I suppose that the general problem is that we are using an nsRefPtr
lvalue in one side of the branch, and an nsRefPtr xvalue on the other
(as the nullptr is being cast to an nsRefPtr, which has to live in a
temporary making it an xvalue). This is reasonable in a situation where
we actually want
Michael Layzell wrote:
In summary, the nsRefPtr is copied into a temporary in its side of the
conditional. The nullptr is cast to a struct Foo*, which is constructed into a
nsRefPtr, which is bound to a temporary, and then moved around a bit between
temporaries. The resulting temporary xvalue
With regard to what #2 is doing, I threw the following into a file with
nsRefPtr, and got clang to dump the AST:
struct Foo {void AddRef() {} void Release() {}};
nsRefPtr bar;
void foo() {
Foo* x = true ? nullptr : bar;
}
`-FunctionDecl 0x103805750 line:943:6 foo 'void
(void)'
`-CompoundStmt
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