Tested x86_64-linux. Pushed to trunk. gcc-12 backport needed too. -- >8 --
libstdc++-v3/ChangeLog: PR libstdc++/109165 * include/std/coroutine (hash<>::operator()): Add const. * testsuite/18_support/coroutines/hash.cc: New test. --- libstdc++-v3/include/std/coroutine | 2 +- .../testsuite/18_support/coroutines/hash.cc | 22 +++++++++++++++++++ 2 files changed, 23 insertions(+), 1 deletion(-) create mode 100644 libstdc++-v3/testsuite/18_support/coroutines/hash.cc diff --git a/libstdc++-v3/include/std/coroutine b/libstdc++-v3/include/std/coroutine index f6e65566f10..b0ca18949db 100644 --- a/libstdc++-v3/include/std/coroutine +++ b/libstdc++-v3/include/std/coroutine @@ -345,7 +345,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION struct hash<coroutine_handle<_Promise>> { size_t - operator()(const coroutine_handle<_Promise>& __h) noexcept + operator()(const coroutine_handle<_Promise>& __h) const noexcept { return reinterpret_cast<size_t>(__h.address()); } diff --git a/libstdc++-v3/testsuite/18_support/coroutines/hash.cc b/libstdc++-v3/testsuite/18_support/coroutines/hash.cc new file mode 100644 index 00000000000..68e5e640477 --- /dev/null +++ b/libstdc++-v3/testsuite/18_support/coroutines/hash.cc @@ -0,0 +1,22 @@ +// { dg-options "-std=gnu++2a" } +// { dg-do run { target c++2a } } + +#include <coroutine> +#include <testsuite_hooks.h> + +void +test01() +{ + std::hash<std::noop_coroutine_handle> h; + std::size_t v = h(std::noop_coroutine()); + + const auto& ch = h; + std::size_t v2 = h(std::noop_coroutine()); // PR libstdc++/109165 + + VERIFY( v2 == v ); +} + +int main() +{ + test01(); +} -- 2.39.2