xtd::textual_literal< type_t > Struct Template Reference

Definition

template<class type_t>
struct xtd::textual_literal< type_t >

Represents the textual literal concept.

Definition

template<class type_t>
concept xtd::textual_literal = std::same_as<type_t, const xtd::char_*> || std::same_as<type_t, const xtd::wchar*> || std::same_as<type_t, const xtd::char8*> || std::same_as<type_t, const xtd::char16*> || std::same_as<type_t, const xtd::char32*>;

Header

#include <xtd/textual_literal>

Namespace

xtd

Library

xtd.core

Examples

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

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

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

• xtd.core/include/xtd/textual_literal_.hpp