src/scan-action.l

   1 /* Scan User Actions.                                       -*- C -*-
   2    Copyright (C) 2002  Free Software Foundation, Inc.
   3
   4    This file is part of Bison, the GNU Compiler Compiler.
   5
   6    Bison is free software; you can redistribute it and/or modify it
   7    under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2, or (at your option)
   9    any later version.
  10
  11    Bison is distributed in the hope that it will be useful, but
  12    WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with Bison; see the file COPYING.  If not, write to the Free
  18    Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  19    02111-1307, USA.  */
  20
  21 %option nodefault noyywrap nounput
  22 %option prefix="action_" outfile="lex.yy.c"
  23
  24 %{
  25 #include "system.h"
  26 #include "files.h"
  27 int skel_lex (void);
  28 static int yylineno = 1;
  29 %}
  30
  31 %x DOLLAR
  32
  33 ID   [a-zA-Z]+
  34 NUM  -?[0-9]+
  35
  36 %%
  37 $(-?[0-9])+  { fprintf (action_out, "yylsp[%s]", yytext + 1) ;}
  38 @(-?[0-9])+  { fprintf (action_out, "yylsp[%s]", yytext + 1) ;}
  39 $<{ID}       { action_type = xstrndup (yytext + 2, yyleng - 2); BEGIN DOLLAR;}
  40 $            { BEGIN DOLLAR;}
  41
  42 <DOLLAR>
  43 {
  44   {NUM}>   { fprintf (action_out, "yyvsp[%s]", NUM }
  45 }
  46 %%