rust/tests/ui/cmp_nan.rs

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#[warn(cmp_nan)]
#[allow(float_cmp, no_effect, unnecessary_operation)]
fn main() {
let x = 5f32;
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x == std::f32::NAN;
x != std::f32::NAN;
x < std::f32::NAN;
x > std::f32::NAN;
x <= std::f32::NAN;
x >= std::f32::NAN;
let y = 0f64;
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y == std::f64::NAN;
y != std::f64::NAN;
y < std::f64::NAN;
y > std::f64::NAN;
y <= std::f64::NAN;
y >= std::f64::NAN;
}