Attribute Macro target

#[target]

Define a trait for use of implement macro.

Arguments (all optional)

• alternative … Trait. If specified, implement this trait instead of the target trait itself. The target trait is used only for an argument of implement macro. See implementation of traits.

• newer_type … Set path to newer_type crate. Defaults to ::newer_type. Example: ::your_crate::_export::newer_type.

  Example

  use newer_type::target;
  
  #[target]
  trait MyTrait {
      fn my_fn(&self) -> ::core::primitive::usize;
  }

  use newer_type::target;
  type TypeFromContext = usize;
  #[target]
  trait MyTrait {
      fn my_fn(&self, t: TypeFromContext) -> Box<usize>;
  }