46 lines
941 B
Rust
46 lines
941 B
Rust
//@ check-pass
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// Test that `ref` patterns may be used on both sides
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// of an `@` pattern according to NLL borrowck.
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fn main() {
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struct U; // Not copy!
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// Promotion:
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let ref a @ ref b = U;
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let _: &U = a;
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let _: &U = b;
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// Prevent promotion:
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fn u() -> U { U }
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let ref a @ ref b = u();
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let _: &U = a;
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let _: &U = b;
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let ref a @ (ref b, [ref c, ref d]) = (u(), [u(), u()]);
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let _: &(U, [U; 2]) = a;
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let _: &U = b;
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let _: &U = c;
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let _: &U = d;
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fn f1(ref a @ (ref b, [ref c, ref mid @ .., ref d]): (U, [U; 4])) {}
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let a @ (b, [c, d]) = &(u(), [u(), u()]);
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let _: &(U, [U; 2]) = a;
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let _: &U = b;
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let _: &U = c;
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let _: &U = d;
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let ref a @ &ref b = &u();
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let _: &&U = a;
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let _: &U = b;
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match Ok(u()) {
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ref a @ Ok(ref b) | ref a @ Err(ref b) => {
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let _: &Result<U, U> = a;
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let _: &U = b;
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}
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}
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}
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