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26 lines
672 B
Rust
26 lines
672 B
Rust
// run-pass
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// Tests "transitivity" of super-builtin-kinds on traits. Here, if
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// we have a Foo, we know we have a Bar, and if we have a Bar, we
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// know we have a Send. So if we have a Foo we should know we have
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// a Send. Basically this just makes sure rustc is using
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// each_bound_trait_and_supertraits in type_contents correctly.
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use std::sync::mpsc::{channel, Sender};
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trait Bar : Send { }
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trait Foo : Bar { }
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impl <T: Send> Foo for T { }
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impl <T: Send> Bar for T { }
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fn foo<T: Foo + 'static>(val: T, chan: Sender<T>) {
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chan.send(val).unwrap();
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}
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pub fn main() {
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let (tx, rx) = channel();
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foo(31337, tx);
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assert_eq!(rx.recv().unwrap(), 31337);
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}
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