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exception LexerException of string
let lexer_token_safe lexbuf =
try Lexer.token lexbuf
with Failure s -> raise (LexerException s)
let rec foo () =
try
let line = input_line stdin in
(try
let tree = Parser.tex_expr lexer_token_safe (Lexing.from_string line) in
(match Html.render tree with
Some _ -> print_string "$^\n"
| None -> print_string "$_\n";
)
with
Texutil.Illegal_tex_function s -> print_string ("$T" ^ s ^ " " ^ line ^ "\n")
| LexerException s -> print_string ("$L" ^ line ^ "\n")
| _ -> print_string ("$ " ^ line ^ "\n"));
flush stdout;
foo ();
with
End_of_file -> ()
;;
foo ();;