rust/src/test/run-pass/regions-iface.rs

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type ctxt = { v: uint };
iface get_ctxt/& {
fn get_ctxt() -> &self.ctxt;
}
type has_ctxt/& = { c: &ctxt };
impl/& of get_ctxt for has_ctxt {
fn get_ctxt() -> &self.ctxt {
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;
}