mirror of https://github.com/rust-lang/rust
37 lines
836 B
Rust
37 lines
836 B
Rust
// Matching against NaN should result in an error
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#![allow(unused)]
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const NAN: f64 = f64::NAN;
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#[derive(PartialEq, Eq)]
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struct MyType<T>(T);
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const C: MyType<f32> = MyType(f32::NAN);
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fn main() {
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let x = NAN;
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match x {
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NAN => {}, //~ ERROR cannot use NaN in patterns
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_ => {},
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};
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match [x, 1.0] {
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[NAN, _] => {}, //~ ERROR cannot use NaN in patterns
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_ => {},
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};
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match MyType(1.0f32) {
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C => {}, //~ ERROR cannot use NaN in patterns
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_ => {},
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}
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// Also cover range patterns
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match x {
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NAN..=1.0 => {}, //~ ERROR cannot use NaN in patterns
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-1.0..=NAN => {}, //~ ERROR cannot use NaN in patterns
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NAN.. => {}, //~ ERROR cannot use NaN in patterns
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..NAN => {}, //~ ERROR cannot use NaN in patterns
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_ => {},
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};
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}
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