antlr
Class DefaultToolErrorHandler

java.lang.Object
  |
  +--antlr.DefaultToolErrorHandler

All Implemented Interfaces:

ToolErrorHandler

class DefaultToolErrorHandler

extends Object

implements ToolErrorHandler

Field Summary

(package private) CharFormatter

javaCharFormatter

Constructor Summary

(package private)

DefaultToolErrorHandler()

Method Summary

private void	dumpSets(Grammar grammar, boolean lexicalAnalysis, int depth, Lookahead[] sets, String linePrefix) Dump token/character sets to System.out
void	warnAltAmbiguity(Grammar grammar, AlternativeBlock blk, boolean lexicalAnalysis, int depth, Lookahead[] sets, int altIdx1, int altIdx2) Issue a warning about ambiguity between a alternates
void	warnAltExitAmbiguity(Grammar grammar, BlockWithImpliedExitPath blk, boolean lexicalAnalysis, int depth, Lookahead[] sets, int altIdx) Issue a warning about ambiguity between an alternate and exit path.

Methods inherited from class java.lang.Object

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

Field Detail

javaCharFormatter

CharFormatter javaCharFormatter

Constructor Detail

DefaultToolErrorHandler

DefaultToolErrorHandler()

Method Detail

dumpSets

private void dumpSets(Grammar grammar,
                      boolean lexicalAnalysis,
                      int depth,
                      Lookahead[] sets,
                      String linePrefix)

Dump token/character sets to System.out

Parameters:

lexicalAnalysis - true for lexical rule

depth - The depth of the ambiguity

sets - An array of bitsets containing the ambiguities

warnAltAmbiguity

public void warnAltAmbiguity(Grammar grammar,
                             AlternativeBlock blk,
                             boolean lexicalAnalysis,
                             int depth,
                             Lookahead[] sets,
                             int altIdx1,
                             int altIdx2)

Issue a warning about ambiguity between a alternates

Specified by:

warnAltAmbiguity in interface ToolErrorHandler

Parameters:

blk - The block being analyzed

lexicalAnalysis - true for lexical rule

depth - The depth of the ambiguity

sets - An array of bitsets containing the ambiguities

altIdx1 - The zero-based index of the first ambiguous alternative

altIdx2 - The zero-based index of the second ambiguous alternative

warnAltExitAmbiguity

public void warnAltExitAmbiguity(Grammar grammar,
                                 BlockWithImpliedExitPath blk,
                                 boolean lexicalAnalysis,
                                 int depth,
                                 Lookahead[] sets,
                                 int altIdx)

Issue a warning about ambiguity between an alternate and exit path.

Specified by:

warnAltExitAmbiguity in interface ToolErrorHandler

Parameters:

blk - The block being analyzed

lexicalAnalysis - true for lexical rule

depth - The depth of the ambiguity

sets - An array of bitsets containing the ambiguities

altIdx - The zero-based index of the ambiguous alternative