susumu.yata
null+****@clear*****
Wed May 15 13:04:31 JST 2013
susumu.yata 2013-05-15 13:04:31 +0900 (Wed, 15 May 2013) New Revision: 55ff92b1684ad4c741fb27bf56cce484a0d34219 https://github.com/groonga/grnxx/commit/55ff92b1684ad4c741fb27bf56cce484a0d34219 Message: Add has_starts_with(). Modified files: lib/grnxx/traits.hpp Modified: lib/grnxx/traits.hpp (+21 -1) =================================================================== --- lib/grnxx/traits.hpp 2013-05-15 13:04:11 +0900 (f7cec8e) +++ lib/grnxx/traits.hpp 2013-05-15 13:04:31 +0900 (e7570c2) @@ -51,7 +51,23 @@ template <typename T> struct HasLess { static constexpr bool value() { return std::conditional<std::is_scalar<T>::value, std::true_type, - decltype(HasLessHelper::check<T>(0))>::value; + decltype(HasLessHelper::check<T>(0))>::value; + } +}; + +// Check if T has starts_with() or not. +struct HasStartsWithHelper { + template <typename T> + static auto check(T *p) -> decltype(p->starts_with(*p), std::true_type()); + template <typename> + static auto check(...) -> decltype(std::false_type()); +}; +// Check if T has operator<() or not. +template <typename T> +struct HasStartsWith { + static constexpr bool value() { + return std::conditional<std::is_scalar<T>::value, std::true_type, + decltype(HasStartsWithHelper::check<T>(0))>::value; } }; @@ -60,9 +76,13 @@ template <typename T> struct Traits { using Type = T; using ArgumentType = typename PreferredArgument<T>::Type; + static constexpr bool hass_less() { return HasLess<T>::value(); } + static constexpr bool has_starts_with() { + return HasStartsWith<T>::value(); + } }; } // namespace grnxx -------------- next part -------------- HTML����������������������������...下载
