0.4.0

• Pin projection has become a safe operation. In the absence of other unsafe code that you write, it is impossible to cause undefined behavior.

• #[unsafe_project] attribute has been replaced with #[pin_project] attribute. (#18, #33)

• The Unpin argument has been removed - an Unpin impl is now generated by default.

• Drop impls must be specified with #[pinned_drop] instead of via a normal Drop impl. (#18, #33, #86)

• Unpin impls must be specified with an impl of UnsafeUnpin, instead of implementing the normal Unpin trait.

• #[pin_project] attribute now determines the visibility of the projection type/method is based on the original type.

• #[pin_project] can now be used for public type with private field types.

• #[pin_project] can now interoperate with #[cfg()].

• Added project_ref method to #[pin_project] types.

• Added #[project_ref] attribute.

• Removed "project_attr" feature and always enable #[project] attribute.

• #[project] attribute can now be used for impl blocks.

• #[project] attribute can now be used for use statements.

• #[project] attribute now supports match expressions at the position of the initializer expression of let expressions.

Changes since the 0.4.0-beta.1 release:

• Fixed an issue that caused an error when using #[pin_project(UnsafeUnpin)] and not providing a manual UnsafeUnpin implementation on a type with no generics or lifetime.

0.4.0-beta.1

• Changed the argument type of project method back to self: Pin<&mut Self>.

• Removed "project_attr" feature and always enable #[project] attribute.

• Removed "renamed" feature.

• #[project] attribute can now be used for use statements.

• Added project_ref method and #[project_ref] attribute.

• #[pin_project] attribute now determines the visibility of the projection type/method is based on the original type.

0.4.0-alpha.11

• Changed #[pinned_drop] to trait implementation.

  #[pinned_drop]
  impl<T> PinnedDrop for Foo<'_, T> {
      fn drop(mut self: Pin<&mut Self>) {
          **self.project().was_dropped = true;
      }
  }

• Added some examples and generated code.

• Improve error messages.

0.4.0-alpha.10

• pin-project can now interoperate with #[cfg()].

• Improved documentation.

0.4.0-alpha.9

• Added 'project_into' method to #[pin_project] types. This can be useful when returning a pin projection from a method.

  fn get_pin_mut(self: Pin<&mut Self>) -> Pin<&mut T> {
      self.project_into().pinned
  }

• Prevented UnpinStruct from appearing in the document by default. See taiki-e/pin-project#71 for more details.

0.4.0-alpha.8

• Improved document of generated code.. Also added an option to control the document of generated code. See taiki-e/pin-project#62 for more details.

• Improved error messages

0.4.0-alpha.7

• Applied #[allow(dead_code)] to generated types.

0.4.0-alpha.6

• Allowed using #[pin_project] type with private field types

0.4.0-alpha.5

• #[project] attribute now supports match expressions at the position of the initializer expression of let expressions.

0.4.0-alpha.4

• Avoided clippy::drop_bounds lint in generated code.