mirror of
https://github.com/triqs/dft_tools
synced 2024-12-27 06:43:40 +01:00
46 lines
1.7 KiB
C++
46 lines
1.7 KiB
C++
|
/*******************************************************************************
|
||
|
|
*
|
||
|
|
* TRIQS: a Toolbox for Research in Interacting Quantum Systems
|
||
|
|
*
|
||
|
|
* Copyright (C) 2012 by M. Ferrero, O. Parcollet
|
||
|
|
*
|
||
|
|
* TRIQS 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.
|
||
|
|
*
|
||
|
|
* TRIQS 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
|
||
|
|
* TRIQS. If not, see <http://www.gnu.org/licenses/>.
|
||
|
|
*
|
||
|
|
******************************************************************************/
|
||
|
|
#ifndef TRIQS_UTILITY_SCOPE_GUARD_H
|
||
|
|
#define TRIQS_UTILITY_SCOPE_GUARD_H
|
||
|
|
|
||
|
|
namespace triqs { namespace utility {
|
||
|
|
|
||
|
|
// adapted from A. Alexandrescu talk, C++ & beyond 2013.
|
||
|
|
template <class Fun>
|
||
|
|
class scope_guard {
|
||
|
|
Fun f_;
|
||
|
|
bool active_;
|
||
|
|
public:
|
||
|
|
scope_guard(Fun f) : f_(std::move(f)) , active_(true) {}
|
||
|
|
~scope_guard() { if (active_) f_(); }
|
||
|
|
void dismiss() { active_ = false; }
|
||
|
|
bool active() const { return active_;}
|
||
|
|
scope_guard() = delete;
|
||
|
|
scope_guard(const scope_guard&) = delete;
|
||
|
|
scope_guard(scope_guard&& rhs) : f_(std::move(rhs.f_)) , active_(rhs.active_) { rhs.dismiss(); }
|
||
|
|
scope_guard& operator=(const scope_guard&) = delete;
|
||
|
|
scope_guard& operator=(scope_guard&& rhs) { using std::swap; swap(f_,rhs.f_); swap(active_, rhs.active_); return *this;}
|
||
|
|
};
|
||
|
|
|
||
|
|
template <class Fun> scope_guard<Fun> scopeGuard(Fun f) { return scope_guard<Fun>(std::move(f)); }
|
||
|
|
}}
|
||
|
|
#endif
|