diff options
author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
---|---|---|
committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
commit | 698f8c2f01ea549d77d7dc3338a12e04c11057b9 (patch) | |
tree | 173a775858bd501c378080a10dca74132f05bc50 /src/test/ui/borrowck/kindck-implicit-close-over-mut-var.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/borrowck/kindck-implicit-close-over-mut-var.rs')
-rw-r--r-- | src/test/ui/borrowck/kindck-implicit-close-over-mut-var.rs | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/src/test/ui/borrowck/kindck-implicit-close-over-mut-var.rs b/src/test/ui/borrowck/kindck-implicit-close-over-mut-var.rs new file mode 100644 index 000000000..5b5d86eec --- /dev/null +++ b/src/test/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() {} |