http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57854
Bug ID: 57854
Summary: Would like to have a warning for virtual overrides
without C++11 "override" keyword
Product: gcc
Version: 4.8.1
Status: UNCONFIRMED
Severity: enhancement
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: thiago at kde dot org
I would like a new (optional) warning that would point out every C++ virtual
override that is done without the C++11 keyword that indicates an override. By
necessity, this warning would only be permitted in C++11 mode.
The keyword was added so that developers would let the compiler know when an
override is intended. However, the [[base_check]] attribute was dropped from
C++11 prior to standardisation, so there's no way (currently) to ask the
compiler to let us know which classes are doing overrides without the keyword.
This warning should be printed in the otherwise perfectly correct code:
struct Base {
virtual void v();
};
struct Derived: Base {
virtual void v(); // warning happens here
};
This warning should not be in -Wall. It should be in -Weffc++. I'll leave it up
to you whether it's in -Wextra.
