3f2a63a68b
```
help: consider restricting type parameter `T` with traits `Copy` and `Trait`
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LL | fn duplicate_custom<T: Copy + Trait>(t: S<T>) -> (S<T>, S<T>) {
| ++++++++++++++
```
```
help: consider restricting type parameter `V` with trait `Copy`
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LL | fn index<'a, K, V: std::marker::Copy>(map: &'a HashMap<K, V>, k: K) -> &'a V {
| +++++++++++++++++++
```
23 lines
818 B
Plaintext
23 lines
818 B
Plaintext
error[E0204]: the trait `Copy` cannot be implemented for this type
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--> $DIR/missing-bound-in-manual-copy-impl-2.rs:17:18
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LL | struct Wrapper<T>(T);
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| - this field does not implement `Copy`
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...
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LL | impl<S> Copy for Wrapper<OnlyCopyIfDisplay<S>> {}
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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note: the `Copy` impl for `OnlyCopyIfDisplay<S>` requires that `S: std::fmt::Display`
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--> $DIR/missing-bound-in-manual-copy-impl-2.rs:5:19
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LL | struct Wrapper<T>(T);
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| ^
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help: consider restricting type parameter `S` with trait `Display`
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LL | impl<S: std::fmt::Display> Copy for Wrapper<OnlyCopyIfDisplay<S>> {}
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| +++++++++++++++++++
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error: aborting due to 1 previous error
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For more information about this error, try `rustc --explain E0204`.
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