39 lines
1.0 KiB
OCaml
39 lines
1.0 KiB
OCaml
(* vim: set sw=8 ts=8 et: *)
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exception LexerException of string
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(* *)
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let lexer_token_safe lexbuf =
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try Lexer.token lexbuf
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with Failure s -> raise (LexerException s)
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(* *)
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let render tree =
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let outtex = Util.mapjoin Texutil.render_tex tree in
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begin
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print_string ("+" ^ outtex);
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end
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(* TODO: document
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* Arguments:
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* 1st : tex input string
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*
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* Output one character:
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* E : Lexer exception raised
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* F : TeX function not recognized
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* S : Parsing error
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* - : Generic/Default failure code. Might be an invalid argument,
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* output file already exist, a problem with an external
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* command ...
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*)
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let _ =
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try render (
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Parser.tex_expr lexer_token_safe (
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Lexing.from_string Sys.argv.(1))
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)
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with Parsing.Parse_error -> print_string "S"
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| LexerException _ -> print_string "E"
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| Texutil.Illegal_tex_function s -> print_string ("F" ^ s)
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| Invalid_argument _ -> print_string "-"
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| Failure _ -> print_string "-"
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| _ -> print_string "-"
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