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Trait suggestions for type parameters should suggest using the traits as bounds #21673

huonw opened this issue Jan 26, 2015 · 2 comments


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commented Jan 26, 2015

trait Foo { fn method(&self) {} }

fn call_method<T>(x: &T) {

fn main() {}

currently gives

error[E0599]: no method named `method` found for type `&T` in the current scope
 --> src/
4 |     x.method()
  |       ^^^^^^
  = help: items from traits can only be used if the trait is implemented and in scope
  = note: the following trait defines an item `method`, perhaps you need to implement it:
          candidate #1: `Foo`

but the long help would be better as something like:

methods from traits can only be called if the the type parameter is bounded those traits; the following trait defines a method method:


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commented Nov 4, 2015

Triage: the error is very similar today.


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commented Sep 24, 2018

Triage: no change

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