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// PR c++/90100
// { dg-do compile { target c++2a } }
template<typename T>
inline constexpr bool is_nontype_list = false;
template<template<auto...> typename T, auto... NonTypes>
inline constexpr bool is_nontype_list<T<NonTypes...>> = true;
// works
template<auto...>
struct A {};
static_assert(is_nontype_list<A<1, 2, 3>>);
// fails
struct X {
int v;
};
static_assert(is_nontype_list<A<X{1}, X{2}, X{3}>>);
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