Added is_integral and is_floating_point

const_fmt/stdlib.h

@@ -4,9 +4,9 @@
 
 /*
  *
- * Disclaimer: Probably very bad implementation of some features of the C++
- * Standard Library. Not meant as a full-on stdlib implementation, only for
- * usage in this project (Underlined by the fact, that in this case the
+ * Disclaimer: Very bad (partially at least) implementation of some features of
+ * the C++ Standard Library. Not meant as a full-on stdlib implementation, only
+ * for usage in this project (Underlined by the fact, that in this case the
  * namespace std is actually const_fmt::std)
  *
  */
@@ -36,25 +36,71 @@ using size_t = uint16_t;
  */
 
 
+struct true_type {
+    constexpr static bool value = true;
+};
+
+struct false_type {
+    constexpr static bool value = false;
+};
+
+
 // clang-format off
 
-        template<typename T>
-        struct remove_reference {
-            using type = T;
-        };
-        template<typename T>
-        struct remove_reference<T &> {
-            using type = T;
-        };
-        template<typename T>
-        struct remove_reference<T &&> {
-            using type = T;
-        };
+template <typename type_t> struct remove_cv                        { typedef type_t type; };
+template <typename type_t> struct remove_cv<const type_t>          { typedef type_t type; };
+template <typename type_t> struct remove_cv<volatile type_t>       { typedef type_t type; };
+template <typename type_t> struct remove_cv<const volatile type_t> { typedef type_t type; };
 
-        template<typename T>
-        using remove_reference_t = typename std::remove_reference<T>::type;
+template <typename type_t> struct remove_const                     { typedef type_t type; };
+template <typename type_t> struct remove_const<const type_t>       { typedef type_t type; };
+
+template <typename type_t> struct remove_volatile                  { typedef type_t type; };
+template <typename type_t> struct remove_volatile<volatile type_t> { typedef type_t type; };
+
+template <typename type_t> struct remove_reference                 { using type = type_t; };
+template <typename type_t> struct remove_reference<type_t &>       { using type = type_t; };
+template <typename type_t> struct remove_reference<type_t &&>      { using type = type_t; };
+
+template <typename type_t> using remove_reference_t = typename std::remove_reference<type_t>::type;
+template <typename type_t> using remove_cv_t        = typename std::remove_cv<type_t>::type;
+template <typename type_t> using remove_const_t     = typename std::remove_const<type_t>::type;
+template <typename type_t> using remove_volatile_t  = typename std::remove_volatile<type_t>::type;
+
+
+template <typename> struct is_integral_helper : public false_type {};
+
+template <> struct is_integral_helper<bool>               : public true_type {};
+template <> struct is_integral_helper<char>               : public true_type {};
+template <> struct is_integral_helper<signed char>        : public true_type {};
+template <> struct is_integral_helper<unsigned char>      : public true_type {};
+template <> struct is_integral_helper<wchar_t>            : public true_type {};
+template <> struct is_integral_helper<char16_t>           : public true_type {};
+template <> struct is_integral_helper<char32_t>           : public true_type {};
+template <> struct is_integral_helper<short>              : public true_type {};
+template <> struct is_integral_helper<unsigned short>     : public true_type {};
+template <> struct is_integral_helper<int>                : public true_type {};
+template <> struct is_integral_helper<unsigned int>       : public true_type {};
+template <> struct is_integral_helper<long>               : public true_type {};
+template <> struct is_integral_helper<unsigned long>      : public true_type {};
+template <> struct is_integral_helper<long long>          : public true_type {};
+template <> struct is_integral_helper<unsigned long long> : public true_type {};
+
+template <typename type_t>
+struct is_integral
+        : public is_integral_helper<remove_cv_t<type_t>> {};
+
+
+template <typename> struct is_floating_point_helper : public false_type {};
+
+template<> struct is_floating_point_helper<float>       : public true_type {};
+template<> struct is_floating_point_helper<double>      : public true_type {};
+template<> struct is_floating_point_helper<long double> : public true_type {};
+
+template<typename _Tp>
+struct is_floating_point
+        : public is_floating_point_helper<remove_cv_t<_Tp>>::type {};
 
-// clang-format on
 
 
 constexpr inline bool is_constant_evaluated() noexcept {
@@ -62,8 +108,6 @@ constexpr inline bool is_constant_evaluated() noexcept {
 }
 
 
-// clang-format off
-
 template <typename type_t> struct make_unsigned    { using type = type_t; };
 
 template <> struct make_unsigned<signed char>      { using type = char; };
@@ -82,17 +126,17 @@ template <> struct make_unsigned<signed long long> { using type = unsigned long
  */
 
 
-//template <typename _Tp>
-//concept integral = is_integral_v<_Tp>;
+// template <typename _Tp>
+// concept integral = is_integral_v<_Tp>;
 //
-//template <typename _Tp>
-//concept signed_integral = integral<_Tp> && is_signed_v<_Tp>;
+// template <typename _Tp>
+// concept signed_integral = integral<_Tp> && is_signed_v<_Tp>;
 //
-//template <typename _Tp>
-//concept unsigned_integral = integral<_Tp> && !signed_integral<_Tp>;
+// template <typename _Tp>
+// concept unsigned_integral = integral<_Tp> && !signed_integral<_Tp>;
 //
-//template <typename _Tp>
-//concept floating_point = is_floating_point_v<_Tp>;
+// template <typename _Tp>
+// concept floating_point = is_floating_point_v<_Tp>;
 
 
 /*