin++;

                std::vector< ListType > recursiveResult;
                combos( begin, end, back_inserter( recursiveResult ) );

                for ( const auto& i : recursiveResult ) for ( const auto& j : *current ) {
                        ListType result;
                        std::back_insert_iterator< ListType > inserter = back_inserter( result );
                        *inserter++ = j;
                        std::copy( i.begin(), i.end(), inserter );
                        *out++ = result;
                }
        }

        // in AdjustExprType.cc
        /// Replaces array types with the equivalent pointer, and function types with a pointer-to-function
        void adjustExprType( Type *&type, const TypeEnvironment &env, const SymTab::Indexer &indexer );

        /// Replaces array types with the equivalent pointer, and function types with a pointer-to-function using empty TypeEnvironment and Indexer
        void adjustExprType( Type *& type );

        template< typename ForwardIterator >
        void adjustExprTypeList( ForwardIterator begin, ForwardIterator end, const TypeEnvironment &env, const SymTab::Indexer &indexer ) {
                while ( begin != end ) {
                        adjustExprType( *begin++, env, indexer );
                } // while
        }

        // in CastCost.cc
        Cost castCost( Type *src, Type *dest, const SymTab::Indexer &indexer, const TypeEnvironment &env );

        // in ConversionCost.cc
        Cost conversionCost( Type *src, Type *dest, const SymTab::Indexer &indexer, const TypeEnvironment &env );

        // in AlternativeFinder.cc
        Cost computeConversionCost( Type *actualType, Type *formalType, 
                const SymTab::Indexer &indexer, const TypeEnvironment &env );

        // in PtrsAssignable.cc
        int ptrsAssignable( Type *src, Type *dest, const TypeEnvironment &env );

        // in PtrsCastable.cc
        int ptrsCastable( Type *src, Type *dest, const TypeEnvironment &env, const SymTab::Indexer &indexer );

        // in Unify.cc
        bool isFtype( Type *type );
        bool typesCompatible( Type *, Type *, const SymTab::Indexer &indexer, const TypeEnvironment &env );
        bool typesCompatibleIgnoreQualifiers( Type *, Type *, const SymTab::Indexer &indexer, const TypeEnvironment &env );

        inline bool typesCompatible( Type *t1, Type *t2, const SymTab::Indexer &indexer ) {
                TypeEnvironment env;
                return typesCompatible( t1, t2, indexer, env );
        }

        inline bool typesCompatibleIgnoreQualifiers( Type *t1, Type *t2, const SymTab::Indexer &indexer ) {
                TypeEnvironment env;
                return typesCompatibleIgnoreQualifiers( t1, t2, indexer, env );
        }

        bool typesCompatible( 
                const ast::Type *, const ast::Type *, const ast::SymbolTable &, 
                const ast::TypeEnvironment & env = {} );
        
        bool typesCompatibleIgnoreQualifiers(
                const ast::Type *, const ast::Type *, const ast::SymbolTable &, 
                const ast::TypeEnvironment & env = {} );

        /// creates the type represented by the list of returnVals in a FunctionType. The caller owns the return value.
        Type * extractResultType( FunctionType * functionType );
        /// Creates or extracts the type represented by the list of returns in a `FunctionType`.
        ast::ptr<ast::Type> extractResultType( const ast::FunctionType * func );

        // in CommonType.cc
        Type * commonType( Type *type1, Type *type2, bool widenFirst, bool widenSecond, const SymTab::Indexer &indexer, TypeEnvironment &env, const OpenVarSet &openVars );
        const ast::Type * commonType(
                const ast::Type * type1, const ast::Type * type2, WidenMode widen, 
                const ast::SymbolTable & symtab, ast::TypeEnvironment & env, const ast::OpenVarSet & open );

        // in PolyCost.cc
        int polyCost( Type *type, const TypeEnvironment &env, const SymTab::Indexer &indexer );

        // in SpecCost.cc
        int specCost( Type *type );

        // in Occurs.cc
        bool occurs( Type *type, std::string varName, const TypeEnvironment &env );
        // new AST version in TypeEnvironment.cpp (only place it was used in old AST)

        template<typename Iter> 
        bool occursIn( Type* ty, Iter begin, Iter end, const TypeEnvironment &env ) {
                while ( begin != end ) {
                        if ( occurs( ty, *begin, env ) ) return true;
                        ++begin;
                }
                return false;
        }

        // in AlternativeFinder.cc
        void referenceToRvalueConversion( Expression *& expr, Cost & cost );
        const ast::Expr * referenceToRvalueConversion( const ast::Expr * expr, Cost & cost );

        /// flatten tuple type into list of types
        template< typename OutputIterator >
        void flatten( Type * type, OutputIterator out ) {
                if ( TupleType * tupleType = dynamic_cast< TupleType * >( type ) ) {
                        for ( Type * t : tupleType->get_types() ) {
                                flatten( t, out );
                        }
                } else {
                        *out++ = type->clone();
                }
        }

        /// flatten tuple type into existing list of types
        static inline void flatten( 
                const ast::Type * type, std::vector< ast::ptr< ast::Type > > & out 
        ) {
                if ( auto tupleType = dynamic_cast< const ast::TupleType * >( type ) ) {        
                        for ( const ast::Type * t : tupleType->types ) {
                                flatten( t, out );
                        }
                } else {
                        out.emplace_back( type );
                }
        }

        /// flatten tuple type into list of types
        static inline std::vector< ast::ptr< ast::Type > > flatten( const ast::Type * type ) {
                std::vector< ast::ptr< ast::Type > > out;
                out.reserve( type->size() );
                flatten( type, out );
                return out;
        }
} // namespace ResolvExpr

// Local Variables: //
// tab-width: 4 //
// mode: c++ //
// compile-command: "make install" //
// End: //