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generic_trait.rs
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generic_trait.rs
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//@ run-pass
#![allow(dead_code)]
#![allow(non_camel_case_types)]
#![allow(non_snake_case)]
trait connection {
fn read(&self) -> isize;
}
trait connection_factory<C:connection> {
fn create(&self) -> C;
}
type my_connection = ();
type my_connection_factory = ();
impl connection for () {
fn read(&self) -> isize { 43 }
}
impl connection_factory<my_connection> for my_connection_factory {
fn create(&self) -> my_connection { () }
}
pub fn main() {
let factory = ();
let connection: () = factory.create();
let result = connection.read();
assert_eq!(result, 43);
}
// ferrocene-annotations: fls_exe4zodlwfez
// Type Unification
//
// ferrocene-annotations: fls_jeoas4n6su4
// Trait and Lifetime Bounds
//
// ferrocene-annotations: fls_ikfvbeewame7
// Subtyping and Variance
//
// ferrocene-annotations: fls_qa98qdi42orq
// Trait Object Types
//
// ferrocene-annotations: fls_vhpwge5123cm
// Generic Parameters