Diff for /gforth/vmgen-ex/mini.y between versions 1.2 and 1.7

version 1.2, 2001/04/29 11:48:21 version 1.7, 2007/12/31 19:02:25
Line 1 Line 1
 /* front-end compiler for vmgen example  /* front-end compiler for vmgen example
   
   Copyright (C) 2001 Free Software Foundation, Inc.    Copyright (C) 2001,2002,2003,2007 Free Software Foundation, Inc.
   
   This file is part of Gforth.    This file is part of Gforth.
   
   Gforth is free software; you can redistribute it and/or    Gforth is free software; you can redistribute it and/or
   modify it under the terms of the GNU General Public License    modify it under the terms of the GNU General Public License
   as published by the Free Software Foundation; either version 2    as published by the Free Software Foundation, either version 3
   of the License, or (at your option) any later version.    of the License, or (at your option) any later version.
   
   This program is distributed in the hope that it will be useful,    This program is distributed in the hope that it will be useful,
Line 15 Line 15
   GNU General Public License for more details.    GNU General Public License for more details.
   
   You should have received a copy of the GNU General Public License    You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software    along with this program; if not, see http://www.gnu.org/licenses/.
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.  
 */  */
   
 /* I use yacc/bison here not because I think it's the best tool for  /* I use yacc/bison here not because I think it's the best tool for
Line 40  int vm_debug; Line 39  int vm_debug;
   
 void yyerror(char *s)  void yyerror(char *s)
 {  {
     fprintf (stderr, "%s: %d: %s\n", program_name, yylineno, s);  #if 1
     /* for pure flex call */
     fprintf(stderr, "%s: %s\n", program_name, s);
   #else
     /* lex or flex -l supports yylineno */
     fprintf (stderr, "%s: %d: %s\n", program_name, yylineno, s);
   #endif
 }  }
   
 #include "mini-gen.i"  #include "mini-gen.i"
Line 94  stats: stats stat ';' Line 99  stats: stats stat ';'
   
 stat: IF expr THEN { gen_zbranch(&vmcodep, 0); $<instp>$ = vmcodep; }  stat: IF expr THEN { gen_zbranch(&vmcodep, 0); $<instp>$ = vmcodep; }
       stats { $<instp>$ = $<instp>4; }         stats { $<instp>$ = $<instp>4; } 
       elsepart END IF { BB_BOUNDARY; $<instp>7[-1] = vmcodep; }        elsepart END IF { BB_BOUNDARY; $<instp>7[-1] = (Inst)vmcodep; }
     | WHILE   { BB_BOUNDARY; $<instp>$ = vmcodep; }       | WHILE   { BB_BOUNDARY; $<instp>$ = vmcodep; } 
       expr DO { gen_zbranch(&vmcodep, 0); $<instp>$ = vmcodep; }        expr DO { gen_zbranch(&vmcodep, 0); $<instp>$ = vmcodep; }
       stats END WHILE { gen_branch(&vmcodep, $<instp>2); $<instp>5[-1] = vmcodep; }        stats END WHILE { gen_branch(&vmcodep, $<instp>2); $<instp>5[-1] = (Inst)vmcodep; }
     | IDENT BECOMES expr        { gen_storelocal(&vmcodep,  var_offset($1)); }      | IDENT BECOMES expr        { gen_storelocal(&vmcodep,  var_offset($1)); }
     | PRINT expr                { gen_print(&vmcodep); }      | PRINT expr                { gen_print(&vmcodep); }
     | expr                      { gen_drop(&vmcodep); }      | expr                      { gen_drop(&vmcodep); }
     ;      ;
   
 elsepart: ELSE { gen_branch(&vmcodep, 0); $<instp>$ = vmcodep; $<instp>0[-1] = vmcodep; }  elsepart: ELSE { gen_branch(&vmcodep, 0); $<instp>$ = vmcodep; $<instp>0[-1] = (Inst)vmcodep; }
           stats { $$ = $<instp>2; }            stats { $$ = $<instp>2; }
         | { $$ = $<instp>0; }          | { $$ = $<instp>0; }
         ;          ;

Removed from v.1.2  
changed lines
  Added in v.1.7


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