| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | //====================================================================================================================== | ||
| 2 | /* | ||
| 3 | POLYFLOAT - Extended precision floating points | ||
| 4 | Copyright : POLYFLOAT Contributors & Maintainers | ||
| 5 | SPDX-License-Identifier: BSL-1.0 | ||
| 6 | */ | ||
| 7 | //====================================================================================================================== | ||
| 8 | #pragma once | ||
| 9 | |||
| 10 | #include <polyfloat/details/callable.hpp> | ||
| 11 | #include <polyfloat/types/concepts.hpp> | ||
| 12 | #include <polyfloat/types/traits.hpp> | ||
| 13 | #include <type_traits> | ||
| 14 | #include <polyfloat/module/core/is_flint.hpp> | ||
| 15 | #include <polyfloat/module/core/ldexp.hpp> | ||
| 16 | |||
| 17 | namespace plf | ||
| 18 | { | ||
| 19 | |||
| 20 | template<typename Options> | ||
| 21 | struct is_even_t : plf::elementwise_callable<is_even_t, eve::is_even_t, Options, raw_option, pedantic_option> | ||
| 22 | { | ||
| 23 | template<concepts::polyfloat_like Z> | ||
| 24 | 97143 | POLYFLOAT_ABI constexpr eve::as_logical_t<plf::as_component_type_t<Z>> operator()(Z z) const noexcept | |
| 25 | { | ||
| 26 | 97143 | return POLYFLOAT_CALL(z); | |
| 27 | } | ||
| 28 | |||
| 29 | 95521 | POLYFLOAT_CALLABLE_OBJECT(is_even_t, is_even_); | |
| 30 | }; | ||
| 31 | |||
| 32 | //================================================================================================ | ||
| 33 | //! @addtogroup core | ||
| 34 | //! @{ | ||
| 35 | //! @var is_even | ||
| 36 | //! @brief returns a logical true if and only if the element value is a floating value | ||
| 37 | //! representing an even integer | ||
| 38 | //! | ||
| 39 | //! @groupheader{Header file} | ||
| 40 | //! | ||
| 41 | //! @code | ||
| 42 | //! #include <eve/module/module/core.hpp> | ||
| 43 | //! @endcode | ||
| 44 | //! | ||
| 45 | //! @groupheader{Callable Signatures} | ||
| 46 | //! | ||
| 47 | //! @code | ||
| 48 | //! namespace plf | ||
| 49 | //! { | ||
| 50 | //! // Regular overloads | ||
| 51 | //! constexpr auto is_even(floating_value auto x) noexcept; | ||
| 52 | //! } | ||
| 53 | //! @endcode | ||
| 54 | //! | ||
| 55 | //! **Parameters** | ||
| 56 | //! | ||
| 57 | //! * `x`: [argument](@ref eve::value). | ||
| 58 | //! | ||
| 59 | //! **Return value** | ||
| 60 | //! | ||
| 61 | //! 1. returns true if and only if x represent an even number | ||
| 62 | //! | ||
| 63 | //! @groupheader{Example} | ||
| 64 | //! @godbolt{doc/core/is_even.cpp} | ||
| 65 | //================================================================================================ | ||
| 66 | inline constexpr auto is_even = eve::functor<is_even_t>; | ||
| 67 | //====================================================================================================================== | ||
| 68 | //! @} | ||
| 69 | //====================================================================================================================== | ||
| 70 | } | ||
| 71 | |||
| 72 | namespace plf::_ | ||
| 73 | { | ||
| 74 | template<typename Z, eve::callable_options O> | ||
| 75 | 95521 | constexpr auto is_even_(POLYFLOAT_DELAY(), O const&, Z const& z) noexcept | |
| 76 | { | ||
| 77 | 95521 | auto t = is_flint(z); | |
| 78 | 95521 | return t && is_flint(ldexp(z, -1)); | |
| 79 | } | ||
| 80 | } | ||
| 81 |