coffee/etl
1
0
Fork 0
mirror of https://github.com/ETLCPP/etl.git synced 2026-04-30 19:09:10 +08:00
Code Issues Packages Projects Releases Wiki Activity

Added const version of exchange. Added exchange tests

Browse Source
This commit is contained in:
jwellbelove 2016-12-15 14:15:06 +00:00
parent d5aeff4a8e
commit ed785da11b
2 changed files with 69 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
src/utility.h
View File

@ -43,6 +43,14 @@ namespace etl
object = new_value;
return old_value;
}
template <typename T, typename U = T>
T exchange(T& object, const U& new_value)
{
T old_value = object;
object = new_value;
return old_value;
}
}
#endif

61
test/test_utility.cpp Normal file
View File

@ -0,0 +1,61 @@
/******************************************************************************
The MIT License(MIT)
Embedded Template Library.
https://github.com/ETLCPP/etl
http://www.etlcpp.com
Copyright(c) 2014 jwellbelove
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.
******************************************************************************/
#include <UnitTest++/UnitTest++.h>
#include "../src/utility.h"
namespace
{
SUITE(test_utility)
{
//=========================================================================
TEST(test_exchange)
{
int a = 1;
int b = 2;
int c = etl::exchange(a, b); // c = a, a = b
CHECK_EQUAL(2, a);
CHECK_EQUAL(2, b);
CHECK_EQUAL(1, c);
}
//=========================================================================
TEST(test_exchange_const)
{
int a = 1;
const int b = 2;
int c = etl::exchange(a, b); // c = a, a = b
CHECK_EQUAL(2, a);
CHECK_EQUAL(2, b);
CHECK_EQUAL(1, c);
}
};
}