module;

#include <cstddef>
#include <array>
#include <string>
#include <initializer_list>

export module utils;

export constexpr bool isletter(char ch) {
	return (ch >= 'a' && ch <= 'z') || (ch >= 'A' && ch <= 'Z');
}


export template<std::size_t N>
constexpr bool is_valid_character_from_set(std::array<std::string, N> haystack, char needle) {
	for(auto& a : haystack) {
		for(auto& c : a) {
			if (c == needle) {
				return true;
			}
		}
	}
	return false;
}