auto_impl 1.3.0

Automatically implement traits for common smart pointers and closures
Documentation 
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error[E0277]: the size for values of type `dyn Trait` cannot be known at compilation time
  --> tests/compile-fail/trait_obj_value_self.rs:12:19
   |
12 |     assert_impl::<Box<dyn Trait>>();
   |                   ^^^^^^^^^^^^^^ doesn't have a size known at compile-time
   |
   = help: the trait `Sized` is not implemented for `dyn Trait`
   = help: the trait `Trait` is implemented for `Box<T>`
note: required for `Box<dyn Trait>` to implement `Trait`
  --> tests/compile-fail/trait_obj_value_self.rs:4:1
   |
4  | #[auto_impl(Box)]
   | ^^^^^^^^^^^^^^^^^
5  | trait Trait {
   |       ^^^^^
note: required by a bound in `assert_impl`
  --> tests/compile-fail/trait_obj_value_self.rs:9:19
   |
9  | fn assert_impl<T: Trait>() {}
   |                   ^^^^^ required by this bound in `assert_impl`
   = note: this error originates in the attribute macro `auto_impl` (in Nightly builds, run with -Z macro-backtrace for more info)