std::isalpha(std::locale)
From cppreference.com
| Defined in header <locale>
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template< class CharT >
bool isalpha( CharT ch, const locale& loc );
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Checks if the given character is classified as an alphabetic character by the given locale's std::ctype facet.
Parameters
| ch | - | character |
| loc | - | locale |
Return value
Returns true if the character is classified as alphabetic, false otherwise.
Possible implementation
template<class CharT>
bool isalpha(CharT ch, const std::locale& loc)
{
return std::use_facet<std::ctype<CharT>>(loc).is(std::ctype_base::alpha, ch);
}
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Example
Demonstrates the use of isalpha() with different locales (OS-specific).
Run this code
#include <iostream>
#include <locale>
int main()
{
const wchar_t c = L'\u042f'; // cyrillic capital letter ya
std::locale loc1("C");
std::cout << "isalpha('Я', C locale) returned "
<< std::boolalpha << std::isalpha(c, loc1) << '\n';
std::locale loc2("en_US.UTF8");
std::cout << "isalpha('Я', Unicode locale) returned "
<< std::boolalpha << std::isalpha(c, loc2) << '\n';
}
Possible output:
isalpha('Я', C locale) returned false
isalpha('Я', Unicode locale) returned true