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Sprout/sprout/weed/traits/parser/is_parser.hpp

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2011-11-13 08:54:38 +00:00
#ifndef SPROUT_WEED_TRAITS_PARSER_IS_PARSER_HPP
#define SPROUT_WEED_TRAITS_PARSER_IS_PARSER_HPP
#include <type_traits>
#include <sprout/config.hpp>
#include <sprout/weed/unused.hpp>
#include <sprout/weed/parser/parser_base.hpp>
#include <sprout/weed/traits/type/is_char_type.hpp>
#include <sprout/weed/traits/type/is_c_str.hpp>
#include <sprout/weed/traits/expr/is_expr.hpp>
namespace sprout {
namespace weed {
namespace traits {
//
// is_parser
//
template<typename T, typename = void>
struct is_parser;
template<typename T>
struct is_parser<
T,
typename std::enable_if<
std::is_base_of<sprout::weed::parser_base, T>::value
&& !std::is_const<T>::value
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>::type
>
: public std::true_type
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{};
template<typename T>
struct is_parser<
T,
typename std::enable_if<
sprout::weed::traits::is_expr<T>::value
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&& !std::is_const<T>::value
>::type
>
: public std::true_type
{};
template<typename T>
struct is_parser<
T,
typename std::enable_if<
sprout::weed::traits::is_char_type<T>::value
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&& !std::is_const<T>::value
>::type
>
: public std::true_type
{};
template<typename T>
struct is_parser<
T,
typename std::enable_if<
sprout::weed::traits::is_c_str<T>::value
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&& !std::is_const<T>::value
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>::type
>
: public std::true_type
{};
template<typename T>
struct is_parser<
T,
typename std::enable_if<
std::is_const<T>::value
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>::type
>
: public sprout::weed::traits::is_parser<
typename std::remove_const<T>::type
>
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{};
} // namespace traits
} // namespace weed
} // namespace sprout
#endif // #ifndef SPROUT_WEED_TRAITS_PARSER_IS_PARSER_HPP