org.antlr.v4.codegen.model

Class ElementFrequenciesVisitor

java.lang.Object

org.antlr.runtime.BaseRecognizer

org.antlr.runtime.tree.TreeParser

org.antlr.v4.parse.GrammarTreeVisitor

org.antlr.v4.codegen.model.ElementFrequenciesVisitor

public class ElementFrequenciesVisitor
extends GrammarTreeVisitor

Nested Class Summary

Nested classes/interfaces inherited from class org.antlr.v4.parse.GrammarTreeVisitor

GrammarTreeVisitor.action_return, GrammarTreeVisitor.actionElement_return, GrammarTreeVisitor.alternative_return, GrammarTreeVisitor.astOperand_return, GrammarTreeVisitor.atom_return, GrammarTreeVisitor.block_return, GrammarTreeVisitor.blockSet_return, GrammarTreeVisitor.blockSuffix_return, GrammarTreeVisitor.channelSpec_return, GrammarTreeVisitor.channelsSpec_return, GrammarTreeVisitor.delegateGrammar_return, GrammarTreeVisitor.delegateGrammars_return, GrammarTreeVisitor.DFA38, GrammarTreeVisitor.ebnfSuffix_return, GrammarTreeVisitor.element_return, GrammarTreeVisitor.elementOption_return, GrammarTreeVisitor.elementOptions_return, GrammarTreeVisitor.exceptionGroup_return, GrammarTreeVisitor.exceptionHandler_return, GrammarTreeVisitor.finallyClause_return, GrammarTreeVisitor.grammarSpec_return, GrammarTreeVisitor.labeledElement_return, GrammarTreeVisitor.labeledLexerElement_return, GrammarTreeVisitor.lexerAlternative_return, GrammarTreeVisitor.lexerAtom_return, GrammarTreeVisitor.lexerBlock_return, GrammarTreeVisitor.lexerCommand_return, GrammarTreeVisitor.lexerCommandExpr_return, GrammarTreeVisitor.lexerElement_return, GrammarTreeVisitor.lexerElements_return, GrammarTreeVisitor.lexerOuterAlternative_return, GrammarTreeVisitor.lexerRule_return, GrammarTreeVisitor.lexerRuleBlock_return, GrammarTreeVisitor.lexerSubrule_return, GrammarTreeVisitor.locals_return, GrammarTreeVisitor.mode_return, GrammarTreeVisitor.option_return, GrammarTreeVisitor.optionsSpec_return, GrammarTreeVisitor.optionValue_return, GrammarTreeVisitor.outerAlternative_return, GrammarTreeVisitor.prequelConstruct_return, GrammarTreeVisitor.prequelConstructs_return, GrammarTreeVisitor.range_return, GrammarTreeVisitor.rule_return, GrammarTreeVisitor.ruleAction_return, GrammarTreeVisitor.ruleBlock_return, GrammarTreeVisitor.ruleModifier_return, GrammarTreeVisitor.ruleref_return, GrammarTreeVisitor.ruleReturns_return, GrammarTreeVisitor.rules_return, GrammarTreeVisitor.setElement_return, GrammarTreeVisitor.subrule_return, GrammarTreeVisitor.terminal_return, GrammarTreeVisitor.throwsSpec_return, GrammarTreeVisitor.tokenSpec_return, GrammarTreeVisitor.tokensSpec_return

Field Summary

Fields

Modifier and Type	Field and Description
(package private) java.util.Deque<FrequencySet<java.lang.String>>	frequencies
private java.util.Deque<FrequencySet<java.lang.String>>	minFrequencies
private static FrequencySet<java.lang.String>	SENTINEL This special value means "no set", and is used by minFrequencies to ensure that combineMin(org.antlr.v4.misc.FrequencySet<java.lang.String>, org.antlr.v4.misc.FrequencySet<java.lang.String>) doesn't merge an empty set (all zeros) with the results of the first alternative.

Fields inherited from class org.antlr.v4.parse.GrammarTreeVisitor

ACTION, ACTION_CHAR_LITERAL, ACTION_ESC, ACTION_STRING_LITERAL, ALT, ALTLIST, ARG, ARG_ACTION, ARG_OR_CHARSET, ARGLIST, ASSIGN, AT, BLOCK, CATCH, CHANNELS, CHAR_RANGE, CLOSURE, COLON, COLONCOLON, COMBINED, COMMA, COMMENT, currentModeName, currentOuterAltNumber, currentOuterAltRoot, currentRuleAST, currentRuleName, dfa38, DOC_COMMENT, DOLLAR, DOT, ELEMENT_OPTIONS, EOF, EPSILON, ERRCHAR, ESC_SEQ, FINALLY, FOLLOW_ACTION_in_action596, FOLLOW_ACTION_in_actionElement1716, FOLLOW_ACTION_in_actionElement1724, FOLLOW_ACTION_in_block2467, FOLLOW_ACTION_in_element1905, FOLLOW_ACTION_in_element1934, FOLLOW_ACTION_in_elementOption2770, FOLLOW_ACTION_in_exceptionHandler990, FOLLOW_ACTION_in_finallyClause1017, FOLLOW_ACTION_in_lexerElement1465, FOLLOW_ACTION_in_lexerElement1494, FOLLOW_action_in_prequelConstruct234, FOLLOW_ACTION_in_ruleAction1131, FOLLOW_ALT_in_alternative1767, FOLLOW_ALT_in_alternative1780, FOLLOW_ALT_in_lexerElements1420, FOLLOW_alternative_in_block2470, FOLLOW_alternative_in_outerAlternative1354, FOLLOW_ARG_ACTION_in_exceptionHandler988, FOLLOW_ARG_ACTION_in_locals1047, FOLLOW_ARG_ACTION_in_rule809, FOLLOW_ARG_ACTION_in_ruleref2504, FOLLOW_ARG_ACTION_in_ruleReturns1072, FOLLOW_ASSIGN_in_delegateGrammar420, FOLLOW_ASSIGN_in_elementOption2720, FOLLOW_ASSIGN_in_elementOption2744, FOLLOW_ASSIGN_in_elementOption2764, FOLLOW_ASSIGN_in_elementOption2786, FOLLOW_ASSIGN_in_option295, FOLLOW_AT_in_action585, FOLLOW_AT_in_ruleAction1127, FOLLOW_atom_in_astOperand1996, FOLLOW_atom_in_element1893, FOLLOW_block_in_astOperand2013, FOLLOW_BLOCK_in_block2459, FOLLOW_block_in_element1974, FOLLOW_block_in_labeledLexerElement1555, FOLLOW_BLOCK_in_lexerBlock1580, FOLLOW_BLOCK_in_lexerRuleBlock1209, FOLLOW_BLOCK_in_ruleBlock1273, FOLLOW_block_in_subrule2071, FOLLOW_block_in_subrule2078, FOLLOW_blockSet_in_astOperand2004, FOLLOW_blockSet_in_atom2262, FOLLOW_blockSet_in_element1965, FOLLOW_blockSet_in_lexerAtom1629, FOLLOW_blockSet_in_lexerAtom1640, FOLLOW_blockSuffix_in_lexerSubrule2103, FOLLOW_blockSuffix_in_subrule2069, FOLLOW_CATCH_in_exceptionHandler986, FOLLOW_CHANNELS_in_channelsSpec532, FOLLOW_channelSpec_in_channelsSpec534, FOLLOW_channelsSpec_in_prequelConstruct224, FOLLOW_delegateGrammar_in_delegateGrammars391, FOLLOW_delegateGrammars_in_prequelConstruct204, FOLLOW_DOT_in_atom2200, FOLLOW_DOT_in_atom2211, FOLLOW_ebnfSuffix_in_blockSuffix2139, FOLLOW_element_in_alternative1772, FOLLOW_element_in_labeledElement2044, FOLLOW_ELEMENT_OPTIONS_in_elementOptions2667, FOLLOW_elementOption_in_elementOptions2669, FOLLOW_elementOptions_in_actionElement1726, FOLLOW_elementOptions_in_actionElement1744, FOLLOW_elementOptions_in_alternative1769, FOLLOW_elementOptions_in_alternative1782, FOLLOW_elementOptions_in_atom2227, FOLLOW_elementOptions_in_element1936, FOLLOW_elementOptions_in_element1949, FOLLOW_elementOptions_in_lexerAtom1653, FOLLOW_elementOptions_in_lexerElement1496, FOLLOW_elementOptions_in_lexerElement1509, FOLLOW_elementOptions_in_ruleref2507, FOLLOW_elementOptions_in_setElement2325, FOLLOW_elementOptions_in_setElement2339, FOLLOW_elementOptions_in_terminal2580, FOLLOW_elementOptions_in_terminal2619, FOLLOW_EPSILON_in_alternative1785, FOLLOW_EPSILON_in_lexerElement1517, FOLLOW_exceptionGroup_in_rule910, FOLLOW_exceptionHandler_in_exceptionGroup957, FOLLOW_FINALLY_in_finallyClause1015, FOLLOW_finallyClause_in_exceptionGroup960, FOLLOW_FRAGMENT_in_lexerRule712, FOLLOW_GRAMMAR_in_grammarSpec85, FOLLOW_ID_in_action589, FOLLOW_ID_in_action594, FOLLOW_ID_in_atom2202, FOLLOW_ID_in_atom2213, FOLLOW_ID_in_channelSpec557, FOLLOW_ID_in_delegateGrammar424, FOLLOW_ID_in_delegateGrammar428, FOLLOW_ID_in_delegateGrammar443, FOLLOW_ID_in_elementOption2700, FOLLOW_ID_in_elementOption2724, FOLLOW_ID_in_elementOption2728, FOLLOW_ID_in_elementOption2746, FOLLOW_ID_in_elementOption2766, FOLLOW_ID_in_elementOption2788, FOLLOW_ID_in_grammarSpec87, FOLLOW_ID_in_labeledElement2042, FOLLOW_ID_in_labeledLexerElement1550, FOLLOW_ID_in_lexerCommand1813, FOLLOW_ID_in_lexerCommand1831, FOLLOW_ID_in_mode664, FOLLOW_ID_in_option297, FOLLOW_ID_in_ruleAction1129, FOLLOW_ID_in_throwsSpec1100, FOLLOW_ID_in_tokenSpec502, FOLLOW_IMPORT_in_delegateGrammars389, FOLLOW_INT_in_elementOption2792, FOLLOW_labeledElement_in_element1888, FOLLOW_labeledLexerElement_in_lexerElement1448, FOLLOW_LEXER_ACTION_CALL_in_lexerCommand1811, FOLLOW_LEXER_ALT_ACTION_in_lexerAlternative1376, FOLLOW_LEXER_CHAR_SET_in_lexerAtom1672, FOLLOW_LEXER_CHAR_SET_in_setElement2434, FOLLOW_lexerAlternative_in_lexerBlock1585, FOLLOW_lexerAlternative_in_lexerOuterAlternative1332, FOLLOW_lexerAtom_in_labeledLexerElement1553, FOLLOW_lexerAtom_in_lexerElement1453, FOLLOW_lexerBlock_in_lexerSubrule2105, FOLLOW_lexerBlock_in_lexerSubrule2112, FOLLOW_lexerCommand_in_lexerAlternative1380, FOLLOW_lexerCommandExpr_in_lexerCommand1815, FOLLOW_lexerElement_in_lexerElements1422, FOLLOW_lexerElements_in_lexerAlternative1378, FOLLOW_lexerElements_in_lexerAlternative1392, FOLLOW_lexerOuterAlternative_in_lexerRuleBlock1228, FOLLOW_lexerRule_in_mode668, FOLLOW_lexerRule_in_rules631, FOLLOW_lexerRuleBlock_in_lexerRule737, FOLLOW_lexerSubrule_in_lexerElement1458, FOLLOW_LOCALS_in_locals1045, FOLLOW_locals_in_rule848, FOLLOW_mode_in_grammarSpec125, FOLLOW_MODE_in_mode662, FOLLOW_NOT_in_astOperand2002, FOLLOW_NOT_in_astOperand2011, FOLLOW_NOT_in_element1963, FOLLOW_NOT_in_element1972, FOLLOW_NOT_in_lexerAtom1627, FOLLOW_option_in_optionsSpec261, FOLLOW_OPTIONS_in_optionsSpec259, FOLLOW_optionsSpec_in_block2461, FOLLOW_optionsSpec_in_lexerBlock1582, FOLLOW_optionsSpec_in_prequelConstruct194, FOLLOW_optionsSpec_in_rule863, FOLLOW_optionValue_in_option301, FOLLOW_outerAlternative_in_ruleBlock1292, FOLLOW_prequelConstruct_in_prequelConstructs167, FOLLOW_prequelConstructs_in_grammarSpec106, FOLLOW_range_in_element1957, FOLLOW_range_in_lexerAtom1682, FOLLOW_RANGE_in_range2544, FOLLOW_RANGE_in_setElement2403, FOLLOW_RETURNS_in_ruleReturns1070, FOLLOW_RULE_in_lexerRule694, FOLLOW_RULE_in_rule782, FOLLOW_rule_in_rules629, FOLLOW_RULE_REF_in_rule784, FOLLOW_RULE_REF_in_ruleref2500, FOLLOW_ruleAction_in_block2464, FOLLOW_ruleAction_in_rule877, FOLLOW_ruleBlock_in_rule908, FOLLOW_ruleModifier_in_rule798, FOLLOW_RULEMODIFIERS_in_lexerRule708, FOLLOW_RULEMODIFIERS_in_rule793, FOLLOW_ruleref_in_atom2215, FOLLOW_ruleref_in_atom2272, FOLLOW_ruleref_in_lexerAtom1692, FOLLOW_ruleReturns_in_rule822, FOLLOW_rules_in_grammarSpec123, FOLLOW_RULES_in_rules624, FOLLOW_SEMPRED_in_actionElement1734, FOLLOW_SEMPRED_in_actionElement1742, FOLLOW_SEMPRED_in_element1919, FOLLOW_SEMPRED_in_element1947, FOLLOW_SEMPRED_in_lexerElement1479, FOLLOW_SEMPRED_in_lexerElement1507, FOLLOW_SET_in_blockSet2297, FOLLOW_set_in_labeledElement2036, FOLLOW_set_in_labeledLexerElement1544, FOLLOW_setElement_in_blockSet2299, FOLLOW_STRING_LITERAL_in_elementOption2750, FOLLOW_STRING_LITERAL_in_range2546, FOLLOW_STRING_LITERAL_in_range2548, FOLLOW_STRING_LITERAL_in_setElement2323, FOLLOW_STRING_LITERAL_in_setElement2349, FOLLOW_STRING_LITERAL_in_setElement2407, FOLLOW_STRING_LITERAL_in_setElement2411, FOLLOW_STRING_LITERAL_in_terminal2578, FOLLOW_STRING_LITERAL_in_terminal2603, FOLLOW_subrule_in_element1898, FOLLOW_terminal_in_atom2204, FOLLOW_terminal_in_atom2254, FOLLOW_terminal_in_lexerAtom1616, FOLLOW_THROWS_in_throwsSpec1098, FOLLOW_throwsSpec_in_rule835, FOLLOW_TOKEN_REF_in_lexerRule696, FOLLOW_TOKEN_REF_in_setElement2337, FOLLOW_TOKEN_REF_in_setElement2374, FOLLOW_TOKEN_REF_in_terminal2617, FOLLOW_TOKEN_REF_in_terminal2630, FOLLOW_TOKENS_SPEC_in_tokensSpec477, FOLLOW_tokenSpec_in_tokensSpec479, FOLLOW_tokensSpec_in_prequelConstruct214, FOLLOW_WILDCARD_in_atom2225, FOLLOW_WILDCARD_in_atom2238, FOLLOW_WILDCARD_in_lexerAtom1651, FOLLOW_WILDCARD_in_lexerAtom1664, FRAGMENT, GRAMMAR, grammarName, GT, HEX_DIGIT, ID, IMPORT, INITACTION, INT, LABEL, LEXER, LEXER_ACTION_CALL, LEXER_ALT_ACTION, LEXER_CHAR_SET, LIST, LOCALS, LPAREN, LT, MODE, NameChar, NameStartChar, NESTED_ACTION, NLCHARS, NOT, OPTIONAL, OPTIONS, OR, PARSER, PLUS, PLUS_ASSIGN, POSITIVE_CLOSURE, POUND, PREC_RULE, PRIVATE, PROTECTED, PUBLIC, QUESTION, RANGE, RARROW, RBRACE, RESULT, RET, RETURNS, rewriteEBNFLevel, RPAREN, RULE, RULE_REF, RULEACTIONS, RULEMODIFIERS, RULES, SEMI, SEMPRED, SET, SRC, STAR, STRING_LITERAL, SYNPRED, TEMPLATE, THROWS, TOKEN_REF, tokenNames, TOKENS_SPEC, TREE_GRAMMAR, UNICODE_ESC, UNICODE_EXTENDED_ESC, UnicodeBOM, WILDCARD, WS, WSCHARS, WSNLCHARS

Fields inherited from class org.antlr.runtime.tree.TreeParser

DOWN, input, UP

Fields inherited from class org.antlr.runtime.BaseRecognizer

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

Constructor Summary

Constructors

Constructor and Description
ElementFrequenciesVisitor(org.antlr.runtime.tree.TreeNodeStream input)

Method Summary

Modifier and Type	Method and Description
protected static FrequencySet<java.lang.String>	combineAndClip(FrequencySet<java.lang.String> a, FrequencySet<java.lang.String> b, int clip) Generate a frequency set as the union of two input sets, with the values clipped to a specified maximum value.
protected static FrequencySet<java.lang.String>	combineMax(FrequencySet<java.lang.String> a, FrequencySet<java.lang.String> b) Generate a frequency set as the union of two input sets.
protected static FrequencySet<java.lang.String>	combineMin(FrequencySet<java.lang.String> a, FrequencySet<java.lang.String> b) Generate a frequency set as the union of two input sets.
protected void	enterAlternative(AltAST tree)
protected void	enterBlockSet(GrammarAST tree)
protected void	enterElement(GrammarAST tree)
protected void	enterLexerAlternative(GrammarAST tree)
protected void	enterLexerElement(GrammarAST tree)
protected void	exitAlternative(AltAST tree)
protected void	exitBlockSet(GrammarAST tree)
protected void	exitElement(GrammarAST tree)
protected void	exitLexerAlternative(GrammarAST tree)
protected void	exitLexerElement(GrammarAST tree)
protected void	exitLexerSubrule(GrammarAST tree)
protected void	exitSubrule(GrammarAST tree)
ErrorManager	getErrorManager() During code gen, we can assume tree is in good shape
(package private) FrequencySet<java.lang.String>	getMinFrequencies()
void	ruleRef(GrammarAST ref, ActionAST arg)
void	stringRef(TerminalAST ref)
void	tokenRef(TerminalAST ref)

Methods inherited from class org.antlr.v4.parse.GrammarTreeVisitor

action, actionElement, actionInAlt, alternative, astOperand, atom, block, blockOption, blockSet, blockSuffix, channelSpec, channelsSpec, defineChannel, defineToken, delegateGrammar, delegateGrammars, discoverAlt, discoverGrammar, discoverLexerRule, discoverOuterAlt, discoverRule, discoverRules, ebnfSuffix, element, elementOption, elementOption, elementOptions, enterAction, enterActionElement, enterAstOperand, enterAtom, enterBlock, enterBlockSuffix, enterChannelSpec, enterChannelsSpec, enterDelegateGrammar, enterDelegateGrammars, enterEbnfSuffix, enterElementOption, enterElementOptions, enterExceptionGroup, enterExceptionHandler, enterFinallyClause, enterGrammarSpec, enterLabeledElement, enterLabeledLexerElement, enterLexerAtom, enterLexerBlock, enterLexerCommand, enterLexerCommandExpr, enterLexerElements, enterLexerOuterAlternative, enterLexerRule, enterLexerRuleBlock, enterLexerSubrule, enterLocals, enterMode, enterOption, enterOptionsSpec, enterOptionValue, enterOuterAlternative, enterPrequelConstruct, enterPrequelConstructs, enterRange, enterRule, enterRuleAction, enterRuleBlock, enterRuleModifier, enterRuleref, enterRuleReturns, enterRules, enterSetElement, enterSubrule, enterTerminal, enterThrowsSpec, enterTokenSpec, enterTokensSpec, exceptionGroup, exceptionHandler, exitAction, exitActionElement, exitAstOperand, exitAtom, exitBlock, exitBlockSuffix, exitChannelSpec, exitChannelsSpec, exitDelegateGrammar, exitDelegateGrammars, exitEbnfSuffix, exitElementOption, exitElementOptions, exitExceptionGroup, exitExceptionHandler, exitFinallyClause, exitGrammarSpec, exitLabeledElement, exitLabeledLexerElement, exitLexerAtom, exitLexerBlock, exitLexerCommand, exitLexerCommandExpr, exitLexerElements, exitLexerOuterAlternative, exitLexerRule, exitLexerRuleBlock, exitLocals, exitMode, exitOption, exitOptionsSpec, exitOptionValue, exitOuterAlternative, exitPrequelConstruct, exitPrequelConstructs, exitRange, exitRule, exitRuleAction, exitRuleBlock, exitRuleModifier, exitRuleref, exitRuleReturns, exitRules, exitSetElement, exitTerminal, exitThrowsSpec, exitTokenSpec, exitTokensSpec, finallyAction, finallyClause, finishAlt, finishGrammar, finishLexerRule, finishOuterAlt, finishPrequels, finishRule, finishRules, getDelegates, getGrammarFileName, getTokenNames, globalNamedAction, grammarOption, grammarSpec, importGrammar, label, labeledElement, labeledLexerElement, lexerAlternative, lexerAtom, lexerBlock, lexerCallCommand, lexerCommand, lexerCommand, lexerCommandExpr, lexerElement, lexerElements, lexerOuterAlternative, lexerRule, lexerRuleBlock, lexerSubrule, locals, mode, modeDef, option, optionsSpec, optionValue, outerAlternative, prequelConstruct, prequelConstructs, range, rule, ruleAction, ruleBlock, ruleCatch, ruleModifier, ruleOption, ruleref, ruleReturns, rules, sempredInAlt, setElement, subrule, terminal, throwsSpec, tokenSpec, tokensSpec, traceIn, traceOut, visit, visitGrammar, wildcardRef

Methods inherited from class org.antlr.runtime.tree.TreeParser

getAncestor, getCurrentInputSymbol, getErrorHeader, getErrorMessage, getMissingSymbol, getSourceName, getTreeNodeStream, inContext, inContext, matchAny, recoverFromMismatchedToken, reset, setTreeNodeStream

Methods inherited from class org.antlr.runtime.BaseRecognizer

alreadyParsedRule, beginResync, combineFollows, computeContextSensitiveRuleFOLLOW, computeErrorRecoverySet, consumeUntil, consumeUntil, displayRecognitionError, emitErrorMessage, endResync, failed, getBacktrackingLevel, getNumberOfSyntaxErrors, getRuleInvocationStack, getRuleInvocationStack, getRuleMemoization, getRuleMemoizationCacheSize, getTokenErrorDisplay, match, memoize, mismatchIsMissingToken, mismatchIsUnwantedToken, pushFollow, recover, recoverFromMismatchedSet, reportError, setBacktrackingLevel, toStrings, traceIn, traceOut

Methods inherited from class java.lang.Object

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

Field Detail

SENTINEL

private static final FrequencySet<java.lang.String> SENTINEL

This special value means "no set", and is used by minFrequencies to ensure that combineMin(org.antlr.v4.misc.FrequencySet<java.lang.String>, org.antlr.v4.misc.FrequencySet<java.lang.String>) doesn't merge an empty set (all zeros) with the results of the first alternative.

frequencies

final java.util.Deque<FrequencySet<java.lang.String>> frequencies

minFrequencies

private final java.util.Deque<FrequencySet<java.lang.String>> minFrequencies

Constructor Detail

ElementFrequenciesVisitor

public ElementFrequenciesVisitor(org.antlr.runtime.tree.TreeNodeStream input)

Method Detail

getMinFrequencies

FrequencySet<java.lang.String> getMinFrequencies()

getErrorManager

public ErrorManager getErrorManager()

During code gen, we can assume tree is in good shape

Overrides:

getErrorManager in class GrammarTreeVisitor

combineMax

protected static FrequencySet<java.lang.String> combineMax(FrequencySet<java.lang.String> a,
                                                           FrequencySet<java.lang.String> b)

Generate a frequency set as the union of two input sets. If an element is contained in both sets, the value for the output will be the maximum of the two input values.

Parameters:

a - The first set.

b - The second set.

Returns:

The union of the two sets, with the maximum value chosen whenever both sets contain the same key.

combineMin

protected static FrequencySet<java.lang.String> combineMin(FrequencySet<java.lang.String> a,
                                                           FrequencySet<java.lang.String> b)

Generate a frequency set as the union of two input sets. If an element is contained in both sets, the value for the output will be the minimum of the two input values.

Parameters:

a - The first set.

b - The second set. If this set is SENTINEL, it is treated as though no second set were provided.

Returns:

The union of the two sets, with the minimum value chosen whenever both sets contain the same key.

combineAndClip

protected static FrequencySet<java.lang.String> combineAndClip(FrequencySet<java.lang.String> a,
                                                               FrequencySet<java.lang.String> b,
                                                               int clip)

Generate a frequency set as the union of two input sets, with the values clipped to a specified maximum value. If an element is contained in both sets, the value for the output, prior to clipping, will be the sum of the two input values.

Parameters:

a - The first set.

b - The second set.

clip - The maximum value to allow for any output.

Returns:

The sum of the two sets, with the individual elements clipped to the maximum value given by clip.

tokenRef

public void tokenRef(TerminalAST ref)

Overrides:

tokenRef in class GrammarTreeVisitor

ruleRef

public void ruleRef(GrammarAST ref,
                    ActionAST arg)

Overrides:

ruleRef in class GrammarTreeVisitor

stringRef

public void stringRef(TerminalAST ref)

Overrides:

stringRef in class GrammarTreeVisitor

enterAlternative

protected void enterAlternative(AltAST tree)

Overrides:

enterAlternative in class GrammarTreeVisitor

exitAlternative

protected void exitAlternative(AltAST tree)

Overrides:

exitAlternative in class GrammarTreeVisitor

enterElement

protected void enterElement(GrammarAST tree)

Overrides:

enterElement in class GrammarTreeVisitor

exitElement

protected void exitElement(GrammarAST tree)

Overrides:

exitElement in class GrammarTreeVisitor

enterBlockSet

protected void enterBlockSet(GrammarAST tree)

Overrides:

enterBlockSet in class GrammarTreeVisitor

exitBlockSet

protected void exitBlockSet(GrammarAST tree)

Overrides:

exitBlockSet in class GrammarTreeVisitor

exitSubrule

protected void exitSubrule(GrammarAST tree)

Overrides:

exitSubrule in class GrammarTreeVisitor

enterLexerAlternative

protected void enterLexerAlternative(GrammarAST tree)

Overrides:

enterLexerAlternative in class GrammarTreeVisitor

exitLexerAlternative

protected void exitLexerAlternative(GrammarAST tree)

Overrides:

exitLexerAlternative in class GrammarTreeVisitor

enterLexerElement

protected void enterLexerElement(GrammarAST tree)

Overrides:

enterLexerElement in class GrammarTreeVisitor

exitLexerElement

protected void exitLexerElement(GrammarAST tree)

Overrides:

exitLexerElement in class GrammarTreeVisitor

exitLexerSubrule

protected void exitLexerSubrule(GrammarAST tree)

Overrides:

exitLexerSubrule in class GrammarTreeVisitor