2 class X // Indentation has been done so to see the similarities.
6 X(X& x) {x.i=7;} // { dg-message "note" } Both functions modify the
7 void bar(X& x) {x.i=7;} // { dg-message "note" } reference parameter x.
11 X foo() { X x; return x; }
15 X x(foo()); // { dg-error "rvalue" } Compiler doesn't warn about temporary reference.
16 x.bar(foo()); // { dg-error "rvalue" } The same mistake is warned about in this case.