https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85105
Bug ID: 85105
Summary: missing -Wignored-qualifiers with const decltype
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: msebor at gcc dot gnu.org
Target Milestone: ---
Both const qualifiers in the program below are ignored but GCC only issues
-Wignored-qualifiers for the first. A warning for the second instance would be
even more useful since the author may be assuming that r2 declares a const
reference to int when it in fact declares a non-const reference.
$ cat u.C && gcc -S -Wall -Wextra -Wpedantic -Wuseless-cast u.C
const int f (); // -Wignored-qualifiers (good)
extern int &r1;
const decltype (r1) r2 = r1; // missing -Wignored-qualifiers
u.C:1:1: warning: type qualifiers ignored on function return type
[-Wignored-qualifiers]
const int f (); // -Wignored-qualifiers (good)
^~~~~
