libstdc++: Reduce header dependencies in <span>

* include/std/span: Do not include <tuple> and <utility>.
	(tuple_size, tuple_element): Declare.

From-SVN: r279171
This commit is contained in:
Jonathan Wakely 2019-12-10 16:15:55 +00:00 committed by Jonathan Wakely
parent 990a09e486
commit b65bdd27fd
2 changed files with 6 additions and 2 deletions

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@ -1,5 +1,8 @@
2019-12-10 Jonathan Wakely <jwakely@redhat.com>
* include/std/span: Do not include <tuple> and <utility>.
(tuple_size, tuple_element): Declare.
* include/bits/iterator_concepts.h (indirect_result_t): Do not apply
iter_reference_t to parameter pack.
* testsuite/24_iterators/indirect_callable/projected.cc: New test.

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@ -39,8 +39,6 @@
#if __cplusplus > 201703L
#include <type_traits>
#include <tuple>
#include <utility>
#include <array>
#include <bits/stl_iterator.h>
#include <bits/range_access.h>
@ -451,6 +449,9 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
return __sp[_Index];
}
template<typename _Tp> struct tuple_size;
template<size_t __i, typename _Tp> struct tuple_element;
template<typename _Type, size_t _Extent>
struct tuple_size<span<_Type, _Extent>>
: public integral_constant<size_t, _Extent>