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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
commit | 698f8c2f01ea549d77d7dc3338a12e04c11057b9 (patch) | |
tree | 173a775858bd501c378080a10dca74132f05bc50 /src/test/ui/pattern/bindings-after-at/borrowck-pat-ref-both-sides.rs | |
parent | Initial commit. (diff) | |
download | rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.tar.xz rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.zip |
Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/test/ui/pattern/bindings-after-at/borrowck-pat-ref-both-sides.rs')
-rw-r--r-- | src/test/ui/pattern/bindings-after-at/borrowck-pat-ref-both-sides.rs | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/src/test/ui/pattern/bindings-after-at/borrowck-pat-ref-both-sides.rs b/src/test/ui/pattern/bindings-after-at/borrowck-pat-ref-both-sides.rs new file mode 100644 index 000000000..df213f688 --- /dev/null +++ b/src/test/ui/pattern/bindings-after-at/borrowck-pat-ref-both-sides.rs @@ -0,0 +1,45 @@ +// check-pass + +// Test that `ref` patterns may be used on both sides +// of an `@` pattern according to NLL borrowck. + +fn main() { + struct U; // Not copy! + + // Promotion: + let ref a @ ref b = U; + let _: &U = a; + let _: &U = b; + + // Prevent promotion: + fn u() -> U { U } + + let ref a @ ref b = u(); + let _: &U = a; + let _: &U = b; + + let ref a @ (ref b, [ref c, ref d]) = (u(), [u(), u()]); + let _: &(U, [U; 2]) = a; + let _: &U = b; + let _: &U = c; + let _: &U = d; + + fn f1(ref a @ (ref b, [ref c, ref mid @ .., ref d]): (U, [U; 4])) {} + + let a @ (b, [c, d]) = &(u(), [u(), u()]); + let _: &(U, [U; 2]) = a; + let _: &U = b; + let _: &U = c; + let _: &U = d; + + let ref a @ &ref b = &u(); + let _: &&U = a; + let _: &U = b; + + match Ok(u()) { + ref a @ Ok(ref b) | ref a @ Err(ref b) => { + let _: &Result<U, U> = a; + let _: &U = b; + } + } +} |