function template
<locale>
std::isblank
template <class charT> bool isblank (charT c, const locale& loc);
Check if character is blank using locale
Checks whether c is a blank character using the ctype facet of locale loc, returning the same as if ctype::is is called as:
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use_facet < ctype<charT> > (loc).is (ctype_base::blank, c)
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This function template overloads the C function isblank (defined in <cctype>).
Parameters
- c
- Character to be checked.
- loc
- Locale to be used. It shall have a ctype facet.
The template argument charT is the character type.
Return Value
true if indeed c is a blank character.
false otherwise.
Example
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// isblank example (C++11)
#include <iostream> // std::cout
#include <string> // std::string
#include <locale> // std::locale, std::isblank
int main ()
{
std::locale loc;
std::string str="Example sentence to test isblank\n";
for (char c:str)
{
if (std::isblank(c,loc)) c='\n';
std::cout << c;
}
return 0;
}
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Output:
Example
sentence
to
test
isblank
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Data races
Both loc and its ctype facet are accessed.
Exception safety
Strong guarantee: if an exception is thrown, there are no effects.
See also
- ctype
- Character type facet (class template)
- isblank (cctype)
- Check if character is blank (function)
- isspace
- Check if character is a white-space using locale (function template)