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Make iterators default constructible and assignable, by making...

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This commit is contained in:
Christoph Hertzberg
2021-04-09 17:03:28 +00:00
committed by Rasmus Munk Larsen
parent 2859db0220
commit d58678069c
3 changed files with 43 additions and 11 deletions
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30
test/stl_iterators.cpp
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@@ -7,9 +7,9 @@
// Public License v. 2.0. If a copy of the MPL was not distributed
// with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
#include "main.h"
#include <iterator>
#include <numeric>
#include "main.h"
template< class Iterator >
std::reverse_iterator<Iterator>
@@ -47,6 +47,18 @@ bool is_pointer_based_stl_iterator(const internal::pointer_based_stl_iterator<Xp
template<typename XprType>
bool is_generic_randaccess_stl_iterator(const internal::generic_randaccess_stl_iterator<XprType> &) { return true; }
template<typename Iter>
bool is_default_constructible_and_assignable(const Iter& it)
{
#if EIGEN_HAS_CXX11
VERIFY(std::is_default_constructible<Iter>::value);
VERIFY(std::is_nothrow_default_constructible<Iter>::value);
#endif
Iter it2;
it2 = it;
return (it==it2);
}
template<typename Xpr>
void check_begin_end_for_loop(Xpr xpr)
{
@@ -124,6 +136,22 @@ void test_stl_iterators(int rows=Rows, int cols=Cols)
Index i, j;
// Verify that iterators are default constructible (See bug #1900)
{
VERIFY( is_default_constructible_and_assignable(v.begin()));
VERIFY( is_default_constructible_and_assignable(v.end()));
VERIFY( is_default_constructible_and_assignable(cv.begin()));
VERIFY( is_default_constructible_and_assignable(cv.end()));
VERIFY( is_default_constructible_and_assignable(A.row(0).begin()));
VERIFY( is_default_constructible_and_assignable(A.row(0).end()));
VERIFY( is_default_constructible_and_assignable(cA.row(0).begin()));
VERIFY( is_default_constructible_and_assignable(cA.row(0).end()));
VERIFY( is_default_constructible_and_assignable(B.row(0).begin()));
VERIFY( is_default_constructible_and_assignable(B.row(0).end()));
}
// Check we got a fast pointer-based iterator when expected
{
VERIFY( is_pointer_based_stl_iterator(v.begin()) );