https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94610
Bug ID: 94610
Summary: 'invalid use of incomplete type' error which show an
alias, but without the real type
Product: gcc
Version: 9.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: jonathan.poelen at gmail dot com
Target Milestone: ---
class X;
template<class>
using something = X;
something<int> a;
something<int> b = 1;
$ g++ test.cpp
test.cpp:6:16: error: aggregate ‘something<int> a’ has incomplete type and
cannot be defined
6 | something<int> a;
| ^
test.cpp:7:16: error: variable ‘something<int> b’ has initializer but
incomplete type
7 | something<int> b = 1;
| ^
The real type of something<int> is missing. Expected:
error: aggregate ‘something<int> a’ {aka ‘X’} has incomplete type and
cannot be defined
and
error: variable ‘something<int> b’ {aka ‘X’} has initializer but incomplete
type
