Class ActionAnalysis

java.lang.Object

org.antlr.runtime.BaseRecognizer

org.antlr.runtime.Lexer

org.antlr.grammar.v3.ActionAnalysis

All Implemented Interfaces:

TokenSource

public class ActionAnalysis
extends Lexer

We need to set Rule.referencedPredefinedRuleAttributes before code generation. This filter looks at an action in context of its rule and outer alternative number and figures out which rules have predefined prefs referenced. I need this so I can remove unusued labels. This also tracks, for labeled rules, which are referenced by actions.

Field Summary

Fields

Modifier and Type	Field	Description
(package private) Token	actionToken
(package private) Rule	enclosingRule
static final int	EOF
(package private) Grammar	grammar
static final int	ID
(package private) int	outerAltNum
static final int	X
static final int	X_Y
static final int	Y

Fields inherited from class Lexer

input

Fields inherited from class BaseRecognizer

DEFAULT_TOKEN_CHANNEL, HIDDEN, INITIAL_FOLLOW_STACK_SIZE, MEMO_RULE_FAILED, MEMO_RULE_UNKNOWN, NEXT_TOKEN_RULE_NAME, state

Constructor Summary

Constructors

Constructor	Description
ActionAnalysis()
ActionAnalysis(CharStream input)
ActionAnalysis(CharStream input, RecognizerSharedState state)
ActionAnalysis(Grammar grammar, String ruleName, GrammarAST actionAST)

Method Summary

Modifier and Type	Method	Description
boolean	alreadyParsedRule(IntStream input, int ruleIndex)	Has this rule already parsed input at the current index in the input stream? Return the stop token index or MEMO_RULE_UNKNOWN.
void	analyze()
Lexer[]	getDelegates()
String	getGrammarFileName()	For debugging and other purposes, might want the grammar name.
void	memoize(IntStream input, int ruleIndex, int ruleStartIndex)	Record whether or not this rule parsed the input at this position successfully.
final void	mID()
void	mTokens()	This is the lexer entry point that sets instance var 'token'
final void	mX()
final void	mX_Y()
final void	mY()
Token	nextToken()	Return a token from this source; i.e., match a token on the char stream.
final boolean	synpred1_ActionAnalysis()
final void	synpred1_ActionAnalysis_fragment()
final boolean	synpred2_ActionAnalysis()
final void	synpred2_ActionAnalysis_fragment()

Methods inherited from class Lexer

emit, emit, getCharErrorDisplay, getCharIndex, getCharPositionInLine, getCharStream, getEOFToken, getErrorMessage, getLine, getSourceName, getText, match, match, matchAny, matchRange, recover, reportError, reset, setCharStream, setText, skip, traceIn, traceOut

Methods inherited from class BaseRecognizer

beginResync, combineFollows, computeContextSensitiveRuleFOLLOW, computeErrorRecoverySet, consumeUntil, consumeUntil, displayRecognitionError, emitErrorMessage, endResync, failed, getBacktrackingLevel, getCurrentInputSymbol, getErrorHeader, getMissingSymbol, getNumberOfSyntaxErrors, getRuleInvocationStack, getRuleInvocationStack, getRuleMemoization, getRuleMemoizationCacheSize, getTokenErrorDisplay, getTokenNames, match, matchAny, mismatchIsMissingToken, mismatchIsUnwantedToken, pushFollow, recover, recoverFromMismatchedSet, recoverFromMismatchedToken, setBacktrackingLevel, toStrings, traceIn, traceOut

Methods inherited from class Object

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

Field Details

EOF

public static final int EOF

See Also:

• Constant Field Values

ID

public static final int ID

See Also:

• Constant Field Values

X

public static final int X

See Also:

• Constant Field Values

X_Y

public static final int X_Y

See Also:

• Constant Field Values

Y

public static final int Y

See Also:

• Constant Field Values

enclosingRule

Rule enclosingRule

grammar

Grammar grammar

actionToken

Token actionToken

outerAltNum

int outerAltNum

Constructor Details

ActionAnalysis

public ActionAnalysis(Grammar grammar,
 String ruleName,
 GrammarAST actionAST)

ActionAnalysis

public ActionAnalysis()

ActionAnalysis

public ActionAnalysis(CharStream input)

ActionAnalysis

public ActionAnalysis(CharStream input,
 RecognizerSharedState state)

Method Details

analyze

public void analyze()

getDelegates

public Lexer[] getDelegates()

getGrammarFileName

public String getGrammarFileName()

Description copied from class: BaseRecognizer

For debugging and other purposes, might want the grammar name. Have ANTLR generate an implementation for this method.

Overrides:

getGrammarFileName in class BaseRecognizer

nextToken

public Token nextToken()

Description copied from class: Lexer

Return a token from this source; i.e., match a token on the char stream.

Specified by:

nextToken in interface TokenSource

Overrides:

nextToken in class Lexer

memoize

public void memoize(IntStream input,
 int ruleIndex,
 int ruleStartIndex)

Description copied from class: BaseRecognizer

Record whether or not this rule parsed the input at this position successfully. Use a standard java hashtable for now.

Overrides:

memoize in class BaseRecognizer

alreadyParsedRule

public boolean alreadyParsedRule(IntStream input,
 int ruleIndex)

Description copied from class: BaseRecognizer

Has this rule already parsed input at the current index in the input stream? Return the stop token index or MEMO_RULE_UNKNOWN. If we attempted but failed to parse properly before, return MEMO_RULE_FAILED. This method has a side-effect: if we have seen this input for this rule and successfully parsed before, then seek ahead to 1 past the stop token matched for this rule last time.

Overrides:

alreadyParsedRule in class BaseRecognizer

mX_Y

public final void mX_Y()
                throws RecognitionException

Throws:

RecognitionException

mX

public final void mX()
              throws RecognitionException

Throws:

RecognitionException

mY

public final void mY()
              throws RecognitionException

Throws:

RecognitionException

mID

public final void mID()
               throws RecognitionException

Throws:

RecognitionException

mTokens

public void mTokens()
             throws RecognitionException

Description copied from class: Lexer

This is the lexer entry point that sets instance var 'token'

Specified by:

mTokens in class Lexer

Throws:

RecognitionException

synpred1_ActionAnalysis_fragment

public final void synpred1_ActionAnalysis_fragment()
                                            throws RecognitionException

Throws:

RecognitionException

synpred2_ActionAnalysis_fragment

public final void synpred2_ActionAnalysis_fragment()
                                            throws RecognitionException

Throws:

RecognitionException

synpred2_ActionAnalysis

public final boolean synpred2_ActionAnalysis()

synpred1_ActionAnalysis

public final boolean synpred1_ActionAnalysis()