Server : Apache/2.4.41 (Ubuntu) System : Linux absol.cf 5.4.0-198-generic #218-Ubuntu SMP Fri Sep 27 20:18:53 UTC 2024 x86_64 User : www-data ( 33) PHP Version : 7.4.33 Disable Function : pcntl_alarm,pcntl_fork,pcntl_waitpid,pcntl_wait,pcntl_wifexited,pcntl_wifstopped,pcntl_wifsignaled,pcntl_wifcontinued,pcntl_wexitstatus,pcntl_wtermsig,pcntl_wstopsig,pcntl_signal,pcntl_signal_get_handler,pcntl_signal_dispatch,pcntl_get_last_error,pcntl_strerror,pcntl_sigprocmask,pcntl_sigwaitinfo,pcntl_sigtimedwait,pcntl_exec,pcntl_getpriority,pcntl_setpriority,pcntl_async_signals,pcntl_unshare, Directory :  /usr/include/boost/hana/fwd/

Upload File : current_dir [ Writeable ] document_root [ Writeable ]

/*!
@file
Forward declares `boost::hana::and_`.

@copyright Louis Dionne 2013-2017
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_AND_HPP
#define BOOST_HANA_FWD_AND_HPP

#include <boost/hana/config.hpp>
#include <boost/hana/core/when.hpp>


BOOST_HANA_NAMESPACE_BEGIN
    //! Return whether all the arguments are true-valued.
    //! @ingroup group-Logical
    //!
    //! `and_` can be called with one argument or more. When called with
    //! two arguments, `and_` uses tag-dispatching to find the right
    //! implementation. Otherwise,
    //! @code
    //!     and_(x) == x
    //!     and_(x, y, ...z) == and_(and_(x, y), z...)
    //! @endcode
    //!
    //!
    //! Example
    //! -------
    //! @include example/and.cpp
#ifdef BOOST_HANA_DOXYGEN_INVOKED
    constexpr auto and_ = [](auto&& x, auto&& ...y) -> decltype(auto) {
        return tag-dispatched;
    };
#else
    template <typename L, typename = void>
    struct and_impl : and_impl<L, when<true>> { };

    struct and_t {
        template <typename X, typename Y>
        constexpr decltype(auto) operator()(X&& x, Y&& y) const;

        template <typename X, typename ...Y>
        constexpr decltype(auto) operator()(X&& x, Y&& ...y) const;
    };

    constexpr and_t and_{};
#endif
BOOST_HANA_NAMESPACE_END

#endif // !BOOST_HANA_FWD_AND_HPP