Macro define_output_types

macro_rules! define_output_types {
    (
        $(
            $(#[doc = $doc:expr])*
            $Variant:ident => {
                shorthand: $shorthand:expr,
                extension: $extension:expr,
                description: $description:expr,
                default_filename: $default_filename:expr,
                is_text: $is_text:expr,
                compatible_with_cgus_and_single_output: $compatible:expr
            }
        ),* $(,)?
    ) => { ... };
}