Macro generate_bindings 

macro_rules! generate_bindings {
    (
        $binding_type:ident;
        $(
            $input_kind:tt$(::$button:ident)?
            $(,$input_modifiers:expr)*
            $(,+$terminal_mode_include:expr)*
            $(,~$terminal_mode_exclude:expr)*
            ;$action:expr
        );*
        $(;)*
    ) => { ... };
}