Package com.singularsys.extensions.structure

Class ControlRule

java.lang.Object

com.singularsys.extensions.structure.ControlRule

All Implemented Interfaces:

GrammaticalRuleI, GrammarMatcher, Serializable

public class ControlRule
extends Object
implements GrammaticalRuleI

Parses break and continue statements

 <ControlRule> ::=
   | <word> <separator>
 

A successful parse returns a ControlNode

Author:

Richard Morris

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
ControlRule(SymbolToken word, SymbolToken separator, Object code)	Constructor.

Method Summary

Modifier and Type	Method	Description
void	init(Jep jep)	Delayed initialisation, this method is called whenever components of the jep instance are changed.
Node	match(Lookahead2Iterator<Token> it, GrammarParser parser)	Attempt to parse the input using the rule

Methods inherited from class java.lang.Object

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

Constructor Details

ControlRule

public ControlRule(SymbolToken word,
 SymbolToken separator,
 Object code)

Constructor.

Parameters:

word - token representing "break" or "continue"

separator - separator at end of

code - the control code to return

Method Details

match

public Node match(Lookahead2Iterator<Token> it,
 GrammarParser parser)

Description copied from interface: GrammaticalRuleI

Attempt to parse the input using the rule

Specified by:

match in interface GrammarMatcher

Specified by:

match in interface GrammaticalRuleI

Parameters:

it - iterator with tokens to parse

parser - the parser to parse any components of the rule

Returns:

successful parses should return a Node, null if unsuccessful

init

public void init(Jep jep)

Description copied from interface: GrammarMatcher

Delayed initialisation, this method is called whenever components of the jep instance are changed.

Specified by:

init in interface GrammarMatcher

Parameters:

jep - the current jep instance.