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// { dg-do compile { target c++20 } }
// { dg-options "-g" }
typedef __SIZE_TYPE__ size_t;
namespace std
{
template <typename T, T... I>
struct integer_sequence
{
typedef T value_type;
static constexpr size_t size () noexcept { return sizeof...(I); }
};
template <typename T, T N>
using make_integer_sequence = integer_sequence<T, __integer_pack (N)...>;
template <size_t... I>
using index_sequence = integer_sequence<size_t, I...>;
template <size_t N>
using make_index_sequence = make_integer_sequence<size_t, N>;
}
template <typename T, size_t N> struct S
{
T content[N];
using char_type = T;
template <size_t... I>
constexpr S (const T (&input)[N], std::index_sequence<I...>) noexcept : content{input[I]...} { }
constexpr S (const T (&input)[N]) noexcept : S (input, std::make_index_sequence<N> ()) { }
constexpr size_t size () const noexcept
{
if (content[N - 1] == '\0')
return N - 1;
else
return N;
}
constexpr T operator[] (size_t i) const noexcept
{
return content[i];
}
constexpr const T *begin () const noexcept
{
return content;
}
constexpr const T *end () const noexcept
{
return content + size ();
}
};
template <typename T, size_t N> S (const T (&)[N]) -> S<T, N>;
template <S S>
struct F
{
};
auto
foo ()
{
F<"test"> f;
}
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