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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-15 05:54:39 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-15 05:54:39 +0000
commit267c6f2ac71f92999e969232431ba04678e7437e (patch)
tree358c9467650e1d0a1d7227a21dac2e3d08b622b2 /include/o3tl/enumrange.hxx
parentInitial commit. (diff)
downloadlibreoffice-267c6f2ac71f92999e969232431ba04678e7437e.tar.xz
libreoffice-267c6f2ac71f92999e969232431ba04678e7437e.zip
Adding upstream version 4:24.2.0.upstream/4%24.2.0
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'include/o3tl/enumrange.hxx')
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diff --git a/include/o3tl/enumrange.hxx b/include/o3tl/enumrange.hxx
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed
+ * with this work for additional information regarding copyright
+ * ownership. The ASF licenses this file to you under the Apache
+ * License, Version 2.0 (the "License"); you may not use this file
+ * except in compliance with the License. You may obtain a copy of
+ * the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#ifndef INCLUDED_O3TL_ENUMRANGE_HXX
+#define INCLUDED_O3TL_ENUMRANGE_HXX
+
+namespace o3tl {
+
+///
+/// This is a container convenience class iterating over scoped enumerations.
+///
+/// This assumes that the 'enum class' definition
+/// - starts at zero
+/// - has no holes in its sequence of values
+/// - defines a value called LAST which refers to the greatest constant.
+///
+/// Use like this:
+/// enum class COLOR { RED, GREEN, BLUE, LAST=BLUE };
+/// for( auto e : o3tl::enumrange<Color>() )
+/// ....;
+///
+/// \param T the 'enum class' type.
+template< typename T>
+class enumrange
+{
+public:
+ class Iterator
+ {
+ public:
+ Iterator( int value ) :
+ m_value( value )
+ {
+ }
+
+ T operator*( void ) const
+ {
+ return static_cast<T>(m_value);
+ }
+
+ void operator++( void )
+ {
+ ++m_value;
+ }
+
+ bool operator!=( Iterator rhs ) const
+ {
+ return m_value != rhs.m_value;
+ }
+
+ private:
+ int m_value;
+ };
+};
+
+template< typename T >
+typename enumrange<T>::Iterator begin( enumrange<T> )
+{
+ return typename enumrange<T>::Iterator( int(0) );
+}
+
+template< typename T >
+typename enumrange<T>::Iterator end( enumrange<T> )
+{
+ return typename enumrange<T>::Iterator( static_cast<int>(T::LAST) + 1 );
+}
+
+}; // namespace o3tl
+
+#endif /* INCLUDED_O3TL_ENUMRANGE_HXX */
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */