https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100721
Bug ID: 100721
Summary: Warn when assigning to temporary
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: davidfromonline at gmail dot com
Target Milestone: ---
I would like for there to be a warning that warns for the following code:
```
struct s {};
inline void f() {
s() = s();
}
```
I know that for a given type, I can prevent this from compiling if I give `s`
an lvalue-refererence-qualified assignment operator, but that requires writing
two assignment operators and two (sometimes three) constructors to get the
behavior I get today from not typing anything, and I have to apply it to every
type. It would be much nicer if I could just turn on a warning for this.
The only valid use case is if your assignment operator has a side effect that
you want.
