42 lines
1 KiB
C++
42 lines
1 KiB
C++
// Copyright 2014 Citra Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#pragma once
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#include <utility>
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namespace detail {
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template <typename Func>
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struct ScopeExitHelper {
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explicit ScopeExitHelper(Func&& func) : func(std::move(func)) {}
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~ScopeExitHelper() { func(); }
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Func func;
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};
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template <typename Func>
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ScopeExitHelper<Func> ScopeExit(Func&& func) { return ScopeExitHelper<Func>(std::move(func)); }
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}
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#define CONCAT2(x, y) DO_CONCAT2(x, y)
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#define DO_CONCAT2(x, y) x ## y
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/**
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* This macro allows you to conveniently specify a block of code that will run on scope exit. Handy
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* for doing ad-hoc clean-up tasks in a function with multiple returns.
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*
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* Example usage:
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* \code
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* const int saved_val = g_foo;
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* g_foo = 55;
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* SCOPE_EXIT({ g_foo = saved_val; });
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*
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* if (Bar()) {
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* return 0;
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* } else {
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* return 20;
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* }
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* \endcode
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*/
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#define SCOPE_EXIT(body) auto CONCAT2(scope_exit_helper_, __LINE__) = detail::ScopeExit([&]() body)
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