https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93503
Bug ID: 93503
Summary: Duplicated warning on pure virtual implicit template
in C++2a
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: arthur.j.odwyer at gmail dot com
Target Milestone: ---
// https://godbolt.org/z/FCqkWh
template<class> concept A = true;
struct S {
virtual int foo(A auto) = 0;
};
g++ test.cc -std=c++2a
test.cc:3:31: error: templates may not be 'virtual'
3 | virtual int foo(A auto) = 0;
| ^
test.cc:3:17: error: implicit templates may not be 'virtual'
3 | virtual int foo(A auto) = 0;
| ^~~
It is just a tiny bit suboptimal that the same warning appears twice.
The issue seems to be something about the "=0"; a virtual function with
";" or "{}" or "=delete" does not give the same duplicated warning.
