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// run-pass
pub fn main() {
let nan: f64 = f64::NAN;
assert!((nan).is_nan());
let inf: f64 = f64::INFINITY;
let neg_inf: f64 = -f64::INFINITY;
assert_eq!(-inf, neg_inf);
assert!( nan != nan);
assert!( nan != -nan);
assert!(-nan != -nan);
assert!(-nan != nan);
assert!( nan != 1.);
assert!( nan != 0.);
assert!( nan != inf);
assert!( nan != -inf);
assert!( 1. != nan);
assert!( 0. != nan);
assert!( inf != nan);
assert!(-inf != nan);
assert!(!( nan == nan));
assert!(!( nan == -nan));
assert!(!( nan == 1.));
assert!(!( nan == 0.));
assert!(!( nan == inf));
assert!(!( nan == -inf));
assert!(!( 1. == nan));
assert!(!( 0. == nan));
assert!(!( inf == nan));
assert!(!(-inf == nan));
assert!(!(-nan == nan));
assert!(!(-nan == -nan));
assert!(!( nan > nan));
assert!(!( nan > -nan));
assert!(!( nan > 0.));
assert!(!( nan > inf));
assert!(!( nan > -inf));
assert!(!( 0. > nan));
assert!(!( inf > nan));
assert!(!(-inf > nan));
assert!(!(-nan > nan));
assert!(!(nan < 0.));
assert!(!(nan < 1.));
assert!(!(nan < -1.));
assert!(!(nan < inf));
assert!(!(nan < -inf));
assert!(!(nan < nan));
assert!(!(nan < -nan));
assert!(!( 0. < nan));
assert!(!( 1. < nan));
assert!(!( -1. < nan));
assert!(!( inf < nan));
assert!(!(-inf < nan));
assert!(!(-nan < nan));
assert!((nan + inf).is_nan());
assert!((nan + -inf).is_nan());
assert!((nan + 0.).is_nan());
assert!((nan + 1.).is_nan());
assert!((nan * 1.).is_nan());
assert!((nan / 1.).is_nan());
assert!((nan / 0.).is_nan());
assert!((0.0/0.0f64).is_nan());
assert!((-inf + inf).is_nan());
assert!((inf - inf).is_nan());
assert!(!(-1.0f64).is_nan());
assert!(!(0.0f64).is_nan());
assert!(!(0.1f64).is_nan());
assert!(!(1.0f64).is_nan());
assert!(!(inf).is_nan());
assert!(!(-inf).is_nan());
assert!(!(1./-inf).is_nan());
}
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