diff --git a/gcc/testsuite/g++.dg/warn/Wdangling-reference17.C b/gcc/testsuite/g++.dg/warn/Wdangling-reference17.C new file mode 100644 index 00000000000..223698422c2 --- /dev/null +++ b/gcc/testsuite/g++.dg/warn/Wdangling-reference17.C @@ -0,0 +1,15 @@ +// PR c++/111410 +// { dg-do compile { target c++20 } } +// { dg-options "-Wdangling-reference" } + +#include +#include + +int main() +{ + std::vector v{1, 2, 3, 4, 5}; + for (auto i : std::span{v} | std::views::take(1)) + { + (void) i; + } +} diff --git a/libstdc++-v3/include/std/ranges b/libstdc++-v3/include/std/ranges index 7ef835f486a..f2413badd9c 100644 --- a/libstdc++-v3/include/std/ranges +++ b/libstdc++-v3/include/std/ranges @@ -942,6 +942,8 @@ namespace views::__adaptor concept __is_range_adaptor_closure = requires (_Tp __t) { __adaptor::__is_range_adaptor_closure_fn(__t, __t); }; +#pragma GCC diagnostic push +#pragma GCC diagnostic ignored "-Wdangling-reference" // range | adaptor is equivalent to adaptor(range). template requires __is_range_adaptor_closure<_Self> @@ -961,6 +963,7 @@ namespace views::__adaptor return _Pipe, decay_t<_Rhs>>{std::forward<_Lhs>(__lhs), std::forward<_Rhs>(__rhs)}; } +#pragma GCC diagnostic pop // The base class of every range adaptor non-closure. //