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/***************************************************************************
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begin : Sat Jul 21 2001
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copyright : (C) 2001 by Victor R<>er
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email : victor_roeder@gmx.de
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copyright : (C) 2002,2003 by Roberto Raggi
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email : roberto@kdevelop.org
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copyright : (C) 2005 by Adam Treat
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email : manyoso@yahoo.com
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copyright : (C) 2006 by David Nolden
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email : david.nolden.kdevelop@art-master.de
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***************************************************************************/
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/***************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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***************************************************************************/
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#include "cppevaluation.h"
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#include "simplecontext.h"
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#include "safetycounter.h"
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extern SafetyCounter safetyCounter;
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namespace CppEvaluation {
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void statusLog( const QString& str ) {
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ifVerboseMajor( dbgMajor() << str << endl );
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statusBarText( str, 2000 );
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}
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OperatorSet AllOperators;
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///These lines register the operators to the list of all operators
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RegisterOperator< DotOperator > DotReg( AllOperators );
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RegisterOperator< NestedTypeOperator > NestedReg( AllOperators );
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RegisterOperator< ArrowOperator > ArrowReg( AllOperators );
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RegisterOperator< StarOperator > StarReg( AllOperators );
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RegisterOperator< AddressOperator > AddressReg( AllOperators );
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RegisterOperator< IndexOperator > IndexReg( AllOperators );
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RegisterOperator< ParenOperator > ParenReg( AllOperators );
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template<class To, class From>
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QValueList<To> convertList( const QValueList<From>& from ) {
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QValueList<To> ret;
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for( typename QValueList<From>::const_iterator it = from.begin(); it != from.end(); ++it ) {
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ret << (To)*it;
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}
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return ret;
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}
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QString nameFromType( SimpleType t ) {
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return t->fullTypeResolved();
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}
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QString Operator::printTypeList( QValueList<EvaluationResult>& lst )
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{
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QString ret;
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for( QValueList<EvaluationResult>::iterator it = lst.begin(); it != lst.end(); ++it ) {
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ret += "\"" + (*it)->fullNameChain() + "\", ";
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}
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ret.truncate( ret.length() - 3 );
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return ret;
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}
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void Operator::log( const QString& msg ) {
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statusLog( "\"" + name() + "\": " + msg );
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//ifVerboseMajor( dbgMajor() << "\"" << name() << "\": " << msg << endl );
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}
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OperatorSet::~OperatorSet() {
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for( QValueList< Operator* >::iterator it = m_operators.begin(); it != m_operators.end(); ++it ) {
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delete *it;
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}
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}
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OperatorIdentification OperatorSet::identifyOperator( const QString& str_ , Operator::BindingSide allowedBindings) {
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QString str = str_.stripWhiteSpace();
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for( OperatorList::iterator it = m_operators.begin(); it != m_operators.end(); ++it ) {
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if( ((*it)->binding() & allowedBindings) == (*it)->binding() ) {
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if( OperatorIdentification ident = (*it)->identify( str ) ) {
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return ident;
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}
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}
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}
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return OperatorIdentification();
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}
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OperatorIdentification UnaryOperator::identify( QString& str ) {
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OperatorIdentification ret;
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if( str.startsWith( m_identString ) ) {
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ret.start = 0;
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ret.end = m_identString.length();
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ret.found = true;
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ret.op = this;
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}
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return ret;
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}
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EvaluationResult UnaryOperator::apply( QValueList<EvaluationResult> params, QValueList<EvaluationResult> innerParams ) {
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if( !checkParams( params ) ) {
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log( QString("parameter-check failed: %1 params: ").arg( params.size() ) + printTypeList( params ) );
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return EvaluationResult();
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} else {
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EvaluationResult t = unaryApply( params.front(), innerParams );
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if( !t ) {
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if( params.front() )
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log( "could not apply \"" + name() + "\" to \"" + nameFromType( params.front() ) + "\"");
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else
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log( "operator \"" + name() + "\" applied on \"" + nameFromType( params.front() ) + "\": returning unresolved type \"" + nameFromType( t ) + "\"");
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}
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return t;
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}
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}
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EvaluationResult NestedTypeOperator::unaryApply( EvaluationResult param, const QValueList<EvaluationResult>& /*innerParams*/ ) {
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return param;
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}
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EvaluationResult DotOperator::unaryApply( EvaluationResult param, const QValueList<EvaluationResult>& /*innerParams*/ ) {
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if( param->totalPointerDepth() == 0 ) {
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return param;
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} else {
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log( "failed to apply dot-operator to " + param->fullNameChain() + " because the pointer-depth is wrong" );
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return EvaluationResult();
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}
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}
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EvaluationResult ArrowOperator::unaryApply( EvaluationResult param, const QValueList<EvaluationResult>& innerParams ) {
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if( param->totalPointerDepth() == 1 ) {
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param->setTotalPointerDepth( param->totalPointerDepth() - 1 );
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return param;
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} else {
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if( param->resolved() ) {
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if( param->totalPointerDepth() == 0 ) {
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return param->resolved()->applyOperator( SimpleTypeImpl::ArrowOp , convertList<LocateResult, EvaluationResult>(innerParams) );
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} else {
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log("failed to apply arrow-operator to " + param->fullNameChain() + " because the pointer-depth is wrong" );
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return EvaluationResult();
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}
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} else {
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log( "failed to apply arrow-operator to unresolved type" );
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return EvaluationResult();
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}
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};
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}
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EvaluationResult StarOperator::unaryApply( EvaluationResult param, const QValueList<EvaluationResult>& /*innerParams*/ ) {
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if( param->totalPointerDepth() > 0 ) {
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param->setTotalPointerDepth( param->totalPointerDepth() - 1 );
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return param;
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} else {
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if( param->resolved() ) {
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return param->resolved()->applyOperator( SimpleTypeImpl::StarOp );
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} else {
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log( "failed to apply star-operator to unresolved type" );
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return EvaluationResult();
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}
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};
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}
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EvaluationResult AddressOperator::unaryApply( EvaluationResult param, const QValueList<EvaluationResult>& /*innerParams*/ ) {
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param->setTotalPointerDepth( param->totalPointerDepth() + 1 );
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return param;
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}
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OperatorIdentification UnaryParenOperator::identify( QString& str ) {
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OperatorIdentification ret;
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if( str.startsWith( QString( identString()[0] ) ) ) {
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ret.start = 0;
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ret.end = findClose( str, 0 );
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if( ret.end == -1 ) {
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ret.found = false;
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ret.end = 0;
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} else {
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if( str[ret.end] == identString()[1] ) {
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ret.found = true;
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ret.end += 1;
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ret.op = this;
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///Try to extract the parameter-strings.
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ParamIterator it( identString(), str.mid( ret.start, ret.end - ret.start ) );
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while( it ) {
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ret.innerParams << (*it).stripWhiteSpace();
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++it;
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}
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} else {
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ret.end = 0;
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}
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}
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}
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return ret;
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}
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EvaluationResult IndexOperator::unaryApply( EvaluationResult param, const QValueList<EvaluationResult>& innerParams ) {
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if( param->totalPointerDepth() > 0 ) {
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param->setTotalPointerDepth( param->totalPointerDepth() - 1 );
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return param;
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} else {
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if( param->resolved() ) {
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return param->resolved()->applyOperator( SimpleTypeImpl::IndexOp, convertList<LocateResult>( innerParams ) );
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} else {
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log( "failed to apply index-operator to unresolved type" );
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return EvaluationResult();
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}
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};
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}
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EvaluationResult ParenOperator::unaryApply( EvaluationResult param, const QValueList<EvaluationResult>& innerParams ) {
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if( param ) {
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if( param->resolved() ) {
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return param->resolved()->applyOperator( SimpleTypeImpl::ParenOp, convertList<LocateResult>(innerParams) );
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} else {
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log( "failed to apply paren-operator to unresolved type" );
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return EvaluationResult();
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}
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} else {
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return innerParams[0];
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}
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}
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ExpressionEvaluation::ExpressionEvaluation( CppCodeCompletion* data, ExpressionInfo expr, OperatorSet& operators, const HashedStringSet& includeFiles, SimpleContext* ctx ) : m_data( data ), m_ctx( ctx ), m_expr( expr ), m_global(false), m_operators( operators ), m_includeFiles( includeFiles ) {
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safetyCounter.init();
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ifVerboseMajor( dbgMajor( ) << "Initializing evaluation of expression " << expr << endl );
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if ( expr.expr().startsWith( "::" ) )
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{
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expr.setExpr( expr.expr().mid( 2 ) );
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m_global = true;
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}
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//m_expr = m_data->splitExpression( expr.expr() ).join("");
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}
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EvaluationResult ExpressionEvaluation::evaluate() {
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EvaluationResult res;
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res = evaluateExpressionInternal( m_expr.expr(), m_ctx->global(), m_ctx, m_ctx, /*m_expr.canBeTypeExpression() cannot be safely determined*/true );
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ExpressionInfo ex = res.expr; ///backup and set the type which was chosen while the evaluation-process
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res.expr = m_expr;
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res.expr.t = ex.t;
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return res;
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}
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EvaluationResult ExpressionEvaluation::evaluateExpressionInternal( QString expr, EvaluationResult scope, SimpleContext * ctx, SimpleContext* innerCtx , bool canBeTypeExpression) {
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LogDebug d( "#evl#" );
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if( expr.isEmpty() || !safetyCounter ) {
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scope.expr.t = ExpressionInfo::NormalExpression;
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return scope;
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}
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/*if( !scope->resolved() ) {
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ifVerboseMajor( dbgMajor() << "evaluateExpressionInternal(\"" << expr << "\") scope: \"" << scope->fullTypeStructure() << "\" is unresolved " << endl );
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return EvaluationResult();
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}*/
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ifVerboseMajor( dbgMajor() << "evaluateExpressionInternal(\"" << expr << "\") scope: \"" << scope->fullNameChain() << "\" context: " << ctx << endl );
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expr = expr.stripWhiteSpace();
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///Find the rightmost operator with the lowest priority, for the first split.
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QValueList<OperatorIdentification> idents;
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for( uint a = 0; a < expr.length(); ++a ) {
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QString part = expr.mid( a );
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OperatorIdentification ident = m_operators.identifyOperator( part );
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if( ident ) {
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ifVerboseMajor( dbgMajor() << "identified \"" << ident.op->name() << "\" in string " << part << endl );
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ident.start += a;
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ident.end += a;
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idents << ident;
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a += ident.end;
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} else {
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if( isLeftParen( part[0] ) ) {
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int jump = findClose( part, 0 );
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if( jump != -1 )
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a += jump;
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}
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}
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}
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if( !idents.isEmpty() ) {
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OperatorIdentification lowest;
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for( QValueList<OperatorIdentification>::iterator it = idents.begin(); it != idents.end(); ++it ) {
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if( lowest ) {
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if( lowest.op->priority() >= (*it).op->priority() )
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lowest = *it;
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} else {
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lowest = *it;
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}
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}
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if( lowest ) {
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QString leftSide = expr.left( lowest.start ).stripWhiteSpace();
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QString rightSide = expr.right( expr.length() - lowest.end ).stripWhiteSpace();
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EvaluationResult left, right;
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if( !leftSide.isEmpty() ) {
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left = evaluateExpressionInternal( leftSide, scope, ctx, innerCtx, lowest.op->canBeType( Operator::Left ) );
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} else {
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left = scope;
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}
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if( !left && (lowest.op->binding() & Operator::Left) ) {
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ifVerboseMajor( dbgMajor() << "problem while evaluating expression \"" << expr << "\", the operator \"" << lowest.op->name() << "\" has a binding to the left side, but no left side could be evaluated: \"" << leftSide << "\"" << endl );
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}
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if( !rightSide.isEmpty() && (lowest.op->binding() & Operator::Right) )
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right = evaluateExpressionInternal( rightSide, SimpleType(), ctx, innerCtx, lowest.op->canBeType( Operator::Right ) );
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if( !right && (lowest.op->binding() & Operator::Right) ) {
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ifVerboseMajor( dbgMajor() << "problem while evaluating expression \"" << expr << "\", the operator \"" << lowest.op->name() << "\" has a binding to the right side, but no right side could be evaluated: \"" << rightSide << "\"" << endl );
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}
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QValueList<EvaluationResult> innerParams;
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QValueList<EvaluationResult> params;
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if( lowest.op->binding() & Operator::Left ) params << left;
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if( lowest.op->binding() & Operator::Right ) params << right;
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for( QValueList<QString>::iterator it = lowest.innerParams.begin(); it != lowest.innerParams.end(); ++it ) {
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ifVerboseMajor(dbgMajor() << "evaluating inner parameter \"" + *it + "\"" );
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innerParams << evaluateExpressionInternal( (*it), SimpleType(), innerCtx, innerCtx, lowest.op->canBeType( Operator::Neutral ) );
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}
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EvaluationResult applied = lowest.op->apply( params, innerParams );
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if( !applied ) {
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statusLog( "\"" + expr + "\": failed to apply the operator \"" + lowest.op->name() + "\"" );
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}
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if( ! (lowest.op->binding() & Operator::Left) && !leftSide.isEmpty() ) {
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///When the operator has no binding to the left, the left side should be empty.
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statusLog( "\"" + expr + "\": problem with the operator \"" + lowest.op->name() + ", it has no binding to the left side, but the left side is \""+ leftSide + "\"" );
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}
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if( ! (lowest.op->binding() & Operator::Right) && !rightSide.isEmpty() ) {
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///When the operator has no binding to the right, we should continue evaluating the right side, using the left type as scope.
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///Think about this.
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return evaluateExpressionInternal( rightSide, applied, 0, innerCtx, lowest.op->canBeType( Operator::Right ) );
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}
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return applied;
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} else {
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ifVerboseMajor( dbgMajor() << " could not find an operator in " << expr << endl );
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return evaluateAtomicExpression( expr, scope, ctx );
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}
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}
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//dbgMajor() << " could not evaluate " << expr << endl;
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ifVerboseMajor( dbgMajor() << "evaluating \"" << expr << "\" as atomic expression" << endl );
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TypeDesc exp = m_ctx->container()->resolveTemplateParams( TypeDesc(expr) );
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ifVerboseMajor( dbgMajor() << "after template-parameter resolution: \"" << exp.fullNameChain() << "\"" << endl );
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EvaluationResult res = evaluateAtomicExpression( exp, scope, ctx, canBeTypeExpression );
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return res;
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}
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/**This function needs a clean workover.
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* An atomic expression is one that only consists of a type-, function- or variable-name(may include '::')
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*/
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EvaluationResult ExpressionEvaluation::evaluateAtomicExpression( TypeDesc expr, EvaluationResult scope, SimpleContext * ctx, bool canBeTypeExpression ) {
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LogDebug d( "#evt#");
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if( !safetyCounter || !d ) return SimpleType();
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bool canBeItemExpression = true; ///To be implemented
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if( scope ) {
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expr.setIncludeFiles( scope.resultType->includeFiles() );
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} else {
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expr.setIncludeFiles( m_includeFiles );
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}
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ifVerboseMajor( dbgMajor() << "evaluateAtomicExpression(\"" << expr.name() << "\") scope: \"" << scope->fullNameChain() << "\" context: " << ctx << endl );
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EvaluationResult bestRet;
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int bestDepth = 0;
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if( expr.name().isEmpty() )
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return scope;
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TypePointer searchIn = scope->resolved();
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if( !searchIn ) {
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statusLog( "scope-type is not resolved" );
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return EvaluationResult();
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}
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if( ctx )
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searchIn = ctx->container().get();
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if( ctx && canBeItemExpression ) {
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///Search for variables and functions, first in the current context, and then through the container-classes upwards.
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// find the variable in the current context
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SimpleVariable var = ctx->findVariable( expr.name() );
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if ( var.type ) {
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TypeDesc d( var.type );
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d.setIncludeFiles( m_includeFiles );
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EvaluationResult ret = EvaluationResult( ctx->container()->locateDecType( d ), var.toDeclarationInfo( "current_file" ));
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ret.expr.t = ExpressionInfo::NormalExpression;
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return ret;
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}
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SimpleType current = ctx->container();
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SimpleTypeImpl::TypeOfResult type;
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SafetyCounter s( 20 );
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bool ready = false;
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int depth = 0;
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while( !ready && s )
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{
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if( !current ) ready = true;
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type = current->typeOf( expr );
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if ( type) {
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bestRet = EvaluationResult( type.type, type.decl );
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bestDepth = depth;
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bestRet.expr = expr.fullNameChain();
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bestRet.expr.t = ExpressionInfo::NormalExpression;
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}
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depth++;
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if( !ready ) current = current->parent();
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}
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}
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/*
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if( scope.expr.t & ExpressionInfo::TypeExpression )
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canBeTypeExpression = true;*/
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if( canBeItemExpression && (!bestRet || bestDepth > 0 ) ) {
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//SimpleTypeImpl::
|
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SimpleTypeImpl::TypeOfResult res = searchIn->typeOf( expr );
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if( res ) {
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bestRet = EvaluationResult( res.type, res.decl );
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|
bestDepth = 0;
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|
}
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|
}
|
|
|
if( canBeTypeExpression ) {
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|
///Search for Types
|
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|
LocateResult type = searchIn->locateDecType( expr );
|
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|
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|
|
if( !bestRet ||
|
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|
/** Did we find a constructor within a class? */
|
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(type->resolved() && ( bestRet->resolved() && type->resolved()->desc() == bestRet->resolved()->parent()->desc() && bestRet->resolved()->asFunction() ) ) ) {
|
|
|
/*if ( type && type->resolved() )
|
|
|
{*/
|
|
|
EvaluationResult ret = type;
|
|
|
ret.expr = expr.fullNameChain();
|
|
|
ret.expr.t = ExpressionInfo::TypeExpression;
|
|
|
bestRet = ret;
|
|
|
}
|
|
|
/*} else {
|
|
|
bestRet = EvaluationResult( type );
|
|
|
QStringList s = split+exprList;
|
|
|
s.pop_front();
|
|
|
if( !s.isEmpty() )
|
|
|
bestRet->append( new TypeDescShared( s.join("::") ) );
|
|
|
}*/
|
|
|
}
|
|
|
|
|
|
if( bestRet )
|
|
|
return bestRet;
|
|
|
|
|
|
ifVerboseMajor( dbgMajor() << "evaluateAtomicExpression: \"" << scope.resultType->fullNameChain() << "\"could not locate " << expr.fullNameChain() << endl );
|
|
|
return bestRet;
|
|
|
}
|
|
|
}
|
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|
// kate: indent-mode csands; tab-width 2;
|
