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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-17 12:19:03 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-17 12:19:03 +0000
commit64d98f8ee037282c35007b64c2649055c56af1db (patch)
tree5492bcf97fce41ee1c0b1cc2add283f3e66cdab0 /tests/ui/closures/2229_closure_analysis/run_pass/multilevel-path-2.rs
parentAdding debian version 1.67.1+dfsg1-1. (diff)
downloadrustc-64d98f8ee037282c35007b64c2649055c56af1db.tar.xz
rustc-64d98f8ee037282c35007b64c2649055c56af1db.zip
Merging upstream version 1.68.2+dfsg1.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tests/ui/closures/2229_closure_analysis/run_pass/multilevel-path-2.rs')
-rw-r--r--tests/ui/closures/2229_closure_analysis/run_pass/multilevel-path-2.rs31
1 files changed, 31 insertions, 0 deletions
diff --git a/tests/ui/closures/2229_closure_analysis/run_pass/multilevel-path-2.rs b/tests/ui/closures/2229_closure_analysis/run_pass/multilevel-path-2.rs
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index 000000000..bd8addd37
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+++ b/tests/ui/closures/2229_closure_analysis/run_pass/multilevel-path-2.rs
@@ -0,0 +1,31 @@
+// edition:2021
+// run-pass
+
+#![allow(unused)]
+
+// If the closures can handle such precision we should be able to read one path in the closure
+// while being able mutate another path outside the closure, where the two paths are disjoint
+// after applying two projections on the root variable.
+
+
+struct Point {
+ x: i32,
+ y: i32,
+}
+struct Wrapper {
+ p: Point,
+}
+
+fn main() {
+ let mut w = Wrapper { p: Point { x: 10, y: 10 } };
+
+ let c = || {
+ println!("{}", w.p.x);
+ };
+
+ // `c` only captures `w.p.x`, therefore it's safe to mutate `w.p.y`.
+ let py = &mut w.p.y;
+ c();
+
+ *py = 20
+}