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Java Source Code / Java Documentation » Parser » Rats Parser Generators » xtc.parser 
Source Cross Reference  Class Diagram Java Document (Java Doc) 


java.lang.Object
   xtc.tree.Visitor
      xtc.parser.Checker

Checker
public class Checker extends Visitor (Code)
Visitor to check a grammar for consistency. This visitor should be applied on a grammar right after parsing, before any other visitors.
author:
   Robert Grimm
version:
   $Revision: 1.1 $


Field Summary
final protected  Analyzeranalyzer
     The analyzer utility.
protected  booleanerror
     Flag for whether we have seen an error.
protected  booleanpredicate
     Flag for whether we are currently processing a predicate.
protected  String[]source
     The source file, one line per array entry.

Constructor Summary
public  Checker(Analyzer analyzer)
     Create a new checker.

Method Summary
protected  voidmsg(String msg, Node n)
     Print the specified error message.
public  Booleanvisit(Grammar g)
     Analyze the specified grammar.
public  voidvisit(Production p)
     Analyze the specified production.
public  voidvisit(OrderedChoice c)
     Analyze the specified ordered choice.
public  voidvisit(Repetition r)
     Analyze the specified repetition.
public  voidvisit(Option o)
     Analyze the specified option.
public  voidvisit(Sequence s)
     Analyze the specified sequence.
public  voidvisit(Predicate p)
     Analyze the specified predicate.
public  voidvisit(SemanticPredicate p)
     Analyze the specified semantic predicate.
public  voidvisit(Binding b)
     Analyze the specified binding.
public  voidvisit(StringMatch m)
     Analyze the specified string match.
public  voidvisit(NonTerminal nt)
     Analyze the specified nonterminal.
public  voidvisit(Terminal t)
     Analyze the specified terminal.
public  voidvisit(StringLiteral l)
     Analyze the specified string literal.
public  voidvisit(CharClass c)
     Analyze the specified character class.
public  voidvisit(Action a)
     Analyze the specified action.
public  voidvisit(InternalElement e)
     Analyze the specified internal element.

Field Detail
analyzer
final protected Analyzer analyzer(Code)
The analyzer utility.



error
protected boolean error(Code)
Flag for whether we have seen an error.



predicate
protected boolean predicate(Code)
Flag for whether we are currently processing a predicate.



source
protected String[] source(Code)
The source file, one line per array entry.




Constructor Detail
Checker
public Checker(Analyzer analyzer)(Code)
Create a new checker.
Parameters:
  analyzer - The analyzer utility for the new checker.




Method Detail
msg
protected void msg(String msg, Node n)(Code)
Print the specified error message. Calling this method also sets the error flag.
Parameters:
  msg - The error message.
Parameters:
  n - The offending node.



visit
public Boolean visit(Grammar g)(Code)
Analyze the specified grammar. This method returns a boolean flag indicating whether the grammar contains errors.



visit
public void visit(Production p)(Code)
Analyze the specified production.



visit
public void visit(OrderedChoice c)(Code)
Analyze the specified ordered choice.



visit
public void visit(Repetition r)(Code)
Analyze the specified repetition.



visit
public void visit(Option o)(Code)
Analyze the specified option.



visit
public void visit(Sequence s)(Code)
Analyze the specified sequence.



visit
public void visit(Predicate p)(Code)
Analyze the specified predicate.



visit
public void visit(SemanticPredicate p)(Code)
Analyze the specified semantic predicate.



visit
public void visit(Binding b)(Code)
Analyze the specified binding.



visit
public void visit(StringMatch m)(Code)
Analyze the specified string match.



visit
public void visit(NonTerminal nt)(Code)
Analyze the specified nonterminal.



visit
public void visit(Terminal t)(Code)
Analyze the specified terminal.



visit
public void visit(StringLiteral l)(Code)
Analyze the specified string literal.



visit
public void visit(CharClass c)(Code)
Analyze the specified character class.



visit
public void visit(Action a)(Code)
Analyze the specified action.



visit
public void visit(InternalElement e)(Code)
Analyze the specified internal element.



Methods inherited from xtc.tree.Visitor
public Object dispatch(Node node)(Code)(Java Doc)

Methods inherited from java.lang.Object
native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc)
public boolean equals(Object obj)(Code)(Java Doc)
protected void finalize() throws Throwable(Code)(Java Doc)
final native public Class getClass()(Code)(Java Doc)
native public int hashCode()(Code)(Java Doc)
final native public void notify()(Code)(Java Doc)
final native public void notifyAll()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc)
final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc)
final public void wait() throws InterruptedException(Code)(Java Doc)

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