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Code submissions have continually suffered from formatting inconsistencies that constantly have to be addressed. Using clang-format simplifies this by making code formatting more consistent, and allows automation of the code formatting so that maintainers can focus more on the code itself instead of code formatting.
70 lines
1.5 KiB
C++
70 lines
1.5 KiB
C++
/*
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* Based on Loki::ScopeGuard
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*/
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#pragma once
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#include <utility>
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namespace scope_guard_util {
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template<typename FunctionType> class ScopeGuard {
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public:
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void dismiss() noexcept { dismissed_ = true; }
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explicit ScopeGuard(const FunctionType &fn) : function_(fn) {}
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explicit ScopeGuard(FunctionType &&fn) : function_(std::move(fn)) {}
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ScopeGuard(ScopeGuard &&other)
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: dismissed_(other.dismissed_),
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function_(std::move(other.function_))
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{
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other.dismissed_ = true;
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}
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~ScopeGuard() noexcept
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{
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if (!dismissed_)
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execute();
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}
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private:
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void *operator new(size_t) = delete;
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void execute() noexcept { function_(); }
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bool dismissed_ = false;
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FunctionType function_;
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};
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template<typename FunctionType>
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ScopeGuard<typename std::decay<FunctionType>::type>
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make_guard(FunctionType &&fn)
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{
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return ScopeGuard<typename std::decay<FunctionType>::type>{
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std::forward<FunctionType>(fn)};
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}
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namespace detail {
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enum class ScopeGuardOnExit {};
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template<typename FunctionType>
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ScopeGuard<typename std::decay<FunctionType>::type>
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operator+(detail::ScopeGuardOnExit, FunctionType &&fn)
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{
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return ScopeGuard<typename std::decay<FunctionType>::type>(
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std::forward<FunctionType>(fn));
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}
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}
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} // namespace scope_guard_util
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#define SCOPE_EXIT_CONCAT2(x, y) x##y
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#define SCOPE_EXIT_CONCAT(x, y) SCOPE_EXIT_CONCAT2(x, y)
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#define SCOPE_EXIT \
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auto SCOPE_EXIT_CONCAT(SCOPE_EXIT_STATE, __LINE__) = \
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::scope_guard_util::detail::ScopeGuardOnExit() + [&]() noexcept
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