https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97712
Bug ID: 97712
Summary: Attribute nodiscard in virtual methods is ignored
Product: gcc
Version: 11.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: pacoarjonilla at yahoo dot es
Target Milestone: ---
The standard attribute [[nodiscard]] is ignored if the function is virtual.
Versions GNU C++ trunk and GNU C++ 10.2 fails to issue a warning on the
following snippet:
>>>>>>>>>>>
struct B {
[[nodiscard]] virtual int f() = 0;
};
struct D : public B {
[[nodiscard]] int f() override {return 1;}
};
int main() {
B * b = new D;
b->f(); // GNU C++ does not warn about discarded value
}
<<<<<<<<<<<<<
Clang does issue a warning appropriately.
