mirror of
https://github.com/ecency/ecency-mobile.git
synced 2024-12-26 23:05:00 +03:00
63 lines
2.0 KiB
C++
63 lines
2.0 KiB
C++
/*!
|
|
@file
|
|
Forward declares `boost::hana::mod`.
|
|
|
|
@copyright Louis Dionne 2013-2016
|
|
Distributed under the Boost Software License, Version 1.0.
|
|
(See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
|
|
*/
|
|
|
|
#ifndef BOOST_HANA_FWD_MOD_HPP
|
|
#define BOOST_HANA_FWD_MOD_HPP
|
|
|
|
#include <boost/hana/config.hpp>
|
|
#include <boost/hana/core/when.hpp>
|
|
|
|
|
|
BOOST_HANA_NAMESPACE_BEGIN
|
|
//! Generalized integer modulus.
|
|
//! @ingroup group-EuclideanRing
|
|
//!
|
|
//! Given two elements of an EuclideanRing `x` and `y`, with `y`
|
|
//! nonzero, `mod` returns the modulus of the division of `x` by `y`.
|
|
//! In other words, `mod` can be seen as an equivalent to `%`.
|
|
//!
|
|
//! Cross-type version of the method
|
|
//! --------------------------------
|
|
//! The `mod` method is "overloaded" to handle distinct data types
|
|
//! with certain properties. Specifically, `mod` is defined for
|
|
//! _distinct_ data types `A` and `B` such that
|
|
//! 1. `A` and `B` share a common data type `C`, as determined by the
|
|
//! `common` metafunction
|
|
//! 2. `A`, `B` and `C` are all `EuclideanRing`s when taken individually
|
|
//! 3. `to<C> : A -> B` and `to<C> : B -> C` are `Ring`-embeddings, as
|
|
//! determined by the `is_embedding` metafunction.
|
|
//!
|
|
//! In that case, `mod` is defined as
|
|
//! @code
|
|
//! mod(x, y) = mod(to<C>(x), to<C>(y))
|
|
//! @endcode
|
|
//!
|
|
//!
|
|
//! Example
|
|
//! -------
|
|
//! @include example/mod.cpp
|
|
#ifdef BOOST_HANA_DOXYGEN_INVOKED
|
|
constexpr auto mod = [](auto&& x, auto&& y) -> decltype(auto) {
|
|
return tag-dispatched;
|
|
};
|
|
#else
|
|
template <typename T, typename U, typename = void>
|
|
struct mod_impl : mod_impl<T, U, when<true>> { };
|
|
|
|
struct mod_t {
|
|
template <typename X, typename Y>
|
|
constexpr decltype(auto) operator()(X&& x, Y&& y) const;
|
|
};
|
|
|
|
constexpr mod_t mod{};
|
|
#endif
|
|
BOOST_HANA_NAMESPACE_END
|
|
|
|
#endif // !BOOST_HANA_FWD_MOD_HPP
|