pj
Class Rfc

java.lang.Object
  pj.Rfc

public class Rfc
extends Object

RFC-style grammar for pj.

Nested Class Summary

static class	Rfc.Scanner embedded pj scanner.
static interface	Rfc.yyActions interface between grammar and actions.
static class	Rfc.yyException thrown for irrecoverable syntax errors and stack overflow.
static interface	Rfc.yyInput must be implemented by a scanner object to supply input to the parser.

Field Summary

static int	__error
static int	Epilog
static int	Id
static int	LEFT
static int	Lex
static int	Lit
static int	Lit1
static int	Mac
static int	NONASSOC
static int	PACKAGE
static int	PREC
static int	RIGHT
static int	SCAN
static int	SCREEN
static int	SEP
static int	SKIP
static int	Sym
static int	TOKEN
protected Rfc.yyActions	yyAct current factory.
protected static short[]	yyCheck parser tables.
protected static short[]	yyDefRed parser tables.
protected static short[]	yyDgoto parser tables.
static int	yyErrorCode
protected static int	yyFinal number of final state.
protected static short[]	yyGindex parser tables.
protected static short[]	yyLen parser tables.
protected static short[]	yyLhs parser tables.
protected int	yyMax initial size and increment of the state/value stack [default 256].
protected static String[]	yyNames maps symbol value to printable name.
protected static short[]	yyRindex parser tables.
protected static short[]	yySindex parser tables.
protected static short[]	yyTable parser tables.

Constructor Summary

Rfc()

Method Summary

protected Object	yyDefault(Object first) executed at the beginning of a reduce action.
void	yyerror(String message) simplified error message.
void	yyerror(String message, String[] expected) (syntax) error message.
protected String[]	yyExpecting(int state) computes list of expected tokens on error by tracing the tables.
Object	yyparse(Rfc.yyInput yyLex) the generated parser.
Object	yyparse(Rfc.yyInput yyLex, Object yydebug) the generated parser, with debugging messages.
List	yyparse(Rfc.yyInput yyLex, Object yydebug, Rfc.yyActions yyAct) entry point for parser with trace.
List	yyparse(Rfc.yyInput yyLex, Rfc.yyActions yyAct) entry point for parser without trace.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

yyAct

protected Rfc.yyActions yyAct

current factory.

Epilog

public static final int Epilog

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Constant Field Values

Id

public static final int Id

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Constant Field Values

LEFT

public static final int LEFT

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Constant Field Values

Lex

public static final int Lex

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Constant Field Values

Lit

public static final int Lit

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Constant Field Values

Lit1

public static final int Lit1

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Constant Field Values

Mac

public static final int Mac

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Constant Field Values

NONASSOC

public static final int NONASSOC

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Constant Field Values

PACKAGE

public static final int PACKAGE

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Constant Field Values

PREC

public static final int PREC

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Constant Field Values

RIGHT

public static final int RIGHT

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Constant Field Values

SCAN

public static final int SCAN

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Constant Field Values

SCREEN

public static final int SCREEN

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Constant Field Values

SEP

public static final int SEP

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Constant Field Values

SKIP

public static final int SKIP

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Constant Field Values

Sym

public static final int Sym

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Constant Field Values

TOKEN

public static final int TOKEN

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Constant Field Values

__error

public static final int __error

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Constant Field Values

yyErrorCode

public static final int yyErrorCode

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Constant Field Values

yyFinal

protected static final int yyFinal

number of final state.

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Constant Field Values

yyLhs

protected static final short[] yyLhs

parser tables. Order is mandated by jay.

yyLen

protected static final short[] yyLen

parser tables. Order is mandated by jay.

yyDefRed

protected static final short[] yyDefRed

parser tables. Order is mandated by jay.

yyDgoto

protected static final short[] yyDgoto

parser tables. Order is mandated by jay.

yySindex

protected static final short[] yySindex

parser tables. Order is mandated by jay.

yyRindex

protected static final short[] yyRindex

parser tables. Order is mandated by jay.

yyGindex

protected static final short[] yyGindex

parser tables. Order is mandated by jay.

yyTable

protected static final short[] yyTable

parser tables. Order is mandated by jay.

yyCheck

protected static final short[] yyCheck

parser tables. Order is mandated by jay.

yyNames

protected static final String[] yyNames

maps symbol value to printable name.

See Also:

yyExpecting(int)

yyMax

protected int yyMax

initial size and increment of the state/value stack [default 256]. This is not final so that it can be overwritten outside of invocations of yyparse(pj.Rfc.yyInput, java.lang.Object, pj.Rfc.yyActions).

Constructor Detail

Rfc

public Rfc()

Method Detail

yyparse

public List yyparse(Rfc.yyInput yyLex,
                    Object yydebug,
                    Rfc.yyActions yyAct)
             throws IOException,
                    Rfc.yyException

entry point for parser with trace.

Throws:

IOException

Rfc.yyException

yyparse

public List yyparse(Rfc.yyInput yyLex,
                    Rfc.yyActions yyAct)
             throws IOException,
                    Rfc.yyException

entry point for parser without trace.

Throws:

IOException

Rfc.yyException

yyerror

public void yyerror(String message)

simplified error message.

See Also:

yyerror(java.lang.String, java.lang.String[])

yyerror

public void yyerror(String message,
                    String[] expected)

(syntax) error message. Can be overwritten to control message format.

Parameters:

message - text to be displayed.

expected - list of acceptable tokens, if available.

yyExpecting

protected String[] yyExpecting(int state)

computes list of expected tokens on error by tracing the tables.

Parameters:

state - for which to compute the list.

Returns:

list of token names.

yyparse

public Object yyparse(Rfc.yyInput yyLex,
                      Object yydebug)
               throws IOException,
                      Rfc.yyException

the generated parser, with debugging messages. Maintains a dynamic state and value stack.

Parameters:

yyLex - scanner.

yydebug - debug message writer implementing yyDebug, or null.

Returns:

result of the last reduction, if any.

Throws:

Rfc.yyException - on irrecoverable parse error.

IOException

yyDefault

protected Object yyDefault(Object first)

executed at the beginning of a reduce action. Used as $$ = yyDefault($1), prior to the user-specified action, if any. Can be overwritten to provide deep copy, etc.

Parameters:

first - value for $1, or null.

Returns:

first.

yyparse

public Object yyparse(Rfc.yyInput yyLex)
               throws IOException,
                      Rfc.yyException

the generated parser. Maintains a dynamic state and value stack.

Parameters:

yyLex - scanner.

Returns:

result of the last reduction, if any.

Throws:

Rfc.yyException - on irrecoverable parse error.

IOException