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scope_exit: Move over fix to use CONCAT2.

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This commit is contained in:
bunnei 2015-02-12 19:13:57 -05:00
parent 29218fa302
commit 1ac4d1209b
1 changed files with 6 additions and 2 deletions
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8
source/common/scope_exit.h
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@ -1,5 +1,5 @@
// Copyright 2014 Citra Emulator Project // Copyright 2014 Citra Emulator Project
// Licensed under GPLv2+ // Licensed under GPLv2 or any later version
// Refer to the license.txt file included. // Refer to the license.txt file included.
#pragma once #pragma once
@ -17,6 +17,10 @@ namespace detail {
ScopeExitHelper<Func> ScopeExit(Func&& func) { return ScopeExitHelper<Func>(std::move(func)); } ScopeExitHelper<Func> ScopeExit(Func&& func) { return ScopeExitHelper<Func>(std::move(func)); }
} }
/// Textually concatenates two tokens. The double-expansion is required by the C preprocessor.
#define CONCAT2(x, y) DO_CONCAT2(x, y)
#define DO_CONCAT2(x, y) x ## y
/** /**
* This macro allows you to conveniently specify a block of code that will run on scope exit. Handy * This macro allows you to conveniently specify a block of code that will run on scope exit. Handy
* for doing ad-hoc clean-up tasks in a function with multiple returns. * for doing ad-hoc clean-up tasks in a function with multiple returns.
@ -34,4 +38,4 @@ namespace detail {
* } * }
* \endcode * \endcode
*/ */
#define SCOPE_EXIT(body) auto scope_exit_helper_##__LINE__ = detail::ScopeExit([&]() body) #define SCOPE_EXIT(body) auto CONCAT2(scope_exit_helper_, __LINE__) = detail::ScopeExit([&]() body)