openjava.syntax
Class SeparatedListRule

java.lang.Object
  |
  +--openjava.syntax.AbstractSyntaxRule
        |
        +--openjava.syntax.SeparatedListRule

All Implemented Interfaces:

SyntaxRule, TokenID

Direct Known Subclasses:

DefaultListRule, ExpressionListRule

public abstract class SeparatedListRule

extends AbstractSyntaxRule

The class SeparatedListRule represents the syntax rule of a list separated by an separator.

Suppose there's a syntax rule A and token t. This class can represents the syntax A ( t A )*.

Since:

%SOFTWARE% 1.0

Version:

1.0

Author:

Michiaki Tatsubori

See Also:

Object

Field Summary

private boolean	allowsEmpty
private SyntaxRule	elementRule
private int	separator

Fields inherited from class openjava.syntax.AbstractSyntaxRule

Fields inherited from interface openjava.syntax.TokenID

ABSTRACT, ANDASSIGN, ASSIGN, BANG, BIT_AND, BIT_OR, BOOLEAN, BREAK, BYTE, CASE, CATCH, CHAR, CHARACTER_LITERAL, CLASS, COLON, COMMA, CONDITIONAL_AND, CONDITIONAL_OR, CONTINUE, DECREMENT, DEFAULT, DO, DOT, DOUBLE, DOUBLE_LITERAL, ELSE, EOF, EQUAL, EXTENDS, FALSE, FINAL, FINALLY, FLOAT, FLOAT_LITERAL, FOR, GREATER, GREATER_EQUAL, HOOK, IDENTIFIER, IF, IMPLEMENTS, IMPORT, INCREMENT, INSTANCEOF, INSTANTIATES, INT, INTEGER_LITERAL, INTERFACE, LBRACE, LBRACKET, LESS, LESS_EQUAL, LONG, LONG_LITERAL, LPAREN, LSHIFT, LSHIFTASSIGN, METACLASS, MINUS, MINUSASSIGN, NATIVE, NEW, NOT_EQUAL, NULL, ORASSIGN, PACKAGE, PLUS, PLUSASSIGN, PRIVATE, PROTECTED, PUBLIC, RBRACE, RBRACKET, REM, REMASSIGN, RETURN, RPAREN, RSIGNEDSHIFT, RSIGNEDSHIFTASSIGN, RUNSIGNEDSHIFT, RUNSIGNEDSHIFTASSIGN, SEMICOLON, SHORT, SLASH, SLASHASSIGN, STAR, STARASSIGN, STATIC, STRING_LITERAL, SUPER, SWITCH, SYNCHRONIZED, THIS, THROW, THROWS, TILDE, TRANSIENT, TRUE, TRY, VOID, VOLATILE, WHILE, XOR, XORASSIGN

Constructor Summary

SeparatedListRule(SyntaxRule elementRule, int separator_token)
Allocates a new rule representing a list of a give rule separeted by a given separator.

SeparatedListRule(SyntaxRule elementRule, int separator_token, boolean allowsEmpty)
Allocates a new rule representing a list of a give rule separeted by a given separator.

Method Summary

protected abstract void	addListElement(Object elem)
ParseTree	consume(TokenSource token_src) Consumes token source.
private ParseTree	consumeSepAndElem(TokenSource token_src)
protected abstract ParseTree	getList()
protected abstract void	initList()

Methods inherited from class openjava.syntax.AbstractSyntaxRule

getSyntaxException, lookahead

Methods inherited from class java.lang.Object

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

Field Detail

elementRule

private SyntaxRule elementRule

separator

private int separator

allowsEmpty

private boolean allowsEmpty

Constructor Detail

SeparatedListRule

public SeparatedListRule(SyntaxRule elementRule,
                         int separator_token,
                         boolean allowsEmpty)

Allocates a new rule representing a list of a give rule separeted by a given separator.

Parameters:

elementRule - a rule of each element of the list

separator_token - the id of a token to be separator

See Also:

TokenID

SeparatedListRule

public SeparatedListRule(SyntaxRule elementRule,
                         int separator_token)

Allocates a new rule representing a list of a give rule separeted by a given separator.

Parameters:

elementRule - a rule of each element of the list

separator_token - the id of a token to be separator

See Also:

TokenID

Method Detail

initList

protected abstract void initList()

addListElement

protected abstract void addListElement(Object elem)

getList

protected abstract ParseTree getList()

consume

public final ParseTree consume(TokenSource token_src)
                        throws SyntaxException

Consumes token source.

Specified by:

consume in interface SyntaxRule

Specified by:

consume in class AbstractSyntaxRule

Parameters:

token_src - token source.

Returns:

null if this fails to consume a syntax tree represented by this object. Otherwise it returns ObjectList object.

SyntaxException

consumeSepAndElem

private ParseTree consumeSepAndElem(TokenSource token_src)
                             throws SyntaxException

SyntaxException