rust/src/test/run-pass/record-pat.rs

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tag t1 { a(int); b(uint); }
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type t2 = {x: t1, y: int};
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tag t3 { c(t2, uint); }
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fn m(in: &t3) -> int {
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alt in {
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c({x: a(m), _}, _) { ret m; }
c({x: b(m), y: y}, z) { ret (m + z as int) + y; }
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}
}
fn main() {
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assert (m(c({x: a(10), y: 5}, 4u)) == 10);
assert (m(c({x: b(10u), y: 5}, 4u)) == 19);
}