xtd::numeric< type_t > Struct Template Reference

Definition

template<typename type_t>
struct xtd::numeric< type_t >

Represents the numeric concept.

Definition

template<typename type_t>
concept xtd::numeric = xtd::integer<type_t> || xtd::real<type_t>;

Header

#include <xtd/numeric>

Namespace

xtd

Library

xtd.core

Examples

The following code shows how to use xtd::numeric concept

#include <xtd/xtd>
 
auto print_is_numeric(auto value) noexcept {
  println("{} ({}) {} numeric", value, type_of(value), numeric<decltype(value)> ? "is" : "is not");
}
 
auto main() -> int {
  print_is_numeric(42_s8);
  print_is_numeric(42_s16);
  print_is_numeric(42_s32);
  print_is_numeric(42_s64);
  print_is_numeric(42_u8);
  print_is_numeric(42_u16);
  print_is_numeric(42_u32);
  print_is_numeric(42_u64);
  print_is_numeric(42_z);
  print_is_numeric(42.84f);
  print_is_numeric(42.84);
  print_is_numeric(42.84l);
  print_is_numeric('a');
  print_is_numeric(true);
  print_is_numeric("string"_s);
  print_is_numeric("string");
  print_is_numeric(1_h + 12_min + 24_s + 48_ms);
  print_is_numeric(day_of_week::wednesday);
}
 
// This code produces the following output :
//
// 42 (signed char) is numeric
// 42 (short) is numeric
// 42 (int) is numeric
// 42 (long long) is numeric
// 42 (unsigned char) is numeric
// 42 (unsigned short) is numeric
// 42 (unsigned int) is numeric
// 42 (unsigned long long) is numeric
// 42 (unsigned long) is numeric
// 42.84 (float) is numeric
// 42.84 (double) is numeric
// 42.84 (long double) is numeric
// true (bool) is not numeric
// string (xtd::basic_string<char, std::char_traits<char>, std::allocator<char>>) is not numeric
// string (char const*) is not numeric
// 01:12:24.0480000 (xtd::time_span) is not numeric
// wednesday (xtd::day_of_week) is not numeric

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The documentation for this struct was generated from the following file:

• xtd.core/include/xtd/numeric_.hpp