26 lines
478 B
Rust
26 lines
478 B
Rust
trait connection {
|
|
fn read() -> int;
|
|
}
|
|
|
|
trait connection_factory<C: connection> {
|
|
fn create() -> C;
|
|
}
|
|
|
|
type my_connection = ();
|
|
type my_connection_factory = ();
|
|
|
|
impl of connection for () {
|
|
fn read() -> int { 43 }
|
|
}
|
|
|
|
impl of connection_factory<my_connection> for my_connection_factory {
|
|
fn create() -> my_connection { () }
|
|
}
|
|
|
|
fn main() {
|
|
let factory = ();
|
|
let connection = factory.create();
|
|
let result = connection.read();
|
|
assert result == 43;
|
|
}
|