m3tk/src/syn/M3CToken.m3

MODULE M3CToken;
************************************************************************* Copyright (C) Olivetti 1989 All Rights reserved Use and copy of this software and preparation of derivative works based upon this software are permitted to any person, provided this same copyright notice and the following Olivetti warranty disclaimer are included in any copy of the software or any modification thereof or derivative work therefrom made by any person. This software is made available AS IS and Olivetti disclaims all warranties with respect to this software, whether expressed or implied under any law, including all implied warranties of merchantibility and fitness for any purpose. In no event shall Olivetti be liable for any damages whatsoever resulting from loss of use, data or profits or otherwise arising out of or in connection with the use or performance of this software. ************************************************************************* 

IMPORT M3AST_LX;
An M3AST_LX.Token_rep is represented as a reference to the corresponding T value. 

REVEAL
  M3AST_LX.Token_rep = BRANDED REF T;

VAR
  table_g: ARRAY T OF M3AST_LX.Token_rep;

PROCEDURE Token_rep(t: T): M3AST_LX.Token_rep=
  BEGIN
    RETURN table_g[t];
  END Token_rep;

PROCEDURE Token_repToText(tr: M3AST_LX.Token_rep): TEXT=
  BEGIN
    WITH t = tr^, e = VAL(t, E) DO
      IF t IN ReservedWords THEN RETURN ReservedWordTexts[e]
      ELSIF t IN ReservedTokens THEN RETURN ReservedTokenTexts[e]
      ELSE <*ASSERT FALSE*>
      END
    END
  END Token_repToText;

BEGIN
  FOR i := FIRST(T) TO LAST(T) DO
    table_g[i] := NEW(M3AST_LX.Token_rep);
    table_g[i]^ := i;
  END;
END M3CToken.