openjava.syntax
Class SelectionRule

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

All Implemented Interfaces:

SyntaxRule, TokenID

public class SelectionRule

extends AbstractSyntaxRule

The class SelectionRule represents selective syntax rule.

Suppose there're several syntax rules; A, B, C. This class can represents the syntax ( A | B | C ). If both A and B are adaptable to token source, A is choosed since A is specified at lefter part than B's part.

Since:

%SOFTWARE% 1.0

Version:

1.0

Author:

Michiaki Tatsubori

See Also:

Object

Field Summary

protected SyntaxRule[]

elementRules

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

SelectionRule(SyntaxRule[] elementRules)
Allocates a new rule representing a selection of given rules.

SelectionRule(SyntaxRule e1, SyntaxRule e2)

SelectionRule(SyntaxRule e1, SyntaxRule e2, SyntaxRule e3)

Method Summary

ParseTree

consume(TokenSource token_src) Consumes tokens from the given token source following the rule.

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

elementRules

protected SyntaxRule[] elementRules

Constructor Detail

SelectionRule

public SelectionRule(SyntaxRule[] elementRules)

Allocates a new rule representing a selection of given rules.

Parameters:

elementRules - an array of rules

SelectionRule

public SelectionRule(SyntaxRule e1,
                     SyntaxRule e2)

SelectionRule

public SelectionRule(SyntaxRule e1,
                     SyntaxRule e2,
                     SyntaxRule e3)

Method Detail

consume

public ParseTree consume(TokenSource token_src)
                  throws SyntaxException

Description copied from class: AbstractSyntaxRule

Consumes tokens from the given token source following the rule. To be overridden.

Specified by:

consume in interface SyntaxRule

Specified by:

consume in class AbstractSyntaxRule

Parameters:

token_src - token source to consume.

Returns:

a parse tree object consumed by following this rule.

SyntaxException