The included example compiles (and runs) in GCC 5.1, but ICC fails with the following internal error:
assertion failed at: "shared/cfe/edgcpfe/il.c", line 18463
#include "stdafx.h"
#include <utility>
#include <array>
#include <iostream>
template <size_t... I, size_t... J>
constexpr std::array<char, sizeof...(I) + sizeof...(J) + 1>
constcat_impl(
const char (&s)[sizeof...(I) + 1],
const char (&t)[sizeof...(J) + 1],
std::index_sequence<I...>,
std::index_sequence<J...>) {
return{ s..., t..., '\0' };
}
template <size_t M, size_t N,
typename I = std::make_index_sequence<M - 1>,
typename J = std::make_index_sequence<N - 1>>
constexpr std::array<char, M + N - 1>
constcat(const char (&s), const char (&t)) {
return constcat_impl(s, t, I(), J());
}
int main()
{
auto a = constcat("Hello, ", "world!");
std::cout << a.data() << std::endl;
return 0;
}
