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V6038. Comparison with 'double.NaN' is meaningless. Use 'double.isNaN()' method instead.
The analyzer detected that a variable of type float or double is compared with a Float.NaN or Double.NaN value. As stated in the documentation (15.21.1), if two Double.NaN values are tested for equality by using the '==' operator, the result is false. So, no matter what value of 'double' type is compared with Double.NaN, the result is always false.
Consider the following example:
void Func(double d) {
if (d == Double.NaN) {
....
}
}It's incorrect to test the value for NaN using operators '==' and '!= '. Instead, method Float.isNaN() or Double.isNaN() should be used. The fixed version of the code:
void Func(double d) {
if (Double.isNaN(d)) {
....
}
}This diagnostic is classified as:
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