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99 lines
3.0 KiB
99 lines
3.0 KiB
/*
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* This program source code file is part of KiCad, a free EDA CAD application.
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*
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* Copyright (C) 2017 CERN
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* @author Maciej Suminski <maciej.suminski@cern.ch>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 3
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef ENUM_VECTOR_H
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#define ENUM_VECTOR_H
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#include <iterator>
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#include <type_traits>
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/**
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* Macro to create const vectors containing enum values to enable easy iteration. Do not use in new
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* code. Use the DEFINE_ENUM_CLASS_WITH_ITERATOR and DECLARE_ENUM_CLASS_ITERATOR macros instead
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* (unless they don't work ;) ).
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*
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* Usage:
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* [header]
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* A {
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* DEFINE_ENUM_VECTOR( COLOR, { RED, GREEN, BLUE } )
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* };
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*
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* [source]
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* for( COLOR color : COLOR_vector ) {
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* // do sth with color
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* }
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*
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* DECLARE_ENUM_VECTOR( COLORS );
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*/
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#define DEFINE_ENUM_VECTOR( enumName, ... ) \
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enum enumName __VA_ARGS__; \
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static constexpr enumName enumName##_vector[] = __VA_ARGS__;
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#define DECLARE_ENUM_VECTOR( className, enumName ) \
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constexpr className::enumName className::enumName##_vector[];
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/**
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* Macro to create const vectors containing enum class values to enable easy iteration.
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*
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* Usage:
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* [header]
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* A {
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* DEFINE_ENUM_CLASS_WITH_ITERATOR( COLOR, RED, GREEN, BLUE )
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* };
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*
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* [source]
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* for( COLOR color : COLOR_ITERATOR() ) {
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* // do sth with color
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* }
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*/
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#define DEFINE_ENUM_CLASS_WITH_ITERATOR( enumName, beginVal, ... ) \
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enum class enumName : int { beginVal, __VA_ARGS__, _ENUM_END }; \
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typedef ENUM_ITERATOR<enumName, enumName::beginVal, enumName::_ENUM_END> enumName##_ITERATOR;
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template <typename T, T beginVal, T endVal>
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class ENUM_ITERATOR
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{
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typedef typename std::underlying_type<T>::type val_t;
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int val;
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public:
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using value_type = T;
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using difference_type = std::ptrdiff_t;
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using pointer = T*;
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using reference = T&;
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using iterator_category = std::input_iterator_tag;
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ENUM_ITERATOR( const T& f ) : val( static_cast<val_t>( f ) ) {}
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ENUM_ITERATOR() : val( static_cast<val_t>( beginVal ) ) {}
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ENUM_ITERATOR operator++()
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{
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val++;
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return *this;
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}
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T operator*() { return static_cast<T>( val ); }
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ENUM_ITERATOR begin() { return *this; }
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ENUM_ITERATOR end() { return ENUM_ITERATOR( endVal ); }
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bool operator==( const ENUM_ITERATOR& aIt ) const { return val == aIt.val; }
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bool operator!=( const ENUM_ITERATOR& aIt ) const { return val != aIt.val; }
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};
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#endif /* ENUM_VECTOR_H */
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