numeric_limits::has_signaling_NaN
Tests whether a type has a representation for signaling not a number (NAN).
Syntax
static const bool has_signaling_NaN = false;
Return Value
true if the type has a representation for a signaling NAN; false if not.
Remarks
A signaling NAN is an encoding for not a number, which signals its presence in an expression. The return value is true is_iec559 is true.
Example
// numeric_limits_has_signaling_nan.cpp
// compile with: /EHsc
#include <iostream>
#include <limits>
using namespace std;
int main( )
{
cout << "Whether float objects have a signaling_NaN: "
<< numeric_limits<float>::has_signaling_NaN
<< endl;
cout << "Whether double objects have a signaling_NaN: "
<< numeric_limits<double>::has_signaling_NaN
<< endl;
cout << "Whether long int objects have a signaling_NaN: "
<< numeric_limits<long int>::has_signaling_NaN
<< endl;
}
Whether float objects have a signaling_NaN: 1 Whether double objects have a signaling_NaN: 1 Whether long int objects have a signaling_NaN: 0
Requirements
Header: <limits>
Namespace: std