Add support for different character widths

to_string.hpp

@@ -15,17 +15,17 @@
  * @tparam N Number to convert
  * @tparam base Desired base, can be from 2 to 36
  */
-template<auto N, unsigned int base,
+template<auto N, unsigned int base, typename char_type,
     std::enable_if_t<std::is_integral_v<decltype(N)>, int> = 0,
     std::enable_if_t<(base > 1 && base < 37), int> = 0>
 struct to_string_t {
     // The lambda calculates what the string length of N will be, so that `buf`
     // fits to the number perfectly.
-    char buf[([] {
-                  unsigned int len = N > 0 ? 1 : 2;
-                  for (auto n = N < 0 ? -N : N; n; len++, n /= base);
-                  return len;
-             }())] = {};
+    char_type buf[([] {
+                       unsigned int len = N > 0 ? 1 : 2;
+                       for (auto n = N < 0 ? -N : N; n; len++, n /= base);
+                       return len;
+                   }())] = {};
 
     /**
      * Constructs the object, filling `buf` with the string representation of N.
@@ -46,14 +46,14 @@ struct to_string_t {
     /**
      * Allows implicit conversion of this object to a `char *`.
      */
-    constexpr operator char *() {
+    constexpr operator char_type *() {
         return buf;
     }
     
     /**
      * Allows implicit conversion of this object to a `const char *`.
      */
-    constexpr operator const char *() const {
+    constexpr operator const char_type *() const {
         return buf;
     }
 };
@@ -61,7 +61,7 @@ struct to_string_t {
 /**
  * Simplifies use of `to_string_t` from `to_string_t<N>()` to `to_string<N>`.
  */
-template<auto N, unsigned int base = 10>
-constexpr to_string_t<N, base> to_string;
+template<auto N, unsigned int base = 10, typename char_type = char>
+constexpr to_string_t<N, base, char_type> to_string;
  
 #endif // TCSULLIVAN_TO_STRING_HPP_