std::isblank(std::locale)
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Defined in header
<locale>
template< class CharT >
bool isblank( CharT ch, const locale& loc );
(since C++11)
bool isblank( CharT ch, const locale& loc );
Checks if the given character is classified as a blank character by the given locale's std::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] Possible implementation
template<class CharT> bool isblank(CharT ch, const std::locale & loc) { return std::use_facet <std::ctype <CharT>>(loc).is(std::ctype_base::blank, ch); }
[edit] Example
Demonstrates the use of isblank() with different locales (OS-specific).
Run this code
#include <iostream> #include <locale> 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"); }
Possible output:
isblank(' ', locale("C")) returned false
isblank(' ', locale("en_US.UTF-8")) returned true