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[Bug c++/40315] template instantiation fails when using const typename
- From: "redi at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 26 Aug 2009 14:43:12 -0000
- Subject: [Bug c++/40315] template instantiation fails when using const typename
- References: <bug-40315-17781@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #2 from redi at gcc dot gnu dot org 2009-08-26 14:43 -------
IIUC, the top-level const qualifier on "const typename Foo<D>::double3" in the
primary template applies to the type, which is not known during phase 1
At instantiation time, double3 is known to be an array type, so decays to a
pointer, and the parameter type becomes "const double*" _not_ "double* const"
So the explicit instantiation creates a type which does not match the primary
template, so it cannot be a specialisation of it.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40315