mirror of https://github.com/rust-lang/rust
35 lines
588 B
Rust
35 lines
588 B
Rust
//@ run-pass
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// Test that we can use method notation to call methods based on a
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// where clause type, and not only type parameters.
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trait Foo {
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fn foo(&self) -> i32;
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}
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impl Foo for Option<i32>
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{
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fn foo(&self) -> i32 {
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self.unwrap_or(22)
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}
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}
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impl Foo for Option<u32>
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{
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fn foo(&self) -> i32 {
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self.unwrap_or(22) as i32
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}
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}
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fn check<T>(x: Option<T>) -> (i32, i32)
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where Option<T> : Foo
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{
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let y: Option<T> = None;
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(x.foo(), y.foo())
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}
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fn main() {
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assert_eq!(check(Some(23u32)), (23, 22));
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assert_eq!(check(Some(23)), (23, 22));
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}
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