source: src/ResolvExpr/ConversionCost.h@ 0f6a7752

//
// 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.
//
// ConversionCost.h --
//
// Author           : Richard C. Bilson
// Created On       : Sun May 17 09:37:28 2015
// Last Modified By : Andrew Beach
// Last Modified On : Mon Jun 24 10:00:00 2019
// Update Count     : 5
//

#pragma once

#include <functional>         // for function

#include "Cost.h"             // for Cost

#include "AST/Fwd.hpp"
#include "AST/Pass.hpp"       // for WithShortCircuiting
#include "Common/PassVisitor.h"
#include "SynTree/Visitor.h"  // for Visitor
#include "SynTree/SynTree.h"  // for Visitor Nodes

namespace SymTab {
        class Indexer;
}  // namespace SymTab

namespace ResolvExpr {
        class TypeEnvironment;

        typedef std::function<Cost(Type *, Type *, const SymTab::Indexer &, const TypeEnvironment &)> CostFunction;
        struct ConversionCost : public WithShortCircuiting {
          public:
                ConversionCost( Type *dest, const SymTab::Indexer &indexer, const TypeEnvironment &env, CostFunction );

                Cost get_cost() const { return cost; }

                void previsit( BaseSyntaxNode * ) { visit_children = false; }

                void postvisit( VoidType * voidType );
                void postvisit( BasicType * basicType );
                void postvisit( PointerType * pointerType );
                void postvisit( ArrayType * arrayType );
                void postvisit( ReferenceType * refType );
                void postvisit( FunctionType * functionType );
                void postvisit( StructInstType * aggregateUseType );
                void postvisit( UnionInstType * aggregateUseType );
                void postvisit( EnumInstType * aggregateUseType );
                void postvisit( TraitInstType * aggregateUseType );
                void postvisit( TypeInstType * aggregateUseType );
                void postvisit( TupleType * tupleType );
                void postvisit( VarArgsType * varArgsType );
                void postvisit( ZeroType * zeroType );
                void postvisit( OneType * oneType );
          protected:
                Type *dest;
                const SymTab::Indexer &indexer;
                Cost cost;
                const TypeEnvironment &env;
                CostFunction costFunc;
        };

        typedef std::function<int(Type *, Type *, const SymTab::Indexer &, const TypeEnvironment &)> PtrsFunction;
        Cost convertToReferenceCost( Type * src, ReferenceType * dest, const SymTab::Indexer & indexer, const TypeEnvironment & env, PtrsFunction func );

// Some function pointer types, differ in return type.
using CostCalculation = std::function<Cost(const ast::Type *, const ast::Type *,
        const ast::SymbolTable &, const ast::TypeEnvironment &)>;
using NumCostCalculation = std::function<int(const ast::Type *, const ast::Type *,
        const ast::SymbolTable &, const ast::TypeEnvironment &)>;

// TODO: When the old ConversionCost is removed, get ride of the _new suffix.
class ConversionCost_new : public ast::WithShortCircuiting {
        const ast::Type * dst;
        const ast::SymbolTable & symtab;
        const ast::TypeEnvironment & env;
        CostCalculation costCalc;
public:
        Cost cost;

        ConversionCost_new( const ast::Type * dst, const ast::SymbolTable & symtab,
                        const ast::TypeEnvironment & env, CostCalculation costCalc ) :
                dst( dst ), symtab( symtab ), env( env ), costCalc( costCalc ), cost( Cost::infinity )
        {}

        void previsit( const ast::Node * ) { visit_children = false; }

        void postvisit( const ast::VoidType * voidType );
        void postvisit( const ast::BasicType * basicType );
        void postvisit( const ast::PointerType * pointerType );
        void postvisit( const ast::ArrayType * arrayType );
        void postvisit( const ast::ReferenceType * refType );
        void postvisit( const ast::FunctionType * functionType );
        void postvisit( const ast::StructInstType * structInstType );
        void postvisit( const ast::UnionInstType * unionInstType );
        void postvisit( const ast::EnumInstType * enumInstType );
        void postvisit( const ast::TraitInstType * traitInstType );
        void postvisit( const ast::TypeInstType * typeInstType );
        void postvisit( const ast::TupleType * tupleType );
        void postvisit( const ast::VarArgsType * varArgsType );
        void postvisit( const ast::ZeroType * zeroType );
        void postvisit( const ast::OneType * oneType );
};

Cost convertToReferenceCost( const ast::Type * src, const ast::ReferenceType * dest,
        const ast::SymbolTable & indexer, const ast::TypeEnvironment & env, NumCostCalculation func );

} // namespace ResolvExpr

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