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|
/******************************** -*- C -*- ****************************
*
* GNU Smalltalk genbc tool - parser for implementations
*
***********************************************************************/
/***********************************************************************
*
* Copyright 2003, 2006 Free Software Foundation, Inc.
* Written by Paolo Bonzini.
*
* This file is part of GNU Smalltalk.
*
* GNU Smalltalk is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2, or (at your option) any later
* version.
*
* Linking GNU Smalltalk statically or dynamically with other modules is
* making a combined work based on GNU Smalltalk. Thus, the terms and
* conditions of the GNU General Public License cover the whole
* combination.
*
* In addition, as a special exception, the Free Software Foundation
* give you permission to combine GNU Smalltalk with free software
* programs or libraries that are released under the GNU LGPL and with
* independent programs running under the GNU Smalltalk virtual machine.
*
* You may copy and distribute such a system following the terms of the
* GNU GPL for GNU Smalltalk and the licenses of the other code
* concerned, provided that you include the source code of that other
* code when and as the GNU GPL requires distribution of source code.
*
* Note that people who make modified versions of GNU Smalltalk are not
* obligated to grant this special exception for their modified
* versions; it is their choice whether to do so. The GNU General
* Public License gives permission to release a modified version without
* this exception; this exception also makes it possible to release a
* modified version which carries forward this exception.
*
* GNU Smalltalk is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* GNU Smalltalk; see the file COPYING. If not, write to the Free Software
* Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
***********************************************************************/
/* This parser looks for matchers into the C source files, and uses the
code in the C source file to create the macros that are pasted after the
decision tree. */
%{
#include "genbc.h"
#define yyparse impl_yyparse
#define yydebug impl_yydebug
#define YYERROR_VERBOSE
#define YYPRINT yyprint
char *current_id;
%}
%debug
%defines
%union {
struct field_info *field;
const char *ctext;
char *text;
int num;
}
%token MATCH_BYTECODES "MATCH_BYTECODES"
%token DECL_BEGIN "BEGIN"
%token DECL_END "END"
%token DECL_BREAK "break"
%token DECL_CONTINUE "continue"
%token DECL_DISPATCH "dispatch"
%token DECL_EXTRACT "extract"
%token DECL_DOTS ".."
%token<num> NUMBER "number"
%token<text> ID "identifier"
%token<text> EXPR "expression"
%%
program:
program matcher
| /* empty */
;
matcher:
MATCH_BYTECODES '(' ID ',' ID ',' '('
{
current_id = $3;
printf ("\n");
#if 0
printf ("/* %s:%d */\n", current_file, yylineno);
#endif
printf ("#define MATCH_BYTECODES_%s \\\n", $3);
}
cases ')' ')'
{
free ($3);
printf ("\n");
};
cases:
case
| cases { printf (" \\\n"); } case
;
case:
ids EXPR
{
printf (" %s \\\n"
" goto MATCH_BYTECODES_SWITCH_%s;",
$2, current_id);
free ($2);
};
ids:
ids ',' id
| id
;
id:
ID
{
printf (" MATCH_BYTECODES_%s_%s: \\\n", current_id, $1);
free ($1);
};
%%
|
