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add _ placeholder User-defined literals

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This commit is contained in:
bolero-MURAKAMI 2013-07-07 19:10:25 +09:00
parent 50f2ba6e31
commit 2f86a59273
7 changed files with 188 additions and 116 deletions
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48
sprout/functional/bind/udl.hpp Normal file
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#ifndef SPROUT_FUNCTIONAL_BIND_UDL_HPP
#define SPROUT_FUNCTIONAL_BIND_UDL_HPP
#include <sprout/config.hpp>
#include <sprout/functional/bind/placeholder.hpp>
#if SPROUT_USE_USER_DEFINED_LITERALS
#include <sprout/type_traits/identity.hpp>
#include <sprout/detail/digits_to_int.hpp>
namespace sprout {
//
// placeholders_result
//
template<char... Chars>
struct placeholders_result
: public sprout::identity<
sprout::placeholder<sprout::detail::digits_to_int<int, Chars...>::value>
>
{};
namespace placeholders {
namespace udl {
//
// _
//
template<char... Chars>
SPROUT_CONSTEXPR typename sprout::placeholders_result<Chars...>::type
operator"" _() {
typedef typename sprout::placeholders_result<Chars...>::type type;
return type();
}
} // namespace udl
} // namespace placeholders
namespace udl {
namespace placeholders {
using sprout::placeholders::udl::operator"" _;
} // namespace placeholders
using sprout::placeholders::udl::operator"" _;
} // namespace udl
} // namespace sprout
#endif // #if SPROUT_USE_USER_DEFINED_LITERALS
#endif // #ifndef SPROUT_FUNCTIONAL_BIND_UDL_HPP