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59 lines
1.6 KiB
C++
59 lines
1.6 KiB
C++
/*=============================================================================
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Copyright (c) 2014 Paul Fultz II
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protect.h
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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==============================================================================*/
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#ifndef FIT_GUARD_FUNCTION_PROTECT_H
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#define FIT_GUARD_FUNCTION_PROTECT_H
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/// protect
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/// =======
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///
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/// Description
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/// -----------
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///
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/// The `protect` function adaptor can be used to make a bind expression be
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/// treated as a normal function instead. Both `bind` and [`lazy`](lazy.md)
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/// eargerly evaluates nested bind expressions. The `protect` adaptor masks
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/// the type so `bind` or [`lazy`](lazy.md) no longer recognizes the function
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/// as bind expression and evaluates it.
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///
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/// Synopsis
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/// --------
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///
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/// template<class F>
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/// constexpr protect_adaptor<F> protect(F f);
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///
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/// Requirements
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/// ------------
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///
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/// F must be:
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///
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/// * [Callable](concepts.md#callable)
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/// * MoveConstructible
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///
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#include <utility>
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#include <fit/reveal.hpp>
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#include <fit/detail/forward.hpp>
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#include <fit/detail/make.hpp>
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#include <fit/detail/static_const_var.hpp>
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namespace fit {
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template<class F>
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struct protect_adaptor : detail::callable_base<F>
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{
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typedef protect_adaptor fit_rewritable1_tag;
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template<class... Ts>
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constexpr protect_adaptor(Ts&&... xs) : detail::callable_base<F>(FIT_FORWARD(Ts)(xs)...)
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{}
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};
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FIT_DECLARE_STATIC_VAR(protect, detail::make<protect_adaptor>);
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} // namespace fit
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#endif
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