/**************************************************************************** | |
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** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). | |
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** This file is part of the QtXmlPatterns module of the Qt Toolkit. | |
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** GNU General Public License Usage | |
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** file. Please review the following information to ensure the GNU General | |
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****************************************************************************/ | |
#include "qcontextitem_p.h" | |
#include "qcommonsequencetypes_p.h" | |
#include "qemptysequence_p.h" | |
#include "qfunctionsignature_p.h" | |
#include "qgenericsequencetype_p.h" | |
#include "qcollationchecker_p.h" | |
#include "qcommonnamespaces_p.h" | |
#include "qfunctioncall_p.h" | |
QT_BEGIN_NAMESPACE | |
using namespace QPatternist; | |
SequenceType::List FunctionCall::expectedOperandTypes() const | |
{ | |
const FunctionArgument::List args(signature()->arguments()); | |
FunctionArgument::List::const_iterator it(args.constBegin()); | |
const FunctionArgument::List::const_iterator end(args.constEnd()); | |
// TODO reserve/resize() | |
SequenceType::List result; | |
for(; it != end; ++it) | |
result.append((*it)->type()); | |
return result; | |
} | |
Expression::Ptr FunctionCall::typeCheck(const StaticContext::Ptr &context, | |
const SequenceType::Ptr &reqType) | |
{ | |
/* We don't cache properties() at some stages because it can be invalidated | |
* by the typeCheck(). */ | |
const FunctionSignature::Arity maxArgs = signature()->maximumArguments(); | |
/* We do this before the typeCheck() such that the appropriate conversions | |
* are applied to the ContextItem. */ | |
if(m_operands.count() < maxArgs && | |
has(UseContextItem)) | |
{ | |
m_operands.append(Expression::Ptr(new ContextItem())); | |
context->wrapExpressionWith(this, m_operands.last()); | |
} | |
const Expression::Ptr me(UnlimitedContainer::typeCheck(context, reqType)); | |
if(me != this) | |
return me; | |
const Properties props(properties()); | |
if(props.testFlag(RewriteToEmptyOnEmpty) && | |
*CommonSequenceTypes::Empty == *m_operands.first()->staticType()->itemType()) | |
{ | |
return EmptySequence::create(this, context); | |
} | |
if(props.testFlag(LastOperandIsCollation) && | |
m_operands.count() == maxArgs) | |
{ | |
m_operands.last() = Expression::Ptr(new CollationChecker(m_operands.last())); | |
context->wrapExpressionWith(this, m_operands.last()); | |
} | |
return me; | |
} | |
void FunctionCall::setSignature(const FunctionSignature::Ptr &sign) | |
{ | |
m_signature = sign; | |
} | |
FunctionSignature::Ptr FunctionCall::signature() const | |
{ | |
Q_ASSERT(m_signature); /* It really should be set. */ | |
return m_signature; | |
} | |
SequenceType::Ptr FunctionCall::staticType() const | |
{ | |
Q_ASSERT(m_signature); | |
if(has(EmptynessFollowsChild)) | |
{ | |
if(m_operands.isEmpty()) | |
{ | |
/* This is a function which uses the context item when having no arguments. */ | |
return signature()->returnType(); | |
} | |
const Cardinality card(m_operands.first()->staticType()->cardinality()); | |
if(card.allowsEmpty()) | |
return signature()->returnType(); | |
else | |
{ | |
/* Remove empty. */ | |
return makeGenericSequenceType(signature()->returnType()->itemType(), | |
card & Cardinality::oneOrMore()); | |
} | |
} | |
return signature()->returnType(); | |
} | |
Expression::Properties FunctionCall::properties() const | |
{ | |
Q_ASSERT(m_signature); | |
return signature()->properties(); | |
} | |
ExpressionVisitorResult::Ptr FunctionCall::accept(const ExpressionVisitor::Ptr &visitor) const | |
{ | |
return visitor->visit(this); | |
} | |
Expression::ID FunctionCall::id() const | |
{ | |
Q_ASSERT(m_signature); | |
return m_signature->id(); | |
} | |
QT_END_NAMESPACE |