# Java skeleton for Bison -*- autoconf -*-
-# Copyright (C) 2007 Free Software Foundation, Inc.
+# Copyright (C) 2007, 2008, 2009 Free Software Foundation, Inc.
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
[])
m4_divert_push(0)dnl
-@output(b4_parser_file_name@)
+@output(b4_parser_file_name@)@
b4_copyright([Skeleton implementation for Bison LALR(1) parsers in Java],
- [2007])
+ [2007, 2008, 2009])
b4_percent_define_ifdef([package], [package b4_percent_define_get([package]);
])[/* First part of user declarations. */
]b4_pre_prologue
b4_percent_code_get([[imports]])
[/**
- * A Bison parser, automatically generated from <tt>@ofile@</tt>.
+ * A Bison parser, automatically generated from <tt>]m4_bpatsubst(b4_file_name, [^"\(.*\)"$], [\1])[</tt>.
*
* @@author LALR (1) parser skeleton written by Paolo Bonzini.
*/
-]b4_public_if([public ])b4_abstract_if([abstract ])[class ]b4_parser_class_name[
+]b4_public_if([public ])dnl
+b4_abstract_if([abstract ])dnl
+b4_final_if([final ])dnl
+b4_strictfp_if([strictfp ])dnl
+[class ]b4_parser_class_name[]dnl
+b4_percent_define_get3([extends], [ extends ])dnl
+b4_percent_define_get3([implements], [ implements ])[
{
]b4_identification[
public ]b4_position_type[ end;
/**
- * Create a ]b4_location_type[ denoting an empty range located at
+ * Create a <code>]b4_location_type[</code> denoting an empty range located at
* a given point.
* @@param loc The position at which the range is anchored. */
public ]b4_location_type[ (]b4_position_type[ loc) {
/**
* Create a <code>]b4_location_type[</code> from the endpoints of the range.
* @@param begin The first position included in the range.
- * @@param begin The first position beyond the range. */
+ * @@param end The first position beyond the range. */
public ]b4_location_type[ (]b4_position_type[ begin, ]b4_position_type[ end) {
this.begin = begin;
this.end = end;
return new ]b4_location_type[ (rhs.locationAt (1).begin, rhs.locationAt (n).end);
else
return new ]b4_location_type[ (rhs.locationAt (0).end);
- }]])
+ }]])[
/**
* Communication interface between the scanner and the Bison-generated
/**
* Method to retrieve the semantic value of the last scanned token.
* @@return the semantic value of the last scanned token. */
- ]b4_yystype[ getLVal ();]
+ ]b4_yystype[ getLVal ();
/**
* Entry point for the scanner. Returns the token identifier corresponding
- * to the next token and ]b4_pure_if([prepares to return], [stores])[
- * the semantic value]b4_locations_if([ and beginning/ending positions])[
- * of the token.
+ * to the next token and prepares to return the semantic value
+ * ]b4_locations_if([and beginning/ending positions ])[of the token.
* @@return the token identifier corresponding to the next token. */
int yylex () ]b4_maybe_throws([b4_lex_throws])[;
/**
* Entry point for error reporting. Emits an error
- * ]b4_locations_if([ referring to the given location])[in a user-defined
- * way.
+ * ]b4_locations_if([referring to the given location ])[in a user-defined way.
*
- * ]b4_locations_if([loc], [[The location of the element to which the
+ * ]b4_locations_if([[@@param loc The location of the element to which the
* error message is related]])[
* @@param s The string for the error message. */
void yyerror (]b4_locations_if([b4_location_type[ loc, ]])[String s);]
/**
* Instantiates the Bison-generated parser.
- * @@param yylex The scanner that will supply tokens to the parser.
+ * @@param yylexer The scanner that will supply tokens to the parser.
*/
b4_lexer_if([[protected]], [[public]]) b4_parser_class_name[ (]b4_parse_param_decl([[Lexer yylexer]])[) {
this.yylexer = yylexer;
]b4_locations_if([
protected final void yyerror (String s) {
- yylexer.yyerror ((Location)null, s);
+ yylexer.yyerror ((]b4_location_type[)null, s);
}
protected final void yyerror (]b4_position_type[ loc, String s) {
yylexer.yyerror (new ]b4_location_type[ (loc), s);
public int size = 16;
public int height = -1;
-
+
public final void push (int state, ]b4_yystype[ value]dnl
- b4_locations_if([, ]b4_location_type[ loc])[) {
+ b4_locations_if([, ]b4_location_type[ loc])[) {
height++;
- if (size == height)
+ if (size == height)
{
int[] newStateStack = new int[size * 2];
System.arraycopy (stateStack, 0, newStateStack, 0, height);
]b4_location_type[[] newLocStack = new ]b4_location_type[[size * 2];
System.arraycopy (locStack, 0, newLocStack, 0, height);
locStack = newLocStack;]])
-
+
b4_yystype[[] newValueStack = new ]b4_yystype[[size * 2];
System.arraycopy (valueStack, 0, newValueStack, 0, height);
valueStack = newValueStack;
public void print (java.io.PrintStream out)
{
out.print ("Stack now");
-
+
for (int i = 0; i < height; i++)
{
out.print (' ');
return yyerrstatus_ == 0;
}
- private int yyaction (int yyn, YYStack yystack, int yylen)
+ private int yyaction (int yyn, YYStack yystack, int yylen) ]b4_maybe_throws([b4_throws])[
{
]b4_yystype[ yyval;
]b4_locations_if([b4_location_type[ yyloc = yylloc (yystack, yylen);]])[
/* If YYLEN is nonzero, implement the default value of the action:
`$$ = $1'. Otherwise, use the top of the stack.
-
+
Otherwise, the following line sets YYVAL to garbage.
This behavior is undocumented and Bison
users should not rely upon it. */
yyval = yystack.valueAt (yylen - 1);
else
yyval = yystack.valueAt (0);
-
+
yy_reduce_print (yyn, yystack);
switch (yyn)
yycdebug (s + (yytype < yyntokens_ ? " token " : " nterm ")
+ yytname_[yytype] + " ("]b4_locations_if([
+ yylocationp + ": "])[
- + (yyvaluep == null ? "(null)" : yyvaluep) + ")");
+ + (yyvaluep == null ? "(null)" : yyvaluep.toString ()) + ")");
}
/**
* @@return <tt>true</tt> if the parsing succeeds. Note that this does not
* imply that there were no syntax errors.
*/
- public boolean parse () ]b4_maybe_throws([b4_throws])[
+ public boolean parse () ]b4_maybe_throws([b4_list2([b4_lex_throws], [b4_throws])])[
{
/// Lookahead and lookahead in internal form.
int yychar = yyempty_;
yycdebug ("Entering state " + yystate + "\n");
if (yydebug > 0)
yystack.print (yyDebugStream);
-
+
/* Accept? */
if (yystate == yyfinal_)
return true;
-
+
/* Take a decision. First try without lookahead. */
yyn = yypact_[yystate];
if (yyn == yypact_ninf_)
label = YYDEFAULT;
break;
}
-
+
/* Read a lookahead token. */
if (yychar == yyempty_)
{
yychar = yylex ();]
b4_locations_if([[
yylloc = new ]b4_location_type[(yylexer.getStartPos (),
- yylexer.getEndPos ());]])
+ yylexer.getEndPos ());]])
yylval = yylexer.getLVal ();[
}
-
+
/* Convert token to internal form. */
if (yychar <= EOF)
{
{
yytoken = yytranslate_ (yychar);
yy_symbol_print ("Next token is", yytoken,
- yylval]b4_locations_if([, yylloc])[);
+ yylval]b4_locations_if([, yylloc])[);
}
-
+
/* If the proper action on seeing token YYTOKEN is to reduce or to
detect an error, take that action. */
yyn += yytoken;
if (yyn < 0 || yylast_ < yyn || yycheck_[yyn] != yytoken)
label = YYDEFAULT;
-
+
/* <= 0 means reduce or error. */
else if ((yyn = yytable_[yyn]) <= 0)
{
label = YYREDUCE;
}
}
-
+
else
{
/* Shift the lookahead token. */
yy_symbol_print ("Shifting", yytoken,
- yylval]b4_locations_if([, yylloc])[);
-
+ yylval]b4_locations_if([, yylloc])[);
+
/* Discard the token being shifted. */
yychar = yyempty_;
-
+
/* Count tokens shifted since error; after three, turn off error
status. */
if (yyerrstatus_ > 0)
--yyerrstatus_;
-
+
yystate = yyn;
yystack.push (yystate, yylval]b4_locations_if([, yylloc])[);
label = YYNEWSTATE;
}
break;
-
+
/*-----------------------------------------------------------.
| yydefault -- do the default action for the current state. |
`-----------------------------------------------------------*/
else
label = YYREDUCE;
break;
-
+
/*-----------------------------.
| yyreduce -- Do a reduction. |
`-----------------------------*/
label = yyaction (yyn, yystack, yylen);
yystate = yystack.stateAt (0);
break;
-
+
/*------------------------------------.
| yyerrlab -- here on detecting error |
`------------------------------------*/
++yynerrs_;
yyerror (]b4_locations_if([yylloc, ])[yysyntax_error (yystate, yytoken));
}
-
+
]b4_locations_if([yyerrloc = yylloc;])[
if (yyerrstatus_ == 3)
{
/* If just tried and failed to reuse lookahead token after an
error, discard it. */
-
+
if (yychar <= EOF)
{
/* Return failure if at end of input. */
else
yychar = yyempty_;
}
-
+
/* Else will try to reuse lookahead token after shifting the error
token. */
label = YYERRLAB1;
break;
-
+
/*---------------------------------------------------.
| errorlab -- error raised explicitly by YYERROR. |
`---------------------------------------------------*/
case YYERROR:
-
+
]b4_locations_if([yyerrloc = yystack.locationAt (yylen - 1);])[
/* Do not reclaim the symbols of the rule which action triggered
this YYERROR. */
yystate = yystack.stateAt (0);
label = YYERRLAB1;
break;
-
+
/*-------------------------------------------------------------.
| yyerrlab1 -- common code for both syntax error and YYERROR. |
`-------------------------------------------------------------*/
case YYERRLAB1:
yyerrstatus_ = 3; /* Each real token shifted decrements this. */
-
+
for (;;)
{
yyn = yypact_[yystate];
break;
}
}
-
+
/* Pop the current state because it cannot handle the error token. */
if (yystack.height == 1)
return false;
-
+
]b4_locations_if([yyerrloc = yystack.locationAt (0);])[
yystack.pop ();
yystate = yystack.stateAt (0);
if (yydebug > 0)
yystack.print (yyDebugStream);
}
-
+
]b4_locations_if([
/* Muck with the stack to setup for yylloc. */
yystack.push (0, null, yylloc);
/* Shift the error token. */
yy_symbol_print ("Shifting", yystos_[yyn],
yylval]b4_locations_if([, yyloc])[);
-
+
yystate = yyn;
yystack.push (yyn, yylval]b4_locations_if([, yyloc])[);
label = YYNEWSTATE;
break;
-
+
/* Accept. */
case YYACCEPT:
return true;
-
+
/* Abort. */
case YYABORT:
return false;
StringBuffer res;
/* Start YYX at -YYN if negative to avoid negative indexes in
- YYCHECK. */
+ YYCHECK. In other words, skip the first -YYN actions for this
+ state because they are default actions. */
int yyxbegin = yyn < 0 ? -yyn : 0;
/* Stay within bounds of both yycheck and yytname. */
]b4_pact[
};
- /* YYDEFACT[S] -- default rule to reduce with in state S when YYTABLE
- doesn't specify something else to do. Zero means the default is an
- error. */
+ /* YYDEFACT[S] -- default reduction number in state S. Performed when
+ YYTABLE doesn't specify something else to do. Zero means the
+ default is an error. */
private static final ]b4_int_type_for([b4_defact])[ yydefact_[] =
{
]b4_defact[
for (int yyi = 0; yyi < yynrhs; yyi++)
yy_symbol_print (" $" + (yyi + 1) + " =",
yyrhs_[yyprhs_[yyrule] + yyi],
- ]b4_rhs_value(yynrhs, yyi + 1)b4_locations_if([,
+ ]b4_rhs_value(yynrhs, yyi + 1)b4_locations_if([,
b4_rhs_location(yynrhs, yyi + 1)])[);
}
projects / bison.git / blobdiff