has_facet
Tests if a particular facet is stored in a specified locale.
template<class Facet>
bool has_facet(
const locale& _Loc
);
Parameters
- _Loc
The locale to be tested for the presence of a facet.
Return Value
true if the locale has the facet tested for; false if it does not.
Remarks
The template function is useful for checking whether nonmandatory facets are listed in a locale before use_facet is called to avoid the exception that would be thrown if it were not present.
Example
// locale_has_facet.cpp
// compile with: /EHsc
#include <locale>
#include <iostream>
using namespace std;
int main( )
{
locale loc ( "German_Germany" );
bool result = has_facet <ctype<char> > ( loc );
cout << result << endl;
}
1
Requirements
Header: <locale>
Namespace: std