Macro ascii_compatible_two_byte_decoder_functions 

macro_rules! ascii_compatible_two_byte_decoder_functions {
    (
        lead = $lead:block,
        trail = $trail:block,
        self = $slf:ident,
        non_ascii = $non_ascii:ident,
        byte = $byte:ident,
        lead_minus_offset = $lead_minus_offset:ident,
        unread_handle_trail = $unread_handle_trail:ident,
        source = $source:ident,
        handle = $handle:ident,
        outermost = $outermost:tt,
        copy_ascii = $copy_ascii:ident,
        destination_check = $destination_check:ident,
        ascii_punctuation = $ascii_punctuation:expr
    ) => { ... };
}