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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/borrowck-loan-vec-content.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/borrowck-loan-vec-content.rs')
-rw-r--r-- | tests/ui/borrowck/borrowck-loan-vec-content.rs | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/tests/ui/borrowck/borrowck-loan-vec-content.rs b/tests/ui/borrowck/borrowck-loan-vec-content.rs new file mode 100644 index 000000000..300ec88c5 --- /dev/null +++ b/tests/ui/borrowck/borrowck-loan-vec-content.rs @@ -0,0 +1,24 @@ +// Here we check that it is allowed to lend out an element of a +// (locally rooted) mutable, unique vector, and that we then prevent +// modifications to the contents. + +fn takes_imm_elt<F>(_v: &isize, f: F) where F: FnOnce() { + f(); +} + +fn has_mut_vec_and_does_not_try_to_change_it() { + let mut v: Vec<isize> = vec![1, 2, 3]; + takes_imm_elt(&v[0], || {}) +} + +fn has_mut_vec_but_tries_to_change_it() { + let mut v: Vec<isize> = vec![1, 2, 3]; + takes_imm_elt( + &v[0], + || { //~ ERROR cannot borrow `v` as mutable + v[1] = 4; + }) +} + +fn main() { +} |