rust/src/test/compile-fail/regions-trait-1.rs
2012-08-02 17:58:56 -07:00

29 lines
558 B
Rust

type ctxt = { v: uint };
trait 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;
}