29 lines
558 B
Rust
29 lines
558 B
Rust
type ctxt = { v: uint };
|
|
|
|
iface get_ctxt {
|
|
// Here the `&` is bound in the method definition:
|
|
fn get_ctxt() -> &ctxt;
|
|
}
|
|
|
|
type has_ctxt = { c: &ctxt };
|
|
|
|
impl of get_ctxt for has_ctxt {
|
|
|
|
// Here an error occurs because we used `&self` but
|
|
// the definition used `&`:
|
|
fn get_ctxt() -> &self/ctxt { //~ ERROR method `get_ctxt` has an incompatible type
|
|
self.c
|
|
}
|
|
|
|
}
|
|
|
|
fn get_v(gc: get_ctxt) -> uint {
|
|
gc.get_ctxt().v
|
|
}
|
|
|
|
fn main() {
|
|
let ctxt = { v: 22u };
|
|
let hc = { c: &ctxt };
|
|
assert get_v(hc as get_ctxt) == 22u;
|
|
}
|