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/*
Copyright 2007 David Nolden <david.nolden.kdevelop@art-master.de>
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 OVERLOADRESOLUTIONHELPER_H
#define OVERLOADRESOLUTIONHELPER_H
#include "cppduchainexport.h"
#include <QPair>
#include <QList>
#include "overloadresolution.h"
#include "viablefunctions.h"
#include <language/duchain/identifier.h>
namespace Cpp
{
class ViableFunction;
class KDEVCPPDUCHAIN_EXPORT OverloadResolutionFunction {
public:
OverloadResolutionFunction();
OverloadResolutionFunction( int _matchedArguments, const ViableFunction& _viable );
/**The count of arguments that are already matched in this OverloadResolutionFunction. The argument of the OverloadResolutionFunction at this offset is the next one to be matched.
*This is variable, and needed so global binary overloaded operators and member binary
*operators can be treated same(global operators take 2 arguments, local
*operators only 1)
* */
int matchedArguments;
///Result of matching the OverloadResolutionFunction to available arguments. Also contains the declaration.
ViableFunction function;
};
/**
* Helps searching and revolving functions or operator-functions in a unified way, partially or completely.
* The du-chain must be locked for the whole lifetime of this object.
* */
class KDEVCPPDUCHAIN_EXPORT OverloadResolutionHelper {
public:
typedef QPair<OverloadResolver::ParameterList, KDevelop::Declaration*> DeclarationWithArgument;
OverloadResolutionHelper(const KDevelop::DUContextPointer& context, const KDevelop::TopDUContextPointer& topContext);
/**
* @param identifierForADL The identifier will be used for performing argument-dependent look-up.
* This should only be non-empty if the function is not being called as a member.
* */
void setFunctionNameForADL( const KDevelop::QualifiedIdentifier& identifierForADL );
/**
* @param base Sets the base-type, which is used while searching overloaded operators as:
* Container-class of member operators, or first argument of global operators.
* @warning: If calling this, you _must_ also call setFunctionNameForADL with the full operator name,
* like "operator=".
* */
void setOperator( const OverloadResolver::Parameter& base );
/**
* Call this instead of setOperator to use the specified list of functions for overload-resolution
* */
void setFunctions( const QList<KDevelop::Declaration*>& functions );
/**
* Call this to set the already known parameter-types for the function-call,
* or for the operator-call.(For operators, this should not include the base-type)
* */
void setKnownParameters( const OverloadResolver::ParameterList& parameters );
/**
* Call this to set the whether we are looking for a const or a non-const method.
* By default, the constness is not taken into account.
*/
void setConstness(OverloadResolver::Constness constness);
/**
* @param partial If partial is given, it is not required that all parameters of the functions have a value.
*
* This is relatively slow, and returns a list of all considered functions, sorted by viability.
*
* The du-chain must be read-locked.
* */
QList<OverloadResolutionFunction> resolveToList( bool partial = false );
/**
* The du-chain must be read-locked.
*
* Returns only the most viable matched function. If no function is viable, a nonviable
* function will be returned.
*
* NOTE: you *must* call @c setFunctions before, if not looking for operators!
*
* @param forceIsInstance If this is true, all encountered class types will be considered _instances_
* of the class.
* */
ViableFunction resolve( bool forceIsInstance = false );
private:
void initializeResolver(OverloadResolver& resolver);
void log(const QString& str) const;
KDevelop::DUContextPointer m_context;
KDevelop::TopDUContextPointer m_topContext;
OverloadResolver::Parameter m_baseType;
bool m_isOperator;
QList< DeclarationWithArgument > m_declarations; //Declarations are paired with the optional first argument for the declared functions
OverloadResolver::ParameterList m_knownParameters;
QMap<KDevelop::Declaration*, int> m_argumentCountMap; //Maps how many pre-defined arguments were given to which function
QualifiedIdentifier m_identifierForADL;
OverloadResolver::Constness m_constness;
};
}
#endif
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