https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111948
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Ever confirmed|0 |1
Last reconfirmed| |2023-10-24
--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
This patch makes the testcase compile, but I still think it's a compiler bug
not a library bug:
--- a/libstdc++-v3/include/bits/ranges_util.h
+++ b/libstdc++-v3/include/bits/ranges_util.h
@@ -267,13 +267,21 @@ namespace ranges
using __size_type
= __detail::__make_unsigned_like_t<iter_difference_t<_It>>;
- template<typename, bool = _S_store_size>
+ template<typename _Tp, bool = _S_store_size>
struct _Size
- { };
+ {
+ [[__gnu__::__always_inline__]]
+ constexpr _Size(_Tp) { }
+ };
template<typename _Tp>
struct _Size<_Tp, true>
- { _Tp _M_size; };
+ {
+ [[__gnu__::__always_inline__]]
+ constexpr _Size(_Tp __s) : _M_size(__s) { }
+
+ _Tp _M_size;
+ };
[[no_unique_address]] _Size<__size_type> _M_size = {};
@@ -294,11 +302,8 @@ namespace ranges
noexcept(is_nothrow_constructible_v<_It, decltype(__i)>
&& is_nothrow_constructible_v<_Sent, _Sent&>)
requires (_Kind == subrange_kind::sized)
- : _M_begin(std::move(__i)), _M_end(__s)
- {
- if constexpr (_S_store_size)
- _M_size._M_size = __n;
- }
+ : _M_begin(std::move(__i)), _M_end(__s), _M_size(__n)
+ { }
template<__detail::__different_from<subrange> _Rng>
requires borrowed_range<_Rng>
