mirror of https://github.com/rust-lang/rust
39 lines
1.8 KiB
Plaintext
39 lines
1.8 KiB
Plaintext
error[E0596]: cannot borrow data in an index of `HashMap<&str, String>` as mutable
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--> $DIR/index-mut-help.rs:10:5
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LL | map["peter"].clear();
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| ^^^^^^^^^^^^ cannot borrow as mutable
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= help: trait `IndexMut` is required to modify indexed content, but it is not implemented for `HashMap<&str, String>`
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= help: to modify a `HashMap<&str, String>`, use `.get_mut()`, `.insert()` or the entry API
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error[E0594]: cannot assign to data in an index of `HashMap<&str, String>`
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--> $DIR/index-mut-help.rs:11:5
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LL | map["peter"] = "0".to_string();
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| ^^^^^^^^^^^^ cannot assign
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= help: trait `IndexMut` is required to modify indexed content, but it is not implemented for `HashMap<&str, String>`
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help: to modify a `HashMap<&str, String>`, use `.get_mut()`, `.insert()` or the entry API
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LL | map.insert("peter", "0".to_string());
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| ~~~~~~~~ ~ +
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LL | map.get_mut("peter").map(|val| { *val = "0".to_string(); });
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| ~~~~~~~~~ ~~~~~~~~~~~~~~~~~~ ++++
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LL | let val = map.entry("peter").or_insert("0".to_string());
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| +++++++++ ~~~~~~~ ~~~~~~~~~~~~ +
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error[E0596]: cannot borrow data in an index of `HashMap<&str, String>` as mutable
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--> $DIR/index-mut-help.rs:12:13
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LL | let _ = &mut map["peter"];
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| ^^^^^^^^^^^^^^^^^ cannot borrow as mutable
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= help: trait `IndexMut` is required to modify indexed content, but it is not implemented for `HashMap<&str, String>`
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= help: to modify a `HashMap<&str, String>`, use `.get_mut()`, `.insert()` or the entry API
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error: aborting due to 3 previous errors
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Some errors have detailed explanations: E0594, E0596.
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For more information about an error, try `rustc --explain E0594`.
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