From cppreference.com
template<classCharT>boolisblank(CharTch,constlocale&loc);(since C++11)Checks if the given character is classified as a blank character by the given locale's
facet.
Parameters
ch - character loc - locale Return value
Returns true if the character is classified as a blank character, false otherwise.
Possible implementation
template<classCharT>boolisblank(CharTch,conststd::locale&loc){returnstd::use_facet<std::ctype<CharT>>(loc).is(std::ctype_base::blank,ch);}Example
Demonstrates the use of isblank() with different locales (OS-specific).
Run this code
#include<iostream>#include<locale>voidtry_with(wchar_tc,constchar*loc){std::wcout<<"isblank('"<<c<<"', locale(\""<<loc<<"\")) returned "<<std::boolalpha<<std::isblank(c,std::locale(loc))<<'\n';}intmain(){constwchar_tIDEO_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 See also
(C++11)
checks if a character is a blank character
(function)
(C++11)
checks if a wide character is a blank character
(function)