On Mon, Aug 04, 2025 at 12:00:32PM +0200, Jonathan Wakely wrote:
> using std::operator""d;
> using std::operator""h;
> using std::operator""min;
> using std::operator""ms;
> using std::operator""ns;
> using std::operator""sv;
> using std::operator""us;
> using std::operator""y;
>
> Shouldn't these be in std::chrono? Or the inline namespace chrono_literals
Yeah, guess the plugin should be modified to silently look through inline
namespaces only when they have names starting with underscore (e.g. __cxx11)
but not when they have non-uglified names (e.g. the
std::literals::chrono_literals:: cases).
> using std::ranges::iter_move;
> using std::ranges::iter_swap;
>
> These should be exported - I'm surprised we're missing them.
>
> using std::regex_constants::awk;
>
> All these constants should be exported.
>
> I think all the other names have been removed from the standard and are not
> in C++20.
I went through it all now, using cppreference as a quick check for stuff
removed in C++17/C++20 and for everything added verified it is in
corresponding eel.is/c++-draft/*.syn etc. and looked it up in the libstdc++
headers for guarding macros.
After all the additions I've compiled std.cc with -std=c++20, -std=c++23 and
-std=c++26, the first one revealed std::ranges::shift_{left,right} emitted an
error in that case, the patch fixes that too.
Ok for trunk?
2025-08-04 Jakub Jelinek <ja...@redhat.com>
PR libstdc++/121373
* src/c++23/std.cc.in (std::ranges::shift_left,
std::ranges::shift_right): Only export for C++23 and later.
(std::ranges::fold_left_first_with_iter_result,
std::ranges::fold_left_with_iter_result): Export.
(std::byteswap): Export for C++23 and later.
(std::ranges::iter_move, std::ranges::iter_swap): Export.
(std::projected_value_t): Export for C++26 and later.
(std::out_ptr_t, std::inout_ptr_t): Export.
(std::ranges::iota_result): Export.
(std::regex_constants): Export a lot of constants.
(std::is_scoped_enum, std::is_scoped_enum_v): Export.
--- libstdc++-v3/src/c++23/std.cc.in.jj 2025-08-02 20:50:48.301748803 +0200
+++ libstdc++-v3/src/c++23/std.cc.in 2025-08-04 12:13:30.778385590 +0200
@@ -277,15 +277,14 @@ export namespace std
using std::ranges::shuffle;
}
using std::shift_left;
- namespace ranges
- {
- using std::ranges::shift_left;
- }
using std::shift_right;
+#if __cpp_lib_shift >= 202202L // >= C++23
namespace ranges
{
+ using std::ranges::shift_left;
using std::ranges::shift_right;
}
+#endif
using std::sort;
namespace ranges
{
@@ -500,7 +499,9 @@ export namespace std
using ranges::fold_left;
using ranges::fold_left_first;
using ranges::fold_left_first_with_iter;
+ using ranges::fold_left_first_with_iter_result;
using ranges::fold_left_with_iter;
+ using ranges::fold_left_with_iter_result;
using ranges::fold_right;
using ranges::fold_right_last;
using ranges::in_value_result;
@@ -672,6 +673,9 @@ export namespace std
using std::popcount;
using std::rotl;
using std::rotr;
+#if __cpp_lib_byteswap // >= C++23
+ using std::byteswap;
+#endif
}
// 22.9 <bitset>
@@ -1693,6 +1697,8 @@ export namespace std
{
using std::ranges::advance;
using std::ranges::distance;
+ using std::ranges::iter_move;
+ using std::ranges::iter_swap;
using std::ranges::next;
using std::ranges::prev;
}
@@ -1747,6 +1753,9 @@ export namespace std
using std::make_const_iterator;
using std::make_const_sentinel;
#endif
+#if __glibcxx_algorithm_default_value_type // >= C++26
+ using std::projected_value_t;
+#endif
}
// <latch>
@@ -1973,6 +1982,8 @@ export namespace std
#if __cpp_lib_out_ptr
using std::out_ptr;
using std::inout_ptr;
+ using std::out_ptr_t;
+ using std::inout_ptr_t;
#endif
#if __cpp_lib_indirect
using std::indirect;
@@ -2101,7 +2112,11 @@ export namespace std
using std::lcm;
using std::midpoint;
#if __cpp_lib_ranges_iota
- namespace ranges { using ranges::iota; }
+ namespace ranges
+ {
+ using ranges::iota;
+ using ranges::iota_result;
+ }
#endif
#if __cpp_lib_saturation_arithmetic
using std::add_sat;
@@ -2512,6 +2527,43 @@ export namespace std
using std::regex_constants::operator|;
using std::regex_constants::operator|=;
using std::regex_constants::operator~;
+ using std::regex_constants::awk;
+ using std::regex_constants::basic;
+ using std::regex_constants::collate;
+ using std::regex_constants::ECMAScript;
+ using std::regex_constants::egrep;
+ using std::regex_constants::extended;
+ using std::regex_constants::grep;
+ using std::regex_constants::icase;
+ using std::regex_constants::multiline;
+ using std::regex_constants::nosubs;
+ using std::regex_constants::optimize;
+ using std::regex_constants::format_default;
+ using std::regex_constants::format_first_only;
+ using std::regex_constants::format_no_copy;
+ using std::regex_constants::format_sed;
+ using std::regex_constants::match_any;
+ using std::regex_constants::match_continuous;
+ using std::regex_constants::match_default;
+ using std::regex_constants::match_not_bol;
+ using std::regex_constants::match_not_bow;
+ using std::regex_constants::match_not_eol;
+ using std::regex_constants::match_not_eow;
+ using std::regex_constants::match_not_null;
+ using std::regex_constants::match_prev_avail;
+ using std::regex_constants::error_backref;
+ using std::regex_constants::error_badbrace;
+ using std::regex_constants::error_badrepeat;
+ using std::regex_constants::error_brace;
+ using std::regex_constants::error_brack;
+ using std::regex_constants::error_collate;
+ using std::regex_constants::error_complexity;
+ using std::regex_constants::error_ctype;
+ using std::regex_constants::error_escape;
+ using std::regex_constants::error_paren;
+ using std::regex_constants::error_range;
+ using std::regex_constants::error_space;
+ using std::regex_constants::error_stack;
}
using std::basic_regex;
using std::csub_match;
@@ -3153,6 +3205,10 @@ export namespace std
using std::is_pointer_interconvertible_base_of_v;
using std::is_pointer_interconvertible_with_class;
#endif
+#if __cpp_lib_is_scoped_enum
+ using std::is_scoped_enum;
+ using std::is_scoped_enum_v;
+#endif
}
// <typeindex>
Jakub
