diff -r 000000000000 -r 1918ee327afb src/xmlpatterns/functions/qfunctionsignature.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/xmlpatterns/functions/qfunctionsignature.cpp	Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,158 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 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.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qxmlname.h"
+
+#include "qfunctionsignature_p.h"
+
+QT_BEGIN_NAMESPACE
+
+using namespace QPatternist;
+
+FunctionSignature::FunctionSignature(const QXmlName nameP,
+                                     const Arity minArgs,
+                                     const Arity maxArgs,
+                                     const SequenceType::Ptr &returnTypeP,
+                                     const Expression::Properties props,
+                                     const Expression::ID idP) : CallTargetDescription(nameP)
+                                                               , m_minArgs(minArgs)
+                                                               , m_maxArgs(maxArgs)
+                                                               , m_returnType(returnTypeP)
+                                                               , m_arguments()
+                                                               , m_props(props)
+                                                               , m_id(idP)
+{
+    Q_ASSERT(minArgs <= maxArgs || maxArgs == FunctionSignature::UnlimitedArity);
+    Q_ASSERT(m_maxArgs >= -1);
+    Q_ASSERT(returnTypeP);
+}
+
+void FunctionSignature::appendArgument(const QXmlName::LocalNameCode nameP,
+                                       const SequenceType::Ptr &type)
+{
+    Q_ASSERT(type);
+
+    m_arguments.append(FunctionArgument::Ptr(new FunctionArgument(QXmlName(StandardNamespaces::empty, nameP), type)));
+}
+
+QString FunctionSignature::displayName(const NamePool::Ptr &np) const
+{
+    QString result;
+    result += np->displayName(name());
+    result += QLatin1Char('(');
+
+    FunctionArgument::List::const_iterator it(m_arguments.constBegin());
+    const FunctionArgument::List::const_iterator end(m_arguments.constEnd());
+
+    if(it != end)
+    {
+        while(true)
+        {
+            result += QLatin1Char('$');
+            result += np->displayName((*it)->name());
+            result += QLatin1String(" as ");
+            result += (*it)->type()->displayName(np);
+
+            ++it;
+            if(it == end)
+                break;
+
+            result += QLatin1String(", ");
+        }
+    }
+
+    if(m_maxArgs == FunctionSignature::UnlimitedArity)
+        result += QLatin1String(", ...");
+
+    result += QLatin1String(") as ");
+    result += m_returnType->displayName(np);
+
+    return result;
+}
+
+bool FunctionSignature::operator==(const FunctionSignature &other) const
+{
+    return name() == other.name() &&
+           isArityValid(other.maximumArguments()) &&
+           isArityValid(other.minimumArguments());
+}
+
+void FunctionSignature::setArguments(const FunctionArgument::List &args)
+{
+    m_arguments = args;
+}
+
+FunctionArgument::List FunctionSignature::arguments() const
+{
+    return m_arguments;
+}
+
+bool FunctionSignature::isArityValid(const xsInteger arity) const
+{
+    return arity >= m_minArgs && arity <= m_maxArgs;
+}
+
+FunctionSignature::Arity FunctionSignature::minimumArguments() const
+{
+    return m_minArgs;
+}
+
+FunctionSignature::Arity FunctionSignature::maximumArguments() const
+{
+    return m_maxArgs;
+}
+
+SequenceType::Ptr FunctionSignature::returnType() const
+{
+    return m_returnType;
+}
+
+Expression::Properties FunctionSignature::properties() const
+{
+    return m_props;
+}
+
+Expression::ID FunctionSignature::id() const
+{
+    return m_id;
+}
+
+QT_END_NAMESPACE