| tex_token -> return lexbuf (expand_macro lexbuf)
| uri -> return lexbuf ("URI", Ulexing.utf8_lexeme lexbuf)
| eof -> return lexbuf ("EOI", "")
| tex_token -> return lexbuf (expand_macro lexbuf)
| uri -> return lexbuf ("URI", Ulexing.utf8_lexeme lexbuf)
| eof -> return lexbuf ("EOI", "")