New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

Does not support constrait on this.type #65

Open

Atry opened this issue Aug 23, 2016 · 1 comment

Atry commented Aug 23, 2016

@simulacrum.typeclass trait MyTypeClass[A] extends AnyRef {
  def opWithThisType(a: A)(implicit constrait: this.type <:< Product) = a
}

/private/tmp/thistype/MyTypeClass.scala:1: type mismatch;
 found   : <:<[Ops.this.type,Product]
 required: <:<[Ops.this.typeClassInstance.type,Product]
@simulacrum.typeclass trait MyTypeClass[A] extends AnyRef {
 ^

The text was updated successfully, but these errors were encountered:

Author

Atry commented Aug 23, 2016

I found a workaround:

@simulacrum.typeclass trait MyTypeClass[A] extends AnyRef { typeClassInstance =>
  def opWithThisType(a: A)(implicit constrait: typeClassInstance.type <:< Product) = a
}

Note the self type typeClassInstance =>

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment