https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95986
Bug ID: 95986
Summary: Partial specialization of class template is not found
when class template has NTTP of class type
Product: gcc
Version: 10.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: bence.kodaj at gmail dot com
Target Milestone: ---
In the code below I would expect the static assertion __not__ to fail, but it
does.
OS: Ubuntu 18.04.
Godbolt: https://godbolt.org/z/absUyx
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#include <type_traits>
template< typename, template< auto... > typename >
struct IsInstantationOf : std::false_type {};
template< template< auto... > typename Template, auto... Arg >
struct IsInstantationOf< Template< Arg... >, Template > : std::true_type {};
template< std::size_t N >
struct StrLiteral {
constexpr StrLiteral( const char ( & )[ N ] ) {}
};
template< StrLiteral >
struct Template {};
int main()
{
const auto a = StrLiteral( "a" );
static_assert( IsInstantationOf< Template< a >, Template >::value );
return 0;
}
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