Macro helix::codegen_method

macro_rules! codegen_method {
    {
        {
            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:block
        }
    } => { ... };
    {
        {
            type: class_method,
            rust_name: $rust_name:tt,
            ruby_name: $ruby_name:tt,
            self: (),
            args: [ $($args:tt)* ],
            ret: { $($ret:tt)* },
            body: $body:block
        }
    } => { ... };
    {
        {
            type: instance_method,
            rust_name: $rust_name:tt,
            ruby_name: $ruby_name:tt,
            self: {
                ownership: { $($ownership:tt)* },
                name: $self:tt
            },
            args: [ $($args:tt)* ],
            ret: { $($ret:tt)* },
            body: $body:block
        }
    } => { ... };
}