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Added get() non-member template functions.

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This commit is contained in:
jwellbelove 2014-12-09 15:04:53 +00:00
parent e74c826d1f
commit 824eb89719
2 changed files with 44 additions and 0 deletions
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31
array.h
View File

@ -37,6 +37,7 @@ SOFTWARE.
#include "exception.h"
#include "type_traits.h"
#include "parameter_type.h"
#include "static_assert.h"
#ifndef ETL_THROW_EXCEPTIONS
#include "error_handler.h"
@ -468,6 +469,36 @@ namespace etl
rhs.cbegin(),
rhs.cend());
}
//*************************************************************************
/// Gets a reference to an element in the array.
///\tparam I The index.
///\tparam T The type.
///\tparam N The array size.
///\param a The array.
///\return A reference to the element
//*************************************************************************
template <std::size_t I, typename T, std::size_t N>
inline T& get(array<T, N>& a)
{
STATIC_ASSERT(I < N, "Index out of bounds");
return a[I];
}
//*************************************************************************
/// Gets a const reference to an element in the array.
///\tparam I The index.
///\tparam T The type.
///\tparam N The array size.
///\param a The array.
///\return A const reference to the element
//*************************************************************************
template <std::size_t I, typename T, std::size_t N>
inline const T& get(const array<T, N>& a)
{
STATIC_ASSERT(I < N, "Index out of bounds");
return a[I];
}
}
#endif

13
test/test_array.cpp
View File

@ -333,6 +333,19 @@ namespace
CHECK(std::equal(swap_data.begin(), swap_data.end(), data2.begin()));
}
//*************************************************************************
TEST(test_get)
{
Data data1 = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };
const Data data2 = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };
CHECK_EQUAL(data1[3], etl::get<3>(data1));
CHECK_EQUAL(data2[3], etl::get<3>(data2));
// The following line should fail with a compile error.
//int i = etl::get<11>(data2);
}
//*************************************************************************
TEST(test_equal)
{