org.antlr.v4.tool

Class LeftRecursiveRule

java.lang.Object

org.antlr.v4.tool.Rule

org.antlr.v4.tool.LeftRecursiveRule

All Implemented Interfaces:

AttributeResolver

public class LeftRecursiveRule
extends Rule

Field Summary

Fields

Modifier and Type	Field and Description
List<Pair<GrammarAST,String>>	leftRecursiveRuleRefLabels Did we delete any labels on direct left-recur refs? Points at ID of ^(= ID el)
OrderedHashMap<Integer,LeftRecursiveRuleAltInfo>	recOpAlts
List<LeftRecursiveRuleAltInfo>	recPrimaryAlts

Fields inherited from class org.antlr.v4.tool.Rule

actionIndex, actions, alt, args, ast, exceptions, finallyAction, g, index, isStartRule, locals, mode, modifiers, name, namedActions, numberOfAlts, predefinedRulePropertiesDict, retvals, validLexerCommands

Constructor Summary

Constructors

Constructor and Description
LeftRecursiveRule(Grammar g, String name, RuleAST ast)

Method Summary

Methods

Modifier and Type	Method and Description
List<Triple<Integer,AltAST,String>>	getAltLabels() Get -> labels from those alts we deleted for left-recursive rules.
int	getOriginalNumberOfAlts() Used for recursive rules (subclass), which have 1 alt, but many original alts
List<AltAST>	getUnlabeledAltASTs()
boolean	hasAltSpecificContexts()

Methods inherited from class org.antlr.v4.tool.Rule

defineActionInAlt, defineLexerAction, definePredicateInAlt, equals, getAnyLabelDef, getElementLabelDefs, getElementLabelNames, getPredefinedScope, getTokenRefs, hashCode, isFragment, resolveRetvalOrProperty, resolvesToAttributeDict, resolvesToLabel, resolvesToListLabel, resolvesToToken, resolveToAttribute, resolveToAttribute, resolveToRule, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

recPrimaryAlts

public List<LeftRecursiveRuleAltInfo> recPrimaryAlts

recOpAlts

public OrderedHashMap<Integer,LeftRecursiveRuleAltInfo> recOpAlts

leftRecursiveRuleRefLabels

public List<Pair<GrammarAST,String>> leftRecursiveRuleRefLabels

Did we delete any labels on direct left-recur refs? Points at ID of ^(= ID el)

Constructor Detail

LeftRecursiveRule

public LeftRecursiveRule(Grammar g,
                 String name,
                 RuleAST ast)

Method Detail

hasAltSpecificContexts

public boolean hasAltSpecificContexts()

Overrides:

hasAltSpecificContexts in class Rule

getOriginalNumberOfAlts

public int getOriginalNumberOfAlts()

Description copied from class: Rule

Used for recursive rules (subclass), which have 1 alt, but many original alts

Overrides:

getOriginalNumberOfAlts in class Rule

getUnlabeledAltASTs

public List<AltAST> getUnlabeledAltASTs()

Overrides:

getUnlabeledAltASTs in class Rule

getAltLabels

public List<Triple<Integer,AltAST,String>> getAltLabels()

Get -> labels from those alts we deleted for left-recursive rules.

Overrides:

getAltLabels in class Rule