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Diffstat (limited to 'src/xmlpatterns/expr/quserfunctioncallsite_p.h')
| -rw-r--r-- | src/xmlpatterns/expr/quserfunctioncallsite_p.h | 182 |
1 files changed, 182 insertions, 0 deletions
diff --git a/src/xmlpatterns/expr/quserfunctioncallsite_p.h b/src/xmlpatterns/expr/quserfunctioncallsite_p.h new file mode 100644 index 0000000..50ae8f4 --- /dev/null +++ b/src/xmlpatterns/expr/quserfunctioncallsite_p.h @@ -0,0 +1,182 @@ +/**************************************************************************** +** +** 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. +** $QT_END_LICENSE$ +** +****************************************************************************/ + +// +// W A R N I N G +// ------------- +// +// This file is not part of the Qt API. It exists purely as an +// implementation detail. This header file may change from version to +// version without notice, or even be removed. +// +// We mean it. + +#ifndef Patternist_UserFunctionCallsite_H +#define Patternist_UserFunctionCallsite_H + +#include "qcallsite_p.h" +#include "qfunctionsignature_p.h" +#include "qunlimitedcontainer_p.h" +#include "quserfunction_p.h" +#include "qvariabledeclaration_p.h" + +QT_BEGIN_HEADER +QT_BEGIN_NAMESPACE + +namespace QPatternist +{ + /** + * @short Performs a call to a UserFunction. + * + * UserFunctionCallsite is the call site to a function that has been + * declared in the query using <tt>declare function</tt>. That is, it is + * never used for builtin functions such as <tt>fn:count()</tt>. + * + * @see UserFunction + * @see ArgumentReference + * @author Frans Englich <fenglich@trolltech.com> + * @ingroup Patternist_expressions + */ + class UserFunctionCallsite : public CallSite + { + public: + typedef QExplicitlySharedDataPointer<UserFunctionCallsite> Ptr; + typedef QList<UserFunctionCallsite::Ptr> List; + + UserFunctionCallsite(const QXmlName name, + const FunctionSignature::Arity arity); + + virtual bool evaluateEBV(const DynamicContext::Ptr &context) const; + virtual Item::Iterator::Ptr evaluateSequence(const DynamicContext::Ptr &context) const; + virtual Item evaluateSingleton(const DynamicContext::Ptr &context) const; + virtual void evaluateToSequenceReceiver(const DynamicContext::Ptr &context) const; + + virtual Expression::Ptr typeCheck(const StaticContext::Ptr &context, + const SequenceType::Ptr &reqType); + + /** + * We call compress on our body. + */ + virtual Expression::Ptr compress(const StaticContext::Ptr &context); + + virtual Expression::Properties properties() const; + + /** + * @short Returns the types declared in the function declaration. + * + * @see CallTemplate::expectedOperandTypes() + */ + virtual SequenceType::List expectedOperandTypes() const; + + virtual SequenceType::Ptr staticType() const; + virtual ExpressionVisitorResult::Ptr accept(const ExpressionVisitor::Ptr &visitor) const; + + /** + * @returns always IDUserFunctionCallsite. + */ + virtual ID id() const; + + /** + * If @p slotOffset is -1, it means this function has no arguments. + */ + void setSource(const UserFunction::Ptr &userFunction, + const VariableSlotID cacheSlotOffset); + + /** + * @returns @c true, if a function definition with signature @p sign + * would be valid to call from this callsite, otherwise @c false. + */ + bool isSignatureValid(const FunctionSignature::Ptr &sign) const; + + FunctionSignature::Arity arity() const; + + inline Expression::Ptr body() const + { + return m_body; + } + + virtual bool configureRecursion(const CallTargetDescription::Ptr &sign); + virtual CallTargetDescription::Ptr callTargetDescription() const; + + private: + /** + * Creates a new context sets the arguments, and returns it. + */ + DynamicContext::Ptr bindVariables(const DynamicContext::Ptr &context) const; + + const FunctionSignature::Arity m_arity; + /** + * The reason this variable, as well as others, aren't const, is that + * the binding to the actual function, is resolved after this + * UserFunctionCallsite has been created. + */ + VariableSlotID m_expressionSlotOffset; + + /** + * @note This may be different from m_functionDeclaration->body(). It + * may differ on a per-callsite basis. + */ + Expression::Ptr m_body; + UserFunction::Ptr m_functionDeclaration; + }; + + /** + * @short Formats UserFunctionCallsite. + * + * @relates UserFunctionCallsite + */ + static inline QString formatFunction(const UserFunctionCallsite::Ptr &func) + { + Q_UNUSED(func); + // TODO TODO TODO + // TODO Make UserFunctionCallsite always use a FunctionSignature + return QLatin1String("<span class='XQuery-function'>") + + QString() + + //escape(func->name()->toString()) + + QLatin1String("</span>"); + } +} + +QT_END_NAMESPACE + +QT_END_HEADER + +#endif |