33 lines
490 B
Rust
33 lines
490 B
Rust
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// -*- rust -*-
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use std;
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import std::dbg;
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tag t { make_t(@int); clam; }
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fn foo(s: @int) {
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let count = dbg::refcount(s);
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let x: t = make_t(s); // ref up
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alt x {
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make_t(y) {
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log y; // ref up then down
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}
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_ { log "?"; fail; }
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}
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log dbg::refcount(s);
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assert (dbg::refcount(s) == count + 1u);
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}
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fn main() {
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let s: @int = @0; // ref up
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foo(s); // ref up then down
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log dbg::refcount(s);
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assert (dbg::refcount(s) == 1u);
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}
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