mirror of
https://github.com/triqs/dft_tools
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46 lines
1.7 KiB
C++
46 lines
1.7 KiB
C++
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/*******************************************************************************
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*
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* TRIQS: a Toolbox for Research in Interacting Quantum Systems
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*
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* Copyright (C) 2012 by M. Ferrero, O. Parcollet
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*
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* TRIQS is free software: you can redistribute it and/or modify it under the
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* terms of the GNU General Public License as published by the Free Software
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* Foundation, either version 3 of the License, or (at your option) any later
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* version.
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*
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* TRIQS is distributed in the hope that it will be useful, but WITHOUT ANY
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* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License along with
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* TRIQS. If not, see <http://www.gnu.org/licenses/>.
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*
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******************************************************************************/
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#ifndef TRIQS_UTILITY_SCOPE_GUARD_H
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#define TRIQS_UTILITY_SCOPE_GUARD_H
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namespace triqs { namespace utility {
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// adapted from A. Alexandrescu talk, C++ & beyond 2013.
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template <class Fun>
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class scope_guard {
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Fun f_;
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bool active_;
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public:
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scope_guard(Fun f) : f_(std::move(f)) , active_(true) {}
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~scope_guard() { if (active_) f_(); }
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void dismiss() { active_ = false; }
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bool active() const { return active_;}
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scope_guard() = delete;
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scope_guard(const scope_guard&) = delete;
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scope_guard(scope_guard&& rhs) : f_(std::move(rhs.f_)) , active_(rhs.active_) { rhs.dismiss(); }
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scope_guard& operator=(const scope_guard&) = delete;
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scope_guard& operator=(scope_guard&& rhs) { using std::swap; swap(f_,rhs.f_); swap(active_, rhs.active_); return *this;}
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};
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template <class Fun> scope_guard<Fun> scopeGuard(Fun f) { return scope_guard<Fun>(std::move(f)); }
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}}
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#endif
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