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// Copyright 2019 Roman Perepelitsa.
//
// This file is part of GitStatus.
//
// GitStatus is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// GitStatus is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with GitStatus. If not, see <https://www.gnu.org/licenses/>.
#ifndef ROMKATV_GITSTATUS_SCOPE_GUARD_H_
#define ROMKATV_GITSTATUS_SCOPE_GUARD_H_
#include <utility>
#define ON_SCOPE_EXIT(capture...) \
auto GITSTATUS_INTERNAL_CAT(_gitstatus_scope_guard_, __COUNTER__) = \
::gitstatus::internal_scope_guard::ScopeGuardGenerator() = [capture]()
#define GITSTATUS_INTERNAL_CAT_I(x, y) x##y
#define GITSTATUS_INTERNAL_CAT(x, y) GITSTATUS_INTERNAL_CAT_I(x, y)
namespace gitstatus {
namespace internal_scope_guard {
void Undefined();
template <class F>
class ScopeGuard {
public:
explicit ScopeGuard(F f) : f_(std::move(f)) {}
~ScopeGuard() { std::move(f_)(); }
ScopeGuard(ScopeGuard&& other) : f_(std::move(other.f_)) { Undefined(); }
private:
F f_;
};
struct ScopeGuardGenerator {
template <class F>
ScopeGuard<F> operator=(F f) const {
return ScopeGuard<F>(std::move(f));
}
};
} // namespace internal_scope_guard
} // namespace gitstatus
#endif // ROMKATV_GITSTATUS_SCOPE_GUARD_H_
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