BlockRule (Jep with extensions API )

java.lang.Object
- com.singularsys.extensions.structure.BlockRule

All Implemented Interfaces:

GrammaticalRuleI, GrammarMatcher, java.io.Serializable
```
public class BlockRule
extends java.lang.Object
implements GrammaticalRuleI
```
Parse a statement block { sequence }. Equivalent to the production
```
 BlockRule ::=
        open statement close
 
```
Author:

Richard Morris

See Also:

Serialized Form

Constructor Summary

Constructors
Constructor Description

BlockRule(SymbolToken open, SequenceRule statement, SymbolToken close)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`init(Jep jep)`	Delayed initialisation, this methods 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 Detail
  - BlockRule
```
public BlockRule(SymbolToken open,
                 SequenceRule statement,
                 SymbolToken close)
```
    Parameters:
    
    open - opening bracket
    
    statement - rule to parse
    
    close - closing bracket
- Method Detail
  - match
```
public Node match(Lookahead2Iterator<Token> it,
                  GrammarParser parser)
           throws ParseException
```
    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
    
    Throws:
    
    ParseException - if there is a syntactical error
  - init
```
public void init(Jep jep)
```
    Description copied from interface: GrammarMatcher
    
    Delayed initialisation, this methods is called whenever components of the jep instance are changed.
    
    Specified by:
    
    init in interface GrammarMatcher
    
    Parameters:
    
    jep - the current jep instance.