std::isprint(std::locale) (3) - Linux Manuals

std::isprint(std::locale): std::isprint(std::locale)


std::isprint(std::locale) - std::isprint(std::locale)


Defined in header <locale>
template< class charT >
bool isprint( charT ch, const locale& loc );

Checks if the given character classified as a printable character (including space) by the given locale's std::ctype facet.


ch - character
loc - locale

Return value

Returns true if the character is classified as printable, false otherwise.

Possible implementation

  template< class charT >
  bool isprint( charT ch, const std::locale& loc ) {
      return std::use_facet<std::ctype<charT>>(loc).is(std::ctype_base::print, ch);


Demonstrates the use of isprint() with different locales (OS-specific).
// Run this code

  #include <iostream>
  #include <locale>
  int main()
      const wchar_t c = L'\u2122'; // trademark sign

      std::locale loc1("C");
      std::cout << "isprint('™', C locale) returned "
                 << std::boolalpha << std::isprint(c, loc1) << '\n';

      std::locale loc2("en_US.UTF-8");
      std::cout << "isprint('™', Unicode locale) returned "
                << std::boolalpha << std::isprint(c, loc2) << '\n';


  isprint('™', C locale) returned false
  isprint('™', Unicode locale) returned true

See also

         checks if a character is a printing character
isprint (function)
         checks if a wide character is a printing character
iswprint (function)