Incorrect syntax when suggesting the use of Fn* traits as supertraits · Issue #118225 · rust-lang/rust (original) (raw)

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Description

Code

Box<dyn Fn(Vec<AstValueExpr>)->AstValueExpr + Clone>

Current output

The diagnosis suggests writing this code: only auto traits can be used as additional traits in a trait object consider creating a new trait with all of these as supertraits and using that trait here instead: trait NewTrait: Fn<(Vec<AstValueExpr>, )>+ Clone {}

Desired output

However, the use of Fn* series traits should be used as Fn(Vec<AstValueExpr>), that is, the correct suggestion should be trait NewTrait: Fn(Vec<AstValueExpr>)->AstValueExpr + Clone{}

Rationale and extra context

Other cases

No response

Anything else?

No response