static_for.hpp

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#pragma once
 
#include <stdint.h>
#include <utility>
#include <initializer_list>
 
namespace detail {
 
template <typename F, uint8_t... Is>
static inline __attribute__((always_inline)) void unroll_impl(F&& f, std::integer_sequence<uint8_t, Is...>) {
    // C++14 expansion using an initializer list to evaluate f(Is) in order
    (void)std::initializer_list<uint8_t>{ (f(std::integral_constant<uint8_t, Is>{}), (uint8_t)0)... };
}
 
} // detail
 
template <uint8_t N, typename F>
static inline __attribute__((always_inline)) void static_for(F&& f) {
    detail::unroll_impl(std::forward<F>(f), std::make_integer_sequence<uint8_t, N>{});
}