• Subclass improvements:
  • Allow subclassing of C++ classes in namespaces.
  • Support arbitrary constructors for superclasses.
  • Simplify subclass default traits.
  • Some rejigging of the directives/macro names. Breaking change but only if you already used the subclass support.
  • Allow unit structs to be subclasses.
• Improve specificity of error messages around missing dependencies.
• Provide the option to suppress system headers.
• Provide an autodiscovery mode which attempts to spot use of ffi:: to avoid any allowlist at all.
• Provide #[extern_rust_fun] and #[extern_rust_type] attribute macros to allow exporting of arbitrary Rust code to C++.
• Bump bindgen version.
• Make compatible with resolver = 2.
• Breaking change Deprecated some of the builder methods and replaced them with, err, a Builder builder.