Macro kas_core::impl_scope

impl_scope!() { /* proc-macro */ }

Scope supporting impl Self and advanced attribute macros

This macro facilitates definition of a type (struct, enum or union) plus implementations via impl Self { .. } syntax: Self is expanded to the type’s name, including generics and bounds (as defined on the type).

Caveat: rustfmt can not yet format contents (see rustfmt#5254, rustfmt#5538).

See impl_tools::impl_scope for full documentation.

Special attribute macros

Additionally, impl_scope! supports special attribute macros evaluated within its scope:

• #[impl_default]: implement [Default] using field initializers (which are not legal syntax outside of impl_scope!)
• #[widget]: implement kas::Widget trait family

Note: matching these macros within impl_scope! does not use path resolution. Using #[impl_tools::impl_default] would resolve the variant of this macro which doesn’t support field initializers.