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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 {
| +++++++++++++++++++
```
56 lines
2.0 KiB
Plaintext
56 lines
2.0 KiB
Plaintext
error[E0277]: `T` is not a tuple
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--> $DIR/builtin-fail.rs:8:23
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LL | assert_is_tuple::<T>();
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| ^ the trait `Tuple` is not implemented for `T`
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note: required by a bound in `assert_is_tuple`
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--> $DIR/builtin-fail.rs:3:23
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LL | fn assert_is_tuple<T: std::marker::Tuple + ?Sized>() {}
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| ^^^^^^^^^^^^^^^^^^ required by this bound in `assert_is_tuple`
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help: consider restricting type parameter `T` with unstable trait `Tuple`
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LL | fn from_param_env<T: std::marker::Tuple>() {
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| ++++++++++++++++++++
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error[E0277]: `i32` is not a tuple
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--> $DIR/builtin-fail.rs:13:23
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LL | assert_is_tuple::<i32>();
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| ^^^ the trait `Tuple` is not implemented for `i32`
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note: required by a bound in `assert_is_tuple`
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--> $DIR/builtin-fail.rs:3:23
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LL | fn assert_is_tuple<T: std::marker::Tuple + ?Sized>() {}
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| ^^^^^^^^^^^^^^^^^^ required by this bound in `assert_is_tuple`
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error[E0277]: `i32` is not a tuple
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--> $DIR/builtin-fail.rs:15:24
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LL | assert_is_tuple::<(i32)>();
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| ^^^ the trait `Tuple` is not implemented for `i32`
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note: required by a bound in `assert_is_tuple`
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--> $DIR/builtin-fail.rs:3:23
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LL | fn assert_is_tuple<T: std::marker::Tuple + ?Sized>() {}
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| ^^^^^^^^^^^^^^^^^^ required by this bound in `assert_is_tuple`
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error[E0277]: `TupleStruct` is not a tuple
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--> $DIR/builtin-fail.rs:17:23
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LL | assert_is_tuple::<TupleStruct>();
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| ^^^^^^^^^^^ the trait `Tuple` is not implemented for `TupleStruct`
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note: required by a bound in `assert_is_tuple`
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--> $DIR/builtin-fail.rs:3:23
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LL | fn assert_is_tuple<T: std::marker::Tuple + ?Sized>() {}
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| ^^^^^^^^^^^^^^^^^^ required by this bound in `assert_is_tuple`
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error: aborting due to 4 previous errors
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For more information about this error, try `rustc --explain E0277`.
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