The following code warns on guard2 and guard3 (but not guard) despite all 3 variable having side effects on destruction.
This feels inconsistent and surprising.
GCC emits no warning in any of these cases.
struct RAIIWrapper {
RAIIWrapper();
~RAIIWrapper();
};
void foo() {
auto const guard = RAIIWrapper();
auto const& guard2 = RAIIWrapper(); //unused variable 'guard2'
auto && guard3 = RAIIWrapper(); //unused variable 'guard3'
}
https://godbolt.org/z/zr7dsevoc
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