717c481739
When implementing a public trait with a private super-trait, we now emit a note that the missing bound is not going to be able to be satisfied, and we explain the concept of a sealed trait.
17 lines
749 B
Plaintext
17 lines
749 B
Plaintext
error[E0277]: the trait bound `S: Hidden` is not satisfied
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--> $DIR/sealed-trait-local.rs:17:20
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LL | impl a::Sealed for S {}
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| ^ the trait `Hidden` is not implemented for `S`
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note: required by a bound in `Sealed`
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--> $DIR/sealed-trait-local.rs:3:23
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LL | pub trait Sealed: self::b::Hidden {
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| ^^^^^^^^^^^^^^^ required by this bound in `Sealed`
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= note: `Sealed` is a "sealed trait", because to implement it you also need to implelement `a::b::Hidden`, which is not accessible; this is usually done to force you to use one of the provided types that already implement it
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error: aborting due to previous error
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For more information about this error, try `rustc --explain E0277`.
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