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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/borrowck/suggest-as-ref-on-mut-closure.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/suggest-as-ref-on-mut-closure.rs')
-rw-r--r-- | src/test/ui/borrowck/suggest-as-ref-on-mut-closure.rs | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/src/test/ui/borrowck/suggest-as-ref-on-mut-closure.rs b/src/test/ui/borrowck/suggest-as-ref-on-mut-closure.rs new file mode 100644 index 000000000..1dcf04618 --- /dev/null +++ b/src/test/ui/borrowck/suggest-as-ref-on-mut-closure.rs @@ -0,0 +1,16 @@ +// This is not exactly right, yet. + +// Ideally we should be suggesting `as_mut` for the first case, +// and suggesting to change `as_ref` to `as_mut` in the second. + +fn x(cb: &mut Option<&mut dyn FnMut()>) { + cb.map(|cb| cb()); + //~^ ERROR cannot move out of `*cb` which is behind a mutable reference +} + +fn x2(cb: &mut Option<&mut dyn FnMut()>) { + cb.as_ref().map(|cb| cb()); + //~^ ERROR cannot borrow `*cb` as mutable, as it is behind a `&` reference +} + +fn main() {} |