https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102994
Bug ID: 102994
Summary: std::atomic<ptr>::wait is not marked const
Product: gcc
Version: 11.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: gcc_bugzilla at axeitado dot com
Target Milestone: ---
This code fails to compile because the `wait' member function is not marked
`const' in the specialization of std::atomic for pointers:
#include <atomic>
void foo(const std::atomic<char*> &a, char *p) {
a.wait(p);
}
g++ --std=c++20
<source>: In function 'void foo(const std::atomic<char*>&, char*)':
<source>:4:11: error: passing 'const std::atomic<char*>' as 'this' argument
discards qualifiers [-fpermissive]
4 | a.wait(p);
| ~~~~~~^~~
In file included from <source>:1:
/opt/compiler-explorer/gcc-trunk-20211028/include/c++/12.0.0/atomic:651:5:
note: in call to 'void
std::atomic<_Tp*>::wait(std::atomic<_Tp*>::__pointer_type, std::memory_order)
[with _Tp = char; std::atomic<_Tp*>::__pointer_type = char*]'
651 | wait(__pointer_type __old, memory_order __m = memory_order_seq_cst)
noexcept
| ^~~~
Compiler returned: 1
