NAME¶

std::isspace(std::locale) - std::isspace(std::locale)

Synopsis¶

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

Checks if the given character is classified as a whitespace character by the given
locale's std::ctype facet.

Parameters¶

ch - character
loc - locale

Return value¶

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

Possible implementation¶

template<class CharT>
bool isspace(CharT ch, const std::locale& loc)
{
return std::use_facet<std::ctype<CharT>>(loc).is(std::ctype_base::space, ch);
}

Example¶

Demonstrates the use of std::isspace() with different locales (OS-specific).

// Run this code

#include <iostream>
#include <locale>

void try_with(wchar_t c, const char* loc)
{
std::wcout << "isspace('" << c << "', locale(\"" << loc << "\")) returned "
<< std::boolalpha << std::isspace(c, std::locale(loc)) << '\n';
}

int main()
{
const wchar_t EM_SPACE = L'\u2003'; // Unicode character 'EM SPACE'
try_with(EM_SPACE, "C");
try_with(EM_SPACE, "en_US.UTF8");
}

Possible output:¶

isspace(' ', locale("C")) returned false
isspace(' ', locale("en_US.UTF8")) returned true

See also¶

isspace checks if a character is a space character
(function)
iswspace checks if a wide character is a space character
(function)