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New dynamic capture system: try_capture_all. Previous API based on ma…
…ke_shared_contex/capture is deprecated.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,121 @@ | ||
| #ifndef BOOST_LEAF_CAPTURE_HPP_INCLUDED | ||
| #define BOOST_LEAF_CAPTURE_HPP_INCLUDED | ||
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| // Copyright 2018-2023 Emil Dotchevski and Reverge Studios, Inc. | ||
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| // Distributed under the Boost Software License, Version 1.0. (See accompanying | ||
| // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | ||
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| #include <boost/leaf/config.hpp> | ||
| #include <boost/leaf/handle_errors.hpp> | ||
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| #if BOOST_LEAF_CFG_CAPTURE | ||
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| namespace boost { namespace leaf { | ||
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| namespace leaf_detail | ||
| { | ||
| template <class R, bool IsResult = is_result_type<R>::value> | ||
| struct is_result_tag; | ||
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| template <class R> | ||
| struct is_result_tag<R, false> | ||
| { | ||
| }; | ||
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| template <class R> | ||
| struct is_result_tag<R, true> | ||
| { | ||
| }; | ||
| } | ||
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| #ifdef BOOST_LEAF_NO_EXCEPTIONS | ||
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| namespace leaf_detail | ||
| { | ||
| template <class R, class F, class... A> | ||
| inline | ||
| decltype(std::declval<F>()(std::forward<A>(std::declval<A>())...)) | ||
| capture_impl(is_result_tag<R, false>, F && f, A... a) noexcept | ||
| { | ||
| return std::forward<F>(f)(std::forward<A>(a)...); | ||
| } | ||
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| template <class R, class Future> | ||
| inline | ||
| decltype(std::declval<Future>().get()) | ||
| future_get_impl(is_result_tag<R, false>, Future & fut) noexcept | ||
| { | ||
| return fut.get(); | ||
| } | ||
| } | ||
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| #else | ||
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| namespace leaf_detail | ||
| { | ||
| // Not defined, no longer supported. Please use try_capture_all instead of make_shared_context/capture. | ||
| template <class R, class F, class... A> | ||
| decltype(std::declval<F>()(std::forward<A>(std::declval<A>())...)) | ||
| capture_impl(is_result_tag<R, false>, F && f, A... a); | ||
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| // Not defined, no longer supported. Please use try_capture_all instead of make_shared_context/capture. | ||
| template <class R, class Future> | ||
| decltype(std::declval<Future>().get()) | ||
| future_get_impl(is_result_tag<R, false>, Future & fut ); | ||
| } | ||
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| #endif | ||
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| namespace leaf_detail | ||
| { | ||
| template <class R, class F, class... A> | ||
| inline | ||
| decltype(std::declval<F>()(std::forward<A>(std::declval<A>())...)) | ||
| capture_impl(is_result_tag<R, true>, F && f, A... a) noexcept | ||
| { | ||
| return try_capture_all( | ||
| [&] | ||
| { | ||
| return std::forward<F>(f)(std::forward<A>(a)...); | ||
| } ); | ||
| } | ||
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| template <class R, class Future> | ||
| inline | ||
| decltype(std::declval<Future>().get()) | ||
| future_get_impl(is_result_tag<R, true>, Future & fut) noexcept | ||
| { | ||
| if( auto r = fut.get() ) | ||
| return r; | ||
| else | ||
| { | ||
| r.unload(); | ||
| return r; | ||
| } | ||
| } | ||
| } | ||
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| template <class F, class... A> | ||
| inline | ||
| decltype(std::declval<F>()(std::forward<A>(std::declval<A>())...)) | ||
| capture(context_ptr &&, F && f, A... a) | ||
| { | ||
| using namespace leaf_detail; | ||
| return capture_impl(is_result_tag<decltype(std::declval<F>()(std::forward<A>(std::declval<A>())...))>(), std::forward<F>(f), std::forward<A>(a)...); | ||
| } | ||
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| template <class Future> | ||
| inline | ||
| decltype(std::declval<Future>().get()) | ||
| future_get( Future & fut ) | ||
| { | ||
| using namespace leaf_detail; | ||
| return future_get_impl(is_result_tag<decltype(std::declval<Future>().get())>(), fut); | ||
| } | ||
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| } } | ||
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| #endif | ||
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| #endif |
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