mirror of
https://github.com/bolero-MURAKAMI/Sprout.git
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83 lines
2.8 KiB
C++
83 lines
2.8 KiB
C++
/*=============================================================================
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Copyright (c) 2011-2014 Bolero MURAKAMI
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https://github.com/bolero-MURAKAMI/Sprout
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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=============================================================================*/
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#ifndef SPROUT_WEED_TRAITS_PARSER_ATTRIBUTE_OF_HPP
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#define SPROUT_WEED_TRAITS_PARSER_ATTRIBUTE_OF_HPP
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#include <type_traits>
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#include <sprout/config.hpp>
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#include <sprout/weed/traits/expr/is_expr.hpp>
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#include <sprout/weed/unused.hpp>
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#include <sprout/weed/expr/expr.hpp>
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#include <sprout/weed/expr/tag.hpp>
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#include <sprout/weed/traits/type/is_char_type.hpp>
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#include <sprout/weed/traits/type/is_c_str.hpp>
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#include <sprout/weed/traits/type/is_string.hpp>
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#include <sprout/weed/traits/expr/is_expr.hpp>
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#include <sprout/weed/traits/expr/terminal_of.hpp>
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#include <sprout/weed/traits/parser/is_parser.hpp>
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namespace sprout {
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namespace weed {
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namespace traits {
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//
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// attribute_of
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//
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template<typename T, typename Iterator, typename Context, typename = void>
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struct attribute_of;
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template<typename T, typename Iterator, typename Context>
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struct attribute_of<T const, Iterator, Context>
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: public sprout::weed::traits::attribute_of<T, Iterator, Context>
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{};
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template<typename T, typename Iterator, typename Context>
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struct attribute_of<
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T,
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Iterator,
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Context,
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typename std::enable_if<
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sprout::weed::traits::is_parser<T>::value
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&& !sprout::weed::traits::is_expr<T>::value
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&& !sprout::weed::traits::is_char_type<T>::value
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&& !sprout::weed::traits::is_c_str<T>::value
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&& !sprout::weed::traits::is_string<T>::value
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>::type
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>
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: public T::template attribute<Context, Iterator>
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{};
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template<typename T, typename Iterator, typename Context>
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struct attribute_of<
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T,
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Iterator,
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Context,
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typename std::enable_if<
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sprout::weed::traits::is_expr<T>::value
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>::type
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>
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: public sprout::identity<typename Context::template eval<T>::attribute_type>
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{};
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template<typename T, typename Iterator, typename Context>
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struct attribute_of<
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T,
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Iterator,
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Context,
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typename std::enable_if<
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sprout::weed::traits::is_char_type<T>::value
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|| sprout::weed::traits::is_c_str<T>::value
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|| sprout::weed::traits::is_string<T>::value
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>::type
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>
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: public sprout::weed::traits::attribute_of<
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typename sprout::weed::traits::terminal_of<T>::type,
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Iterator,
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Context
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>
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{};
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} // namespace traits
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} // namespace weed
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} // namespace sprout
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#endif // #ifndef SPROUT_WEED_TRAITS_PARSER_ATTRIBUTE_OF_HPP
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