Initial import from the monolithic kdelibs.

This is the beginning of revision history for this module. If you
want to look at revision history older than this, please refer to the
techbase wiki for how to use Git history grafting. At the time of
writing, this wiki is located here:

http://community.kde.org/Frameworks/GitOldHistory

If you have already performed the grafting and you don't see any
history beyond this commit, try running "git log" with the "--follow"
argument.

Branched from the monolithic repo, kdelibs frameworks branch, at commit
162066dbbecde401a7347a1cff4fe72a9c919f58

1 files changed, 120 insertions, 0 deletions

diff --git a/tier1/kconfig/src/core/conversion_check.h b/tier1/kconfig/src/core/conversion_check.h
new file mode 100644
index 00000000..23bdcf04
--- /dev/null
+++ b/tier1/kconfig/src/core/conversion_check.h
@@ -0,0 +1,120 @@
+/*
+   This file is part of the KDE libraries
+   Copyright (c) 2006 Thomas Braxton <brax108@cox.net>
+
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public
+   License as published by the Free Software Foundation; either
+   version 2 of the License, or (at your option) any later version.
+
+   This library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public License
+   along with this library; see the file COPYING.LIB.  If not, write to
+   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+   Boston, MA 02110-1301, USA.
+*/
+
+
+#ifndef CONVERSION_CHECK_H
+#define CONVERSION_CHECK_H
+
+#include <QtCore/QString>
+#include <QtCore/QDate>
+#include <QtCore/QPoint>
+#include <QtCore/QSize>
+#include <QtCore/QRect>
+#include <QtCore/QVariant>
+
+class QColor;
+class QFont;
+
+namespace ConversionCheck {
+
+// used to distinguish between supported/unsupported types
+struct supported { };
+struct unsupported { };
+
+// traits type class to define support for constraints
+template <typename T>
+struct QVconvertible
+{
+  typedef unsupported toQString;
+  typedef unsupported toQVariant;
+};
+
+// constraint classes
+template <typename T>
+struct type_toQString
+{
+  void constraint() { supported x = y; Q_UNUSED(x); }
+  typename QVconvertible<T>::toQString y;
+};
+
+template <typename T>
+struct type_toQVariant
+{
+  void constraint() { supported x = y; Q_UNUSED(x); }
+  typename QVconvertible<T>::toQVariant y;
+};
+
+
+// check if T is convertible to QString thru QVariant
+// if not supported can't be used in QList<T> functions
+template <typename T>
+inline void to_QString()
+{
+  void (type_toQString<T>::*x)() = &type_toQString<T>::constraint;
+  Q_UNUSED(x);
+}
+
+// check if T is convertible to QVariant & supported in readEntry/writeEntry
+template <typename T>
+inline void to_QVariant()
+{
+  void (type_toQVariant<T>::*x)() = &type_toQVariant<T>::constraint;
+  Q_UNUSED(x);
+}
+
+// define for all types handled in readEntry/writeEntry
+// string_support - is supported by QVariant(type).toString(),
+//                  can be used in QList<T> functions
+// variant_support - has a QVariant constructor
+#define QVConversions(type, string_support, variant_support) \
+template <> struct QVconvertible<type> {\
+ typedef string_support toQString;\
+ typedef variant_support toQVariant;\
+}
+
+// The only types needed here are the types handled in readEntry/writeEntry
+// the default QVconvertible will take care of the rest.
+QVConversions(bool, supported, supported);
+QVConversions(int, supported, supported);
+QVConversions(unsigned int, supported, supported);
+QVConversions(long long, supported, supported);
+QVConversions(unsigned long long, supported, supported);
+QVConversions(float, supported, supported);
+QVConversions(double, supported, supported);
+QVConversions(QString, supported, supported);
+QVConversions(QColor, unsupported, supported);
+QVConversions(QFont, supported, supported);
+QVConversions(QDateTime, unsupported, supported);
+QVConversions(QDate, unsupported, supported);
+QVConversions(QSize, unsupported, supported);
+QVConversions(QRect, unsupported, supported);
+QVConversions(QPoint, unsupported, supported);
+QVConversions(QSizeF, unsupported, supported);
+QVConversions(QRectF, unsupported, supported);
+QVConversions(QPointF, unsupported, supported);
+QVConversions(QByteArray, supported, supported);
+QVConversions(QStringList, unsupported, supported);
+QVConversions(QVariantList, unsupported, supported);
+QVConversions(QUrl, supported, supported);
+QVConversions(QList<QUrl>, unsupported, supported);
+}
+
+#endif
+