foreign-types

• Upgraded syn to 2.0.

• Support closures for drop and clone functions.

• Improve documentation

• The ForeignType and ForeignTypeRef traits are now unsafe.
• The syntax of the foreign_type! macro has changed slightly to require an unsafe keyword before the type name.

• Opaque is now both !Send and !Sync.
• from_ptr constructors have a debug assert that the pointer is non-null.
• Generated ForeignType structs now use NonNull<T> rather than *mut T.
• Generated ForeignType structs are now #[repr(transparent)].
• The foreign_type! macro now uses a different syntax. It supports definition of multiple types per macro invocation, and automatically creates the reference type name. It also supports lifetime and type parameters on generated foreign types.
• Generated code is now no-std compatible.

• Ensure licenses are present in releases.

• Split out types/traits to a separate crate so they can be versioned separately from the macro.

• Split out types/traits to a separate crate so they can be versioned separately from the macro.

• Implement Borrow and AsRef.
• Support Clone implementations.
• Support attributes on impl blocks.

• Add ForeignType::as_ptr.

Initial release