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a few more inf/nan/negz tests

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Ralf Jung
2020-04-11 09:32:34 +02:00
parent 910afefcf6
commit c63c413331
1 changed files with 13 additions and 0 deletions
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tests/run-pass/float.rs
+13
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@@ -18,9 +18,22 @@ fn main() {
assert_eq(-{5.0_f64}, -5.0_f64);
// infinities, NaN
assert!((5.0_f32/0.0).is_infinite());
assert_ne!({5.0_f32/0.0}, {-5.0_f32/0.0});
assert!((5.0_f64/0.0).is_infinite());
assert_ne!({5.0_f64/0.0}, {5.0_f64/-0.0});
assert!((-5.0_f32).sqrt().is_nan());
assert!((-5.0_f64).sqrt().is_nan());
assert_ne!(f32::NAN, f32::NAN);
assert_ne!(f64::NAN, f64::NAN);
// negative zero
let posz = 0.0f32;
let negz = -0.0f32;
assert_eq(posz, negz);
assert_ne!(posz.to_bits(), negz.to_bits());
let posz = 0.0f64;
let negz = -0.0f64;
assert_eq(posz, negz);
assert_ne!(posz.to_bits(), negz.to_bits());
// byte-level transmute
let x: u64 = unsafe { std::mem::transmute(42.0_f64) };
let y: f64 = unsafe { std::mem::transmute(x) };