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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:03:36 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:03:36 +0000 |
commit | 17d40c6057c88f4c432b0d7bac88e1b84cb7e67f (patch) | |
tree | 3f66c4a5918660bb8a758ab6cda5ff8ee4f6cdcd /src/test/ui/btreemap | |
parent | Adding upstream version 1.64.0+dfsg1. (diff) | |
download | rustc-17d40c6057c88f4c432b0d7bac88e1b84cb7e67f.tar.xz rustc-17d40c6057c88f4c432b0d7bac88e1b84cb7e67f.zip |
Adding upstream version 1.65.0+dfsg1.upstream/1.65.0+dfsg1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | src/test/ui/btreemap/btreemap-index-mut.rs | 6 | ||||
-rw-r--r-- | src/test/ui/btreemap/btreemap-index-mut.stderr | 19 |
2 files changed, 25 insertions, 0 deletions
diff --git a/src/test/ui/btreemap/btreemap-index-mut.rs b/src/test/ui/btreemap/btreemap-index-mut.rs new file mode 100644 index 000000000..62972acab --- /dev/null +++ b/src/test/ui/btreemap/btreemap-index-mut.rs @@ -0,0 +1,6 @@ +use std::collections::BTreeMap; + +fn main() { + let mut map = BTreeMap::<u32, u32>::new(); + map[&0] = 1; //~ ERROR cannot assign +} diff --git a/src/test/ui/btreemap/btreemap-index-mut.stderr b/src/test/ui/btreemap/btreemap-index-mut.stderr new file mode 100644 index 000000000..26f2a4c4b --- /dev/null +++ b/src/test/ui/btreemap/btreemap-index-mut.stderr @@ -0,0 +1,19 @@ +error[E0594]: cannot assign to data in an index of `BTreeMap<u32, u32>` + --> $DIR/btreemap-index-mut.rs:5:5 + | +LL | map[&0] = 1; + | ^^^^^^^^^^^ cannot assign + | + = help: trait `IndexMut` is required to modify indexed content, but it is not implemented for `BTreeMap<u32, u32>` +help: to modify a `BTreeMap<u32, u32>`, use `.get_mut()`, `.insert()` or the entry API + | +LL | map.insert(&0, 1); + | ~~~~~~~~ ~ + +LL | map.get_mut(&0).map(|val| { *val = 1; }); + | ~~~~~~~~~ ~~~~~~~~~~~~~~~~~~ ++++ +LL | let val = map.entry(&0).or_insert(1); + | +++++++++ ~~~~~~~ ~~~~~~~~~~~~ + + +error: aborting due to previous error + +For more information about this error, try `rustc --explain E0594`. |