rust/src/test/run-pass/alt-pattern-drop.rs

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// -*- rust -*-
use std;
import std::str;
// FIXME: import std::dbg.const_refcount. Currently
// cross-crate const references don't work.
const uint const_refcount = 0x7bad_face_u;
tag t { make_t(str); clam; }
fn foo(str s) {
let t x = make_t(s); // ref up
alt (x) {
case (make_t(?y)) {
log y; // ref up then down
}
case (_) { log "?"; fail; }
}
log str::refcount(s);
assert (str::refcount(s) == const_refcount);
}
fn main() {
let str s = "hi"; // ref up
foo(s); // ref up then down
log str::refcount(s);
assert (str::refcount(s) == const_refcount);
}