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libstdc++: Deprecate std::filesystem::u8path for C++20

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P0482R6 deprecated these functions for C++20. There was a ballot comment
on the C++23 CD saying to un-deprecate it, but LEWG just rejected that,
so let's add attributes to deprecate them.

libstdc++-v3/ChangeLog:

	* include/bits/fs_path.h (u8path): Add deprecated attribute.
	* testsuite/27_io/filesystem/path/construct/90281.cc: Add
	-Wno-deprecated-declarations for C++20 and later.
	* testsuite/27_io/filesystem/path/factory/u8path-char8_t.cc:
	Likewise.
	* testsuite/27_io/filesystem/path/factory/u8path.cc: Likewise.
	* testsuite/27_io/filesystem/path/native/string.cc: Likewise.
	* testsuite/27_io/filesystem/path/factory/u8path-depr.cc: New test.
This commit is contained in:
Jonathan Wakely
2023-01-18 14:27:55 +00:00
parent 26c68b8c31
commit 33237e93d5
6 changed files with 22 additions and 0 deletions
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2
libstdc++-v3/include/bits/fs_path.h
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@@ -808,6 +808,7 @@ namespace __detail
typename _Require = __detail::_Path2<_InputIterator>,
typename _CharT
= __detail::__value_type_is_char_or_char8_t<_InputIterator>>
_GLIBCXX20_DEPRECATED_SUGGEST("path(u8string(first, last))")
inline path
u8path(_InputIterator __first, _InputIterator __last)
{
@@ -830,6 +831,7 @@ namespace __detail
template<typename _Source,
typename _Require = __detail::_Path<_Source>,
typename _CharT = __detail::__value_type_is_char_or_char8_t<_Source>>
_GLIBCXX20_DEPRECATED_SUGGEST("path((const char8_t*)&*source)")
inline path
u8path(const _Source& __source)
{

1
libstdc++-v3/testsuite/27_io/filesystem/path/construct/90281.cc
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@@ -16,6 +16,7 @@
// <http://www.gnu.org/licenses/>.
// { dg-do run { target c++17 } }
// { dg-additional-options "-Wno-deprecated-declarations" { target c++20 } }
#include <filesystem>
#include <testsuite_hooks.h>

1
libstdc++-v3/testsuite/27_io/filesystem/path/factory/u8path-char8_t.cc
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@@ -17,6 +17,7 @@
// { dg-options "-fchar8_t -Wno-stringop-overread" }
// { dg-do run { target c++17 } }
// { dg-additional-options "-Wno-deprecated-declarations" { target c++20 } }
#include <filesystem>
#include <string_view>

16
libstdc++-v3/testsuite/27_io/filesystem/path/factory/u8path-depr.cc Normal file
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@@ -0,0 +1,16 @@
// { dg-options "-std=gnu++20" }
// { dg-do compile { target c++20 } }
#include <filesystem>
namespace fs = std::filesystem;
const char* s = "";
auto p1 = fs::u8path(s); // { dg-warning "deprecated" }
auto p2 = fs::u8path(s, s); // { dg-warning "deprecated" }
#if __cpp_lib_char8_t
const char8_t* u = u8"";
auto p3 = fs::u8path(u); // { dg-warning "deprecated" }
auto p4 = fs::u8path(u, u); // { dg-warning "deprecated" }
#endif

1
libstdc++-v3/testsuite/27_io/filesystem/path/factory/u8path.cc
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@@ -16,6 +16,7 @@
// <http://www.gnu.org/licenses/>.
// { dg-do run { target c++17 } }
// { dg-additional-options "-Wno-deprecated-declarations" { target c++20 } }
#include <filesystem>
#include <string_view>

1
libstdc++-v3/testsuite/27_io/filesystem/path/native/string.cc
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@@ -16,6 +16,7 @@
// <http://www.gnu.org/licenses/>.
// { dg-do run { target c++17 } }
// { dg-additional-options "-Wno-deprecated-declarations" { target c++20 } }
#include <filesystem>
#include <string>