elexis
5d2c20beb0
Replace boost::hash_combine with a lib/hash.h hash_combine performing
the same statement.
Replace inconspicuous global boost hash_value specializations with
std::hash specializations.
No performance difference was observed in three simple MeshManager
measurements.
Remove unused TAG_MASK and h_tag in h_mgr.cpp following 0748c5a75e.
Replace typedef with using keyword and sort header includes.
Differential Revision: https://code.wildfiregames.com/D2441
Tested on: clang 9.0.0, gcc 9.2.0, Jenkins/vs2015, Jenkins/gcc6
This was SVN commit r23191.
36 lines
1.4 KiB
C++
36 lines
1.4 KiB
C++
/* Copyright (C) 2019 Wildfire Games.
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining
|
|
* a copy of this software and associated documentation files (the
|
|
* "Software"), to deal in the Software without restriction, including
|
|
* without limitation the rights to use, copy, modify, merge, publish,
|
|
* distribute, sublicense, and/or sell copies of the Software, and to
|
|
* permit persons to whom the Software is furnished to do so, subject to
|
|
* the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included
|
|
* in all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
|
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
|
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
|
|
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
|
|
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
|
|
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
|
|
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
|
|
*/
|
|
|
|
#ifndef INCLUDED_HASH
|
|
#define INCLUDED_HASH
|
|
|
|
/**
|
|
* This function is the same as hash_combine, i.e. allows dropping the boost dependency just for this function.
|
|
*/
|
|
template <typename T>
|
|
void hash_combine(std::size_t& seed, const T& val)
|
|
{
|
|
seed ^= std::hash<T>()(val) + 0x9e3779b9 + (seed << 6) + (seed >> 2);
|
|
}
|
|
|
|
#endif // #ifndef INCLUDED_HASH
|