rust-clippy/tests/ui/entry_btree.stderr
Jason Newcomb 4838c78ba4
Improve manual_map and map_entry
Locals which can be partially moved created within the to-be-created closure shouldn't block the use of a closure
2021-08-14 19:49:45 -04:00

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Text

error: usage of `contains_key` followed by `insert` on a `BTreeMap`
--> $DIR/entry_btree.rs:12:5
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LL | / if !m.contains_key(&k) {
LL | | m.insert(k, v);
LL | | foo();
LL | | }
| |_____^
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= note: `-D clippy::map-entry` implied by `-D warnings`
help: try this
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LL ~ if let std::collections::btree_map::Entry::Vacant(e) = m.entry(k) {
LL + e.insert(v);
LL + foo();
LL + }
|
error: aborting due to previous error