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Defined in header <locale>

template< class charT >
bool isblank( charT ch, const locale& loc );
(C++11 feature)

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


[edit] Parameters

ch - character
loc - locale

[edit] Return value

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

[edit] Equivalent function

[edit] Example

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

#include <iostream>
#include <locale>
template< class charT >
void try_with(wchar_t c, const char* loc)
    std::wcout << "isblank('" << c << "', locale(\"" << loc << "\")) returned " << std::boolalpha
               << std::isblank(c, std::locale(loc)) << '\n';
int main()
    const wchar_t IDEO_SPACE = L'\u3000'; // Unicode character 'IDEOGRAPHIC SPACE'
    try_with(IDEO_SPACE, "C");
    try_with(IDEO_SPACE, "en_US.UTF-8");


isblank(' ', locale("C")) returned false
isblank(' ', locale("en_US.UTF-8")) returned true

[edit] See also

isblank (C++11)
checks if a character is a blank character
iswblank (C++11)
checks if a wide character is a blank character