[llvm] [clang] [libcxx] [clang-tools-extra] [libc++][span] P2821R5: span.at() (PR #74994)

@@ -343,6 +347,15 @@ public: return __data_[__idx]; } +# if _LIBCPP_STD_VER >= 26 +_LIBCPP_HIDE_FROM_ABI constexpr reference at(size_type __idx) const { + if (__idx >= size()) { +__throw_out_of_range(); + } + return *(data() + __idx); --

[llvm] [clang] [libcxx] [clang-tools-extra] [libc++][span] P2821R5: span.at() (PR #74994)

@@ -41,7 +41,6 @@ void testRuntimeSpan(Span sp, std::size_t idx) assert(r1 == r2); } -struct A{}; H-G-Hristov wrote: Yes, I can restore that change. Initially I was looking into reusing op_idx tests and I noticed that this declaration is unused. https:/