Macro helix::codegen_define_method

macro_rules! codegen_define_method {
    ($def:tt, {
        type: class,
        rust_name: $cls_rust_name:tt,
        $($rest:tt)*
    }, {
        type: class_method,
        rust_name: $rust_name:tt,
        ruby_name: { $($ruby_name:tt)* },
        self: (),
        args: [ $($arg:tt : $argty:ty),* ],
        ret: { $($ret:tt)* },
        body: $body:tt
    }) => { ... };
    ($def:tt, {
        type: class,
        rust_name: $cls_rust_name:tt,
        ruby_name: $cls_ruby_name:tt,
        meta: $meta:tt,
        struct: $struct:tt,
        $($rest:tt)*
    }, {
        type: instance_method,
        rust_name: $rust_name:tt,
        ruby_name: { $($ruby_name:tt)* },
        self: { ownership: { $($ownership:tt)* }, name: $self:tt },
        args: [ $($arg:tt : $argty:ty),* ],
        ret: { $($ret:tt)* },
        body: $body:tt
    }) => { ... };
    ($def:tt, {
        type: class,
        rust_name: $cls_rust_name:tt,
        ruby_name: $cls_ruby_name:tt,
        meta: $meta:tt,
        struct: $struct:tt,
        $($rest:tt)*
    }, {
        type: initializer,
        rust_name: $rust_name:tt,
        ruby_name: { $($ruby_name:tt)* },
        self: { ownership: {}, name: $self:tt },
        args: [ $($arg:tt : $argty:ty),* ],
        ret: { $($ret:tt)* },
        body: $body:tt
    }) => { ... };
}