https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95982
Bug ID: 95982
Summary: ICE with non-type template parameter that is itself
the instantiation of a template
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: ---
The code below causes an ICE saying "unexpected expression ‘<anonymous>’ of
kind template_parm_index".
OS: Ubuntu 18.04
g++ version: 10.1.0
Wandbox URL: https://wandbox.org/permlink/A9ImqBRe5vyZMFWC#
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#include <type_traits>
template< typename, template< auto > typename >
struct IsImplementationOf : std::false_type {};
template< template< auto > typename Template, auto Arg >
struct IsImplementationOf< Template< Arg >, Template > : std::true_type {};
template< typename T >
struct X {
constexpr X( T ) {}
};
template< X > struct Y {};
int main()
{
static_assert( IsImplementationOf< Y< X(0) >, Y > );
return 0;
}
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