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Branched from the monolithic repo, Qt master branch, at commit
896db169ea224deb96c59ce8af800d019de63f12

1 files changed, 213 insertions, 0 deletions

diff --git a/src/xmlpatterns/functions/qfunctionsignature_p.h b/src/xmlpatterns/functions/qfunctionsignature_p.h
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+++ b/src/xmlpatterns/functions/qfunctionsignature_p.h
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+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (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 Technology Preview License Agreement accompanying
+** this package.
+**
+** 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 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@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_FunctionSignature_H
+#define Patternist_FunctionSignature_H
+
+template<typename Key, typename Value> class QHash;
+template<typename T> class QList;
+
+#include <QSharedData>
+
+#include "qcalltargetdescription_p.h"
+#include "qexpression_p.h"
+#include "qfunctionargument_p.h"
+#include "qpatternistlocale_p.h"
+#include "qprimitives_p.h"
+
+QT_BEGIN_HEADER
+
+QT_BEGIN_NAMESPACE
+
+namespace QPatternist
+{
+
+    /**
+     * @short Represents the signature of an XPath function.
+     *
+     * FunctionSignature represents and allows inspection of a function signature,
+     * such as <tt>fn:string-join($arg1 as xs:string*, $arg2 as xs:string) as xs:string</tt>.
+     * No XPath related languages allows polymorphism on the type of the arguments, only the
+     * amount(arity) of the arguments. For example, <tt>fn:string() as xs:string</tt> and
+     * <tt>fn:string($arg as item()?) as xs:string</tt> can happily co-exist, but
+     * <tt>fn:string($arg as item()?) as xs:string</tt> and
+     * <tt>fn:string($arg as xs:anyAtomicType?) as xs:string</tt> would be an error. This
+     * fact is reflected by FunctionSignature that if minimumArguments() and maximumArguments()
+     * are not equal, it means that this FunctionSignature represents several
+     * function signatures.
+     *
+     * @ingroup Patternist_functions
+     * @see <a href="http://www.w3.org/TR/xpath-functions/#func-signatures">XQuery 1.0 and
+     * XPath 2.0 Functions and Operators, 1.4 Function Signatures and Descriptions</a>
+     * @see <a href="http://en.wikipedia.org/wiki/Arity">Wikipedia, the free encyclopedia, Arity</a>
+     * @author Frans Englich <frans.englich@nokia.com>
+     */
+    class Q_AUTOTEST_EXPORT FunctionSignature : public CallTargetDescription
+    {
+    public:
+        enum
+        {
+            /**
+             * Flags the function as allowing an unlimited amount of arguments.
+             */
+            UnlimitedArity = -1
+        };
+
+        typedef QExplicitlySharedDataPointer<FunctionSignature> Ptr;
+        typedef QHash<QXmlName, FunctionSignature::Ptr> Hash;
+        typedef QList<FunctionSignature::Ptr> List;
+
+        /**
+         * A number which tells the amount of arguments a function has.
+         */
+        typedef qint16 Arity;
+
+        FunctionSignature(const QXmlName name,
+                          const Arity minArgs,
+                          const Arity maxArgs,
+                          const SequenceType::Ptr &returnType,
+                          const Expression::Properties chars = Expression::Properties(),
+                          const Expression::ID id = Expression::IDIgnorableExpression);
+
+        void setArguments(const FunctionArgument::List &args);
+        FunctionArgument::List arguments() const;
+
+        /**
+         * This is a convenience function. Calling this once, is equal to
+         * calling setArguments() with a list containing a FunctionsArgument with name @p name
+         * and type @p type.
+         */
+        void appendArgument(const QXmlName::LocalNameCode name,
+                            const SequenceType::Ptr &type);
+
+        /**
+         * Checks whether @p arity is within the range of allowed count of arguments. For example,
+         * when the minimum arguments is 1 and maximum arguments 2, @c false will be returned for
+         * passing 0 while @c true will be returned when 2 is passed.
+         */
+        bool isArityValid(const xsInteger arity) const;
+
+        Arity minimumArguments() const;
+        Arity maximumArguments() const;
+
+        /**
+         * The return type of this function signature. For example, if the represented function
+         * signature is <tt>fn:string() as xs:string</tt>, the return type is <tt>xs:string</tt>.
+         */
+        SequenceType::Ptr returnType() const;
+
+        /**
+         * The properties that the corresponding FunctionCall instance should return in
+         * Expression::properties().
+         */
+        Expression::Properties properties() const;
+
+        /**
+         * Determines whether this FunctionSignature is equal to @p other, taking
+         * into account XPath's function polymorphism. @p other is equal to this
+         * FunctionSignature if their name() instances are equal, and that the maximumArguments()
+         * and minimumArguments() arguments of @p other are allowed, as per isArityValid().
+         *
+         * In other words, this equalness operator can return @c true for different
+         * signatures, but it do make sense since a FunctionSignature can represent
+         * multiple signatures.
+         *
+         * @returns @c true if this FunctionSignature is equal to @p other, otherwise @c false
+         */
+        bool operator==(const FunctionSignature &other) const;
+
+        /**
+         * Builds a string representation for this function signature. The syntax
+         * used is the one used in the XQuery. It looks like this:
+         *
+         * <tt>prefix:function-name($parameter-name as parameter-type, ...) as return-type</tt>
+         *
+         * The prefix used for the name is conventional. For example, for constructor functions
+         * is @c xs used.
+         *
+         * @see <a href="http://www.w3.org/TR/xpath-functions/#func-signatures">XQuery 1.0 and
+         * XPath 2.0 Functions and Operators, 1.4 Function Signatures and Descriptions</a>
+         */
+        QString displayName(const NamePool::Ptr &np) const;
+
+        /**
+         * The ID that the corresponding FunctionCall instance should return in
+         * Expression::id().
+         */
+        Expression::ID id() const;
+
+    private:
+        Q_DISABLE_COPY(FunctionSignature)
+
+        const Arity                     m_minArgs;
+        const Arity                     m_maxArgs;
+        const SequenceType::Ptr         m_returnType;
+        FunctionArgument::List          m_arguments;
+        const Expression::Properties    m_props;
+        const Expression::ID            m_id;
+    };
+
+    /**
+     * @short Formats FunctionSignature.
+     */
+    static inline QString formatFunction(const NamePool::Ptr &np, const FunctionSignature::Ptr &func)
+    {
+        return QLatin1String("<span class='XQuery-function'>")  +
+               escape(func->displayName(np))                    +
+               QLatin1String("</span>");
+    }
+}
+
+QT_END_NAMESPACE
+
+QT_END_HEADER
+
+#endif