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/*
Copyright 2012 Olivier de Gaalon <olviier.jg@gmail.com>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License version 2 as published by the Free Software Foundation.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#ifndef TEMPLATERESOLUTION_H
#define TEMPLATERESOLUTION_H
#include "typeconversion.h"
#include "cppduchainexport.h"
#include <language/duchain/identifier.h>
#include <language/duchain/types/delayedtype.h>
#include <language/duchain/types/referencetype.h>
namespace Cpp
{
using namespace KDevelop;
/**
* Models template resolution
* The du-chain must be locked for the whole lifetime of this object.
* */
class KDEVCPPDUCHAIN_EXPORT TemplateResolver {
public:
/**
* @param, the topContext with which to resolve declarations
* */
TemplateResolver( const TopDUContext* topContext );
/**
* Match the @param argumentType against the @param parameterType
* Fills @param instantiatedTypes with the arugment types given to delayed and template type parameters
* @return A score for the match, higher is better. If two argumentTypes score the same for a given parameterType
* then it's ambiguous.
* */
uint matchTemplateParameterTypes( const KDevelop::AbstractType::Ptr& argumentType, const KDevelop::AbstractType::Ptr& parameterType, QMap< KDevelop::IndexedString, KDevelop::AbstractType::Ptr >& instantiatedTypes) const;
private:
struct TemplateMatchType
{
TemplateMatchType():
valid(true), constMatch(false), referenceMatch(false), volatileMatch(false), arrayMatch(false),
templateArgsMatch(false), pointerMatchDepth(0)
{
}
//Whether or not the match is at all valid
bool valid;
//Given a const argument, is the parameter also const?
//A non-const argument against a const parameter is not valid
// !!!A "const type pointer" argument with a "const type pointer" parameter is NOT valid unless the pointerMatchDepth is the same
// !!!Otherwise a "const type pointer" argument will match the closest "type pointer" depth
bool constMatch;
//Given a reference/RValue argument, is the parameter also a reference/RValue?
//A non-reference/RValue argument against a reference/RValue parameter is not valid
bool referenceMatch;
//Given a volatile argument, is the parameter also a volatile?
//A non-volatile argument against a volatile parameter is not valid.
bool volatileMatch;
//Given an array argument, is the parameter also a array?
//A non-array argument against a array parameter is not valid
bool arrayMatch;
//Given a template declaration argument, do it and its arguments match the parameter and its parameters?
bool templateArgsMatch;
//How many of the argument's pointers are matched by the parameter?
//An argument with less pointer depth than the parameter is not valid
uint pointerMatchDepth;
uint toUint()
{
Q_ASSERT(!pointerMatchDepth || !arrayMatch);
if (!valid)
return 0;
return (uint)constMatch + (uint)referenceMatch
+ (uint)arrayMatch + (uint)volatileMatch
+ (uint)templateArgsMatch + pointerMatchDepth + 1;
}
};
bool templateHandleConstIntegralType( const AbstractType::Ptr& argumentType, const AbstractType::Ptr& parameterType, TemplateMatchType& res ) const;
bool templateHandleDelayedType( const AbstractType::Ptr& argumentType, const AbstractType::Ptr& parameterType, QMap< IndexedString, AbstractType::Ptr >& instantiatedTypes, TemplateMatchType& res ) const;
bool templateHandleReferenceType( const AbstractType::Ptr& argumentType, const AbstractType::Ptr& parameterType, QMap< IndexedString, AbstractType::Ptr >& instantiatedTypes, TemplateMatchType& res ) const;
bool templateHandlePointerType( const AbstractType::Ptr& argumentType, const AbstractType::Ptr& parameterType, QMap< IndexedString, AbstractType::Ptr >& instantiatedTypes, TemplateMatchType& res ) const;
bool templateHandleArrayType( const AbstractType::Ptr& argumentType, const AbstractType::Ptr& parameterType, QMap< IndexedString, AbstractType::Ptr >& instantiatedTypes, TemplateMatchType& res ) const;
bool templateHandleIdentifiedType( const AbstractType::Ptr& argumentType, const AbstractType::Ptr& parameterType, QMap< IndexedString, AbstractType::Ptr >& instantiatedTypes, TemplateMatchType& res ) const;
void matchTemplateParameterTypesInternal( const AbstractType::Ptr& argumentType, const AbstractType::Ptr& parameterType, QMap< IndexedString, AbstractType::Ptr >& instantiatedTypes, TemplateMatchType& res ) const;
const TopDUContext *m_topContext;
};
}
#endif //TEMPLATERESOLUTION_H
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