rust/src/test/compile-fail/trait-test-2.rs

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trait bar { fn dup() -> self; fn blah<X>(); }
impl of bar for int { fn dup() -> int { self } fn blah<X>() {} }
impl of bar for uint { fn dup() -> uint { self } fn blah<X>() {} }
fn main() {
10.dup::<int>(); //~ ERROR does not take type parameters
10.blah::<int, int>(); //~ ERROR incorrect number of type parameters
(10 as bar).dup(); //~ ERROR contains a self-type
}