std::isalnum(std::locale)

Header: <locale>

Checks if the given character is classified as an alphanumeric character by the given locale’s std::ctype facet.

# Declarations

template< class CharT >
bool isalnum( CharT ch, const locale& loc );

# Parameters

# Return value

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

# Example

#include <iostream>
#include <locale>
 
int main()
{
    const wchar_t c = L'\u2135'; // mathematical symbol aleph
 
    std::locale loc1("C");
    std::cout << "isalnum('ℵ', C locale) returned "
              << std::boolalpha << std::isalnum(c, loc1) << '\n';
 
    std::locale loc2("en_US.UTF-8");
    std::cout << "isalnum('ℵ', Unicode locale) returned "
              << std::boolalpha << std::isalnum(c, loc2) << '\n';
}

# See also