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Diffstat (limited to 'src/xmlpatterns/functions/qfunctioncall.cpp')
| -rw-r--r-- | src/xmlpatterns/functions/qfunctioncall.cpp | 160 |
1 files changed, 160 insertions, 0 deletions
diff --git a/src/xmlpatterns/functions/qfunctioncall.cpp b/src/xmlpatterns/functions/qfunctioncall.cpp new file mode 100644 index 0000000000..edea72f624 --- /dev/null +++ b/src/xmlpatterns/functions/qfunctioncall.cpp @@ -0,0 +1,160 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** Contact: Qt Software Information (qt-info@nokia.com) +** +** This file is part of the QtXmlPatterns module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the either Technology Preview License Agreement or the +** Beta Release License Agreement. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 2.1 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 2.1 requirements +** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Nokia gives you certain +** additional rights. These rights are described in the Nokia Qt LGPL +** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this +** package. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 3.0 as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU General Public License version 3.0 requirements will be +** met: http://www.gnu.org/copyleft/gpl.html. +** +** If you are unsure which license is appropriate for your use, please +** contact the sales department at qt-sales@nokia.com. +** $QT_END_LICENSE$ +** +****************************************************************************/ + + +#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 |