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39 lines
874 B
C
39 lines
874 B
C
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// -*-mode:c++;indent-tabs-mode:nil;c-basic-offset:4;tab-width:8;coding:utf-8-*-
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// vi: set et ft=cpp ts=4 sts=4 sw=4 fenc=utf-8 :vi
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#ifndef CTL_LESS_H_
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#define CTL_LESS_H_
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#include "utility.h"
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namespace ctl {
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template<class T = void>
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struct less
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{
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constexpr bool operator()(const T& lhs, const T& rhs) const
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{
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return lhs < rhs;
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}
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typedef T first_argument_type;
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typedef T second_argument_type;
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typedef bool result_type;
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};
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template<>
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struct less<void>
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{
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template<class T, class U>
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constexpr auto operator()(T&& lhs,
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U&& rhs) const -> decltype(ctl::forward<T>(lhs) <
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ctl::forward<U>(rhs))
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{
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return ctl::forward<T>(lhs) < ctl::forward<U>(rhs);
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}
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typedef void is_transparent;
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};
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} // namespace ctl
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#endif /* CTL_LESS_H_ */
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