https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120025
--- Comment #2 from Stas Sergeev <stsp at users dot sourceforge.net> ---
(In reply to Andrew Pinski from comment #1)
> I am not even sure what assignable temporaries is. Do you have an example?
```
#include <iostream>
struct A {
int a;
~A() { std::cout << "a=" << a << std::endl; }
};
struct B {
A foo() { return A(); }
};
int main()
{
B b;
b.foo().a = 5;
return 0;
}
```
$ clang++ astmp.cpp
astmp.cpp:15:15: error: expression is not assignable
15 | b.foo().a = 5;
| ~~~~~~~~~ ^
1 error generated.
$ g++ astmp.cpp -fpermissive
astmp.cpp: In function ‘int main()’:
astmp.cpp:15:13: warning: using rvalue as lvalue [-fpermissive]
15 | b.foo().a = 5;
| ~~~~~~~~^
$ ./a.out
a=5
