mirror of
https://github.com/ETLCPP/etl.git
synced 2026-11-09 14:49:53 +08:00
Added a compare template that defines <=, >, >= in terms of std::less or a user supplied comparison class.
This commit is contained in:
John Wellbelove
parent
24e661c63a
commit
c6876f65d1
80
src/compare.h
Normal file
80
src/compare.h
Normal file
@ -0,0 +1,80 @@
|
||||
///\file
|
||||
|
||||
/******************************************************************************
|
||||
The MIT License(MIT)
|
||||
|
||||
Embedded Template Library.
|
||||
https://github.com/ETLCPP/etl
|
||||
https://www.etlcpp.com
|
||||
|
||||
Copyright(c) 2017 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.
|
||||
******************************************************************************/
|
||||
|
||||
#ifndef __ETL_COMPARE__
|
||||
#define __ETL_COMPARE__
|
||||
|
||||
#include <functional>
|
||||
|
||||
#include "platform.h"
|
||||
#include "parameter_type.h"
|
||||
|
||||
//*****************************************************************************
|
||||
///\defgroup compare compare
|
||||
/// Comparisons only using less than operator
|
||||
///\ingroup utilities
|
||||
//*****************************************************************************
|
||||
|
||||
namespace etl
|
||||
{
|
||||
//***************************************************************************
|
||||
/// Defines <, <=, >, >= interms of <
|
||||
/// Default
|
||||
//***************************************************************************
|
||||
template <typename T, typename TLess = std::less<T> >
|
||||
struct compare
|
||||
{
|
||||
typedef typename etl::parameter_type<T>::type first_argument_type;
|
||||
typedef typename etl::parameter_type<T>::type second_argument_type;
|
||||
typedef bool result_type;
|
||||
|
||||
static result_type lt(first_argument_type lhs, second_argument_type rhs)
|
||||
{
|
||||
return TLess()(lhs, rhs);
|
||||
}
|
||||
|
||||
static result_type gt(first_argument_type lhs, second_argument_type rhs)
|
||||
{
|
||||
return TLess()(rhs, lhs);
|
||||
}
|
||||
|
||||
static result_type lte(first_argument_type lhs, second_argument_type rhs)
|
||||
{
|
||||
return !gt(lhs, rhs);
|
||||
}
|
||||
|
||||
static result_type gte(first_argument_type lhs, second_argument_type rhs)
|
||||
{
|
||||
return !lt(lhs, rhs);
|
||||
}
|
||||
};
|
||||
}
|
||||
|
||||
#endif
|
||||
118
test/test_compare.cpp
Normal file
118
test/test_compare.cpp
Normal file
@ -0,0 +1,118 @@
|
||||
/******************************************************************************
|
||||
The MIT License(MIT)
|
||||
|
||||
Embedded Template Library.
|
||||
https://github.com/ETLCPP/etl
|
||||
https://www.etlcpp.com
|
||||
|
||||
Copyright(c) 2017 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++.h"
|
||||
|
||||
#include "compare.h"
|
||||
|
||||
namespace
|
||||
{
|
||||
int a = 1;
|
||||
int b = 2;
|
||||
|
||||
typedef etl::compare<int> CompareInt;
|
||||
|
||||
struct Test
|
||||
{
|
||||
int a;
|
||||
int b;
|
||||
};
|
||||
|
||||
Test ta = { 1, 2 };
|
||||
Test tb = { 2, 3 };
|
||||
|
||||
//***********************************
|
||||
bool operator <(const Test& lhs, const Test& rhs)
|
||||
{
|
||||
return (lhs.a + lhs.b) < (rhs.a + rhs.b);
|
||||
}
|
||||
|
||||
//***********************************
|
||||
bool operator >(const Test& lhs, const Test& rhs)
|
||||
{
|
||||
return (lhs.a + lhs.b) > (rhs.a + rhs.b);
|
||||
}
|
||||
|
||||
//***********************************
|
||||
bool operator <=(const Test& lhs, const Test& rhs)
|
||||
{
|
||||
return (lhs.a + lhs.b) <= (rhs.a + rhs.b);
|
||||
}
|
||||
|
||||
//***********************************
|
||||
bool operator >=(const Test& lhs, const Test& rhs)
|
||||
{
|
||||
return (lhs.a + lhs.b) >= (rhs.a + rhs.b);
|
||||
}
|
||||
|
||||
//***********************************
|
||||
struct LessTest
|
||||
{
|
||||
bool operator()(const Test& lhs, const Test& rhs) const
|
||||
{
|
||||
return (lhs.a + lhs.b) < (rhs.a + rhs.b);
|
||||
}
|
||||
};
|
||||
|
||||
typedef etl::compare<Test, LessTest> CompareTest;
|
||||
|
||||
SUITE(test_compare)
|
||||
{
|
||||
//*************************************************************************
|
||||
TEST(test_lt)
|
||||
{
|
||||
CHECK_EQUAL(a < b, (CompareInt::lt(a, b)));
|
||||
CHECK_EQUAL(ta < tb, (CompareTest::lt(ta, tb)));
|
||||
}
|
||||
|
||||
//*************************************************************************
|
||||
TEST(test_lte)
|
||||
{
|
||||
CHECK_EQUAL(a <= b, (CompareInt::lte(a, b)));
|
||||
CHECK_EQUAL(a <= a, (CompareInt::lte(a, a)));
|
||||
CHECK_EQUAL(ta <= tb, (CompareTest::lte(ta, tb)));
|
||||
CHECK_EQUAL(ta <= ta, (CompareTest::lte(ta, ta)));
|
||||
}
|
||||
|
||||
//*************************************************************************
|
||||
TEST(test_gt)
|
||||
{
|
||||
CHECK_EQUAL(a > b, (CompareInt::gt(a, b)));
|
||||
CHECK_EQUAL(ta > tb, (CompareTest::gt(ta, tb)));
|
||||
}
|
||||
|
||||
//*************************************************************************
|
||||
TEST(test_gte)
|
||||
{
|
||||
CHECK_EQUAL(a >= b, (CompareInt::gte(a, b)));
|
||||
CHECK_EQUAL(a >= a, (CompareInt::gte(a, a)));
|
||||
CHECK_EQUAL(ta >= tb, (CompareTest::gte(ta, tb)));
|
||||
CHECK_EQUAL(ta >= ta, (CompareTest::gte(ta, ta)));
|
||||
}
|
||||
};
|
||||
}
|
||||
Loading…
x
Reference in New Issue
Block a user