Package com.javacc.core

Class Expansion

java.lang.Object
com.javacc.parser.BaseNode
com.javacc.core.Expansion
All Implemented Interfaces:
JavaCCConstants, Node, freemarker.template.TemplateHashModel, freemarker.template.TemplateModel, freemarker.template.TemplateNodeModel, freemarker.template.TemplateScalarModel, Comparable<Node>
Direct Known Subclasses:
AttemptBlock, EmptyExpansion, ExpansionChoice, ExpansionSequence, ExpansionWithParentheses, NonTerminal, RegularExpression, TryBlock
public abstract class Expansion extends BaseNode
Describes expansions - entities that may occur on the right hand sides of productions. This is the base class of a bunch of other more specific classes.

  • Field Details

    • firstSet

      protected TokenSet firstSet

  • Constructor Details

    • Expansion

      public Expansion(Grammar grammar)

    • Expansion

      public Expansion()

  • Method Details

    • getIndex

      public int getIndex()

    • getContainingProduction

      public BNFProduction getContainingProduction()

    • getLabel

      public String getLabel()

    • setLabel

      public void setLabel(String label)

    • isTolerantParsing

      public boolean isTolerantParsing()
      If we hit a parsing error in this expansion, do we try to recover? This is only used in fault-tolerant mode, of course!

    • setTolerantParsing

      public void setTolerantParsing(boolean tolerantParsing)

    • toString

      public String toString()
      Overrides:
      toString in class BaseNode

    • getNestedExpansion

      public Expansion getNestedExpansion()

    • getIsRegexp

      public boolean getIsRegexp()

    • getTreeNodeBehavior

      public TreeBuildingAnnotation getTreeNodeBehavior()

    • setTreeNodeBehavior

      public void setTreeNodeBehavior(TreeBuildingAnnotation treeNodeBehavior)

    • isAtChoicePoint

      public boolean isAtChoicePoint()

    • getNonSuperfluousParent

      public Node getNonSuperfluousParent()
      Returns:
      the first ancestor that is not (directly) inside superfluous parentheses. (Yes, this is a bit hairy and I'm not 100% sure it's correct!) I really need to take a good look at all this handling of expansions inside parentheses.

    • getSpecifiedLexicalState

      public String getSpecifiedLexicalState()
      Returns:
      the lexical state to switch into to parse this expansion.

    • getTokenActivation

      public TokenActivation getTokenActivation()

    • getCustomErrorRecoveryBlock

      public CodeBlock getCustomErrorRecoveryBlock()

    • setCustomErrorRecoveryBlock

      public void setCustomErrorRecoveryBlock(CodeBlock customErrorRecoveryBlock)

    • superfluousParentheses

      public final boolean superfluousParentheses()
      Is this expansion superfluous parentheses?

    • beginsSequence

      public boolean beginsSequence()

    • isInsideLookahead

      public boolean isInsideLookahead()

    • getLookahead

      public Lookahead getLookahead()

    • getHasExplicitLookahead

      public boolean getHasExplicitLookahead()

    • getHasExplicitNumericalLookahead

      public boolean getHasExplicitNumericalLookahead()

    • getHasSeparateSyntacticLookahead

      public boolean getHasSeparateSyntacticLookahead()
      Does this expansion have a separate lookahead expansion?

    • getHasImplicitSyntacticLookahead

      public boolean getHasImplicitSyntacticLookahead()
      Do we do a syntactic lookahead using this expansion itself as the lookahead expansion?

    • isScanLimit

      public boolean isScanLimit()

    • setScanLimit

      public void setScanLimit(boolean scanLimit)

    • getScanLimitPlus

      public int getScanLimitPlus()

    • setScanLimitPlus

      public void setScanLimitPlus(int scanLimitPlus)

    • getRequiresScanAhead

      public boolean getRequiresScanAhead()

    • getRequiresPredicateMethod

      public final boolean getRequiresPredicateMethod()

    • getLookaheadExpansion

      public Expansion getLookaheadExpansion()

    • isAlwaysSuccessful

      public boolean isAlwaysSuccessful()

    • getHasGlobalSemanticActions

      public boolean getHasGlobalSemanticActions()

    • getLookaheadAmount

      public int getLookaheadAmount()

    • getHasSemanticLookahead

      public boolean getHasSemanticLookahead()

    • getHasScanLimit

      public boolean getHasScanLimit()

    • getHasInnerScanLimit

      public boolean getHasInnerScanLimit()

    • getUpToExpansion

      public Expansion getUpToExpansion()

    • getSemanticLookahead

      public Expression getSemanticLookahead()

    • getHasLookBehind

      public boolean getHasLookBehind()

    • getLookBehind

      public LookBehind getLookBehind()

    • isNegated

      public boolean isNegated()

    • getFirstSetVarName

      public String getFirstSetVarName()

    • getFinalSetVarName

      public String getFinalSetVarName()

    • getFollowSetVarName

      public String getFollowSetVarName()

    • getScanRoutineName

      public String getScanRoutineName()

    • getPredicateMethodName

      public String getPredicateMethodName()

    • getRecoverMethodName

      public String getRecoverMethodName()

    • getRecoverToMethodName

      public String getRecoverToMethodName()

    • getFinalSetSize

      public int getFinalSetSize()

    • getFirstSet

      public abstract TokenSet getFirstSet()

    • getFinalSet

      public abstract TokenSet getFinalSet()

    • getHasFullFollowSet

      public boolean getHasFullFollowSet()

    • getSpecifiesLexicalStateSwitch

      public boolean getSpecifiesLexicalStateSwitch()

    • getHasTokenActivation

      public boolean getHasTokenActivation()

    • isPossiblyEmpty

      public abstract boolean isPossiblyEmpty()
      Returns:
      Can this expansion be matched by the empty string.

    • isSingleToken

      public final boolean isSingleToken()
      Returns:
      whether this Expansion is always matched by exactly one token AND there is no funny business like lexical state switches a FAIL or an up-to-here marker

    • getMinimumSize

      public abstract int getMinimumSize()
      Returns:
      the minimum number of tokens that this expansion consumes.

    • getMaximumSize

      public abstract int getMaximumSize()
      Returns:
      the maximum number of tokens that this expansion consumes.

    • getFollowingExpansion

      public Expansion getFollowingExpansion()

    • getFollowSet

      public TokenSet getFollowSet()

    • isBeforeLexicalStateSwitch

      public Boolean isBeforeLexicalStateSwitch()

    • getRequiresRecoverMethod

      public boolean getRequiresRecoverMethod()