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27 lines
539 B
Rust
27 lines
539 B
Rust
// run-pass
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// pretty-expanded FIXME #23616
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pub trait NumCast: Sized {
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fn from(i: i32) -> Option<Self>;
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}
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pub trait NumExt: PartialEq + NumCast {}
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impl NumExt for f32 {}
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impl NumExt for isize {}
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impl NumCast for f32 {
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fn from(i: i32) -> Option<f32> { Some(i as f32) }
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}
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impl NumCast for isize {
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fn from(i: i32) -> Option<isize> { Some(i as isize) }
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}
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fn num_eq_one<T:NumExt>() -> T {
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NumCast::from(1).unwrap()
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}
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pub fn main() {
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num_eq_one::<isize>(); // you need to actually use the function to trigger the ICE
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}
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