https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88210
Bug ID: 88210
Summary: Add fix-it hint for explicit template instantiations
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: diagnostic
Severity: enhancement
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: redi at gcc dot gnu.org
CC: dmalcolm at gcc dot gnu.org
Target Milestone: ---
namespace x {
template<typename T> struct blah { };
}
extern template class blah<int>;
template class blah<int>;
This produces:
expl.cc:5:23: error: 'blah' is not a class template
5 | extern template class blah<int>;
| ^~~~
expl.cc:5:23: error: explicit instantiation of non-template type 'blah'
expl.cc:7:16: error: 'blah' is not a class template
7 | template class blah<int>;
| ^~~~
expl.cc:7:16: error: explicit instantiation of non-template type 'blah'
It would be helpful to suggest x::blah instead of just saying "is not a class
template".
It took me a while to realise the problem here, because I've got used to GCC
now saying "did you mean x::blah?" when that's what the problem is.
