57 lines
2.2 KiB
OCaml
57 lines
2.2 KiB
OCaml
(***********************************************************************)
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(* *)
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(* MLTk, Tcl/Tk interface of Objective Caml *)
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(* *)
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(* Francois Rouaix, Francois Pessaux, Jun Furuse and Pierre Weis *)
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(* projet Cristal, INRIA Rocquencourt *)
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(* Jacques Garrigue, Kyoto University RIMS *)
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(* *)
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(* Copyright 2002 Institut National de Recherche en Informatique et *)
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(* en Automatique and Kyoto University. All rights reserved. *)
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(* This file is distributed under the terms of the GNU Library *)
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(* General Public License, with the special exception on linking *)
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(* described in file ../LICENSE. *)
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(* *)
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(***********************************************************************)
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{
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open Ppyac
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exception Error of string
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let linenum = ref 1
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}
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let blank = [' ' '\013' '\009' '\012']
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let identchar =
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['A'-'Z' 'a'-'z' '_' '\192'-'\214' '\216'-'\246' '\248'-'\255' '\'' '0'-'9']
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let lowercase = ['a'-'z' '\223'-'\246' '\248'-'\255' '_']
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let uppercase = ['A'-'Z' '\192'-'\214' '\216'-'\222']
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rule token = parse
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blank + { token lexbuf }
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| "##" [' ' '\t']* { directive lexbuf }
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| ("#")? [^ '#' '\n']* '\n'? {
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begin
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let str = Lexing.lexeme lexbuf in
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if String.length str <> 0 && str.[String.length str - 1] = '\n' then
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begin
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incr linenum
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end;
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OTHER (str)
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end
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}
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| eof { EOF }
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and directive = parse
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| "ifdef" [' ' '\t']+ { IFDEF (ident lexbuf)}
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| "ifndef" [' ' '\t']+ { IFNDEF (ident lexbuf)}
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| "else" { ELSE }
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| "endif" { ENDIF }
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| "define" [' ' '\t']+* { DEFINE (ident lexbuf)}
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| "undef" [' ' '\t']+ { UNDEF (ident lexbuf)}
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| _ { raise (Error (Printf.sprintf "unknown directive at line %d" !linenum))}
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and ident = parse
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| lowercase identchar* | uppercase identchar*
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{ Lexing.lexeme lexbuf }
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| _ { raise (Error (Printf.sprintf "illegal identifier at line %d" !linenum)) }
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