| Defined in header <locale> | ||
|---|---|---|
template< class charT > bool isblank( charT ch, const locale& loc ); | (since C++11) |
Checks if the given character is classified as a blank character by the given locale's ctype facet.
Parameters
| ch | - | character |
| loc | - | locale |
Return value
Returns true if the character is classified as a blank character, false otherwise.
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);
} |
Example
Demonstrates the use of isblank() with different locales (OS-specific).
#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");
}Output:
isblank(' ', locale("C")) returned false
isblank(' ', locale("en_US.UTF-8")) returned trueSee also
| (C++11) | checks if a character is a blank character (function) |
| (C++11) | checks if a wide character is a blank character (function) |
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