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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:19:13 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:19:13 +0000 |
commit | 218caa410aa38c29984be31a5229b9fa717560ee (patch) | |
tree | c54bd55eeb6e4c508940a30e94c0032fbd45d677 /tests/ui/borrowck/kindck-implicit-close-over-mut-var.rs | |
parent | Releasing progress-linux version 1.67.1+dfsg1-1~progress7.99u1. (diff) | |
download | rustc-218caa410aa38c29984be31a5229b9fa717560ee.tar.xz rustc-218caa410aa38c29984be31a5229b9fa717560ee.zip |
Merging upstream version 1.68.2+dfsg1.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tests/ui/borrowck/kindck-implicit-close-over-mut-var.rs')
-rw-r--r-- | tests/ui/borrowck/kindck-implicit-close-over-mut-var.rs | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/tests/ui/borrowck/kindck-implicit-close-over-mut-var.rs b/tests/ui/borrowck/kindck-implicit-close-over-mut-var.rs new file mode 100644 index 000000000..5b5d86eec --- /dev/null +++ b/tests/ui/borrowck/kindck-implicit-close-over-mut-var.rs @@ -0,0 +1,49 @@ +// run-pass + +#![allow(unused_must_use)] +#![allow(dead_code)] +use std::thread; + +fn user(_i: isize) {} + +fn foo() { + // Here, i is *copied* into the proc (heap closure). + // Requires allocation. The proc's copy is not mutable. + let mut i = 0; + let t = thread::spawn(move|| { + user(i); + println!("spawned {}", i) + }); + i += 1; + println!("original {}", i); + t.join(); +} + +fn bar() { + // Here, the original i has not been moved, only copied, so is still + // mutable outside of the proc. + let mut i = 0; + while i < 10 { + let t = thread::spawn(move|| { + user(i); + }); + i += 1; + t.join(); + } +} + +fn car() { + // Here, i must be shadowed in the proc to be mutable. + let mut i = 0; + while i < 10 { + let t = thread::spawn(move|| { + let mut i = i; + i += 1; + user(i); + }); + i += 1; + t.join(); + } +} + +pub fn main() {} |