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std::isspace(std::locale)

From cppreference.com
< cpp‎ | locale
Defined in header <locale>
template< class charT >
bool isspace( charT ch, const locale& loc );


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

Contents

[edit] Parameters

ch - character
loc - locale

[edit] Return value

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

[edit] 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);
}

[edit] Example

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

#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");
}

Output:

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

[edit] See also

checks if a character is a space character
(function) [edit]
checks if a wide character is a space character
(function) [edit]