http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59284
Bug ID: 59284
Summary: missing diagnostic on incomplete type at the point of
template definition
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: vanyacpp at gmail dot com
According to [temp.res]p8 this code is invalid, but gcc don't show error on it:
struct x;
template <typename T>
void f()
{
x x;
}
"If a type used in a non-dependent name is incomplete at the point at which a
template is defined but is complete at the point at which an instantiation is
done, and if the completeness of that type affects whether or not the program
is well-formed or affects the semantics of the program, the program is
ill-formed; no diagnostic is required."
clang gives error:
19.cpp:7:7: error: variable has incomplete type 'x'
x x;
^
19.cpp:2:8: note: forward declaration of 'x'
struct x;
^
1 error generated.
