Implement is_nan for the complex type

Also run the associated test
This commit is contained in:
Abhishek Chanda 2015-09-12 19:24:44 -07:00
parent 49237f6f45
commit e5099930e7
1 changed files with 23 additions and 4 deletions

View File

@ -281,6 +281,12 @@ impl<T: Clone + Float> Complex<T> {
}
((one + self).ln() - (one - self).ln()) / two
}
/// Checks if the given complex number is NaN
#[inline]
pub fn is_nan(self) -> bool {
self.re.is_nan() || self.im.is_nan()
}
}
macro_rules! forward_val_val_binop {
@ -514,11 +520,9 @@ mod test {
}
#[test]
#[should_panic]
#[ignore]
fn test_inv_zero() {
// FIXME #5736: should this really fail, or just NaN?
_0_0i.inv();
// FIXME #20: should this really fail, or just NaN?
assert!(_0_0i.inv().is_nan());
}
#[test]
@ -920,4 +924,19 @@ mod test {
assert!(::hash(&b) != ::hash(&c));
assert!(::hash(&c) != ::hash(&a));
}
#[test]
fn test_is_nan() {
assert!(!_1_1i.is_nan());
let a = Complex::new(f64::NAN, f64::NAN);
assert!(a.is_nan());
}
#[test]
fn test_is_nan_special_cases() {
let a = Complex::new(0f64, f64::NAN);
let b = Complex::new(f64::NAN, 0f64);
assert!(a.is_nan());
assert!(b.is_nan());
}
}