mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
53 lines
1.7 KiB
C++
53 lines
1.7 KiB
C++
/*
|
|
This file is part of solidity.
|
|
|
|
solidity 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.
|
|
|
|
solidity 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 solidity. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
// SPDX-License-Identifier: GPL-3.0
|
|
|
|
#include <map>
|
|
|
|
// Contains polyfills of STL functions and algorithms that will become available in C++20.
|
|
namespace solidity::cxx20
|
|
{
|
|
|
|
// Taken from https://en.cppreference.com/w/cpp/container/map/erase_if.
|
|
template<class Key, class T, class Compare, class Alloc, class Pred>
|
|
typename std::map<Key, T, Compare, Alloc>::size_type erase_if(std::map<Key,T,Compare,Alloc>& _c, Pred _pred)
|
|
{
|
|
auto old_size = _c.size();
|
|
for (auto i = _c.begin(), last = _c.end(); i != last;)
|
|
if (_pred(*i))
|
|
i = _c.erase(i);
|
|
else
|
|
++i;
|
|
return old_size - _c.size();
|
|
}
|
|
|
|
// Taken from https://en.cppreference.com/w/cpp/container/unordered_map/erase_if.
|
|
template<class Key, class T, class Hash, class KeyEqual, class Alloc, class Pred>
|
|
typename std::unordered_map<Key, T, Hash, KeyEqual, Alloc>::size_type
|
|
erase_if(std::unordered_map<Key, T, Hash, KeyEqual, Alloc>& _c, Pred _pred)
|
|
{
|
|
auto old_size = _c.size();
|
|
for (auto i = _c.begin(), last = _c.end(); i != last;)
|
|
if (_pred(*i))
|
|
i = _c.erase(i);
|
|
else
|
|
++i;
|
|
return old_size - _c.size();
|
|
}
|
|
|
|
}
|