22 lines
342 B
Rust
22 lines
342 B
Rust
#![feature(specialization)]
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trait IsUnit {
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fn is_unit() -> bool;
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}
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impl<T> IsUnit for T {
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default fn is_unit() -> bool { false }
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}
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impl IsUnit for () {
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fn is_unit() -> bool { true }
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}
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fn specialization() -> (bool, bool) {
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(i32::is_unit(), <()>::is_unit())
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}
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fn main() {
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assert_eq!(specialization(), (false, true));
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}
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