com.oracle.truffle.regex.tregex.parser.ast

Class Term

java.lang.Object

com.oracle.truffle.regex.tregex.parser.ast.RegexASTNode

com.oracle.truffle.regex.tregex.parser.ast.Term

All Implemented Interfaces:

IndexedState, JsonConvertible

Direct Known Subclasses:

BackReference, CharacterClass, Group, MatchFound, PositionAssertion, RegexASTSubtreeRootNode

public abstract class Term
extends RegexASTNode

A common supertype for all RegexASTNodes except Sequences.

Roughly corresponds to the goal symbol Term in the ECMAScript RegExp syntax. A Term (Term) can be either an Assertion (PositionAssertion or RegexASTSubtreeRootNode) or an Atom (CharacterClass, BackReference or Group). Quantifiers are handled by the Group.isLoop() flag of Groups.

Field Summary

Fields inherited from class com.oracle.truffle.regex.tregex.parser.ast.RegexASTNode

FLAG_CHARACTER_CLASS_WAS_SINGLE_CHAR, FLAG_EMPTY_GUARD, FLAG_GROUP_EXPANDED_QUANTIFIER, FLAG_GROUP_LOOP, FLAG_HAS_LOOPS, FLAG_LOOK_AROUND_NEGATED

Method Summary

Modifier and Type	Method and Description
abstract Term	copy(RegexAST ast, boolean recursive) Copy this node, in one of the following ways: if recursive is true, recursively copy this subtree.
boolean	equalsSemantic(RegexASTNode obj)
abstract boolean	equalsSemantic(RegexASTNode obj, boolean ignoreQuantifier)
Token.Quantifier	getQuantifier()
int	getSeqIndex()
RegexASTSubtreeRootNode	getSubTreeParent() Returns the subtree root node that this node is a part of.
boolean	hasQuantifier()
protected String	quantifierToString()
void	setQuantifier(Token.Quantifier quantifier)
void	setSeqIndex(int seqIndex)

Methods inherited from class com.oracle.truffle.regex.tregex.parser.ast.RegexASTNode

astNodeId, endsWithDollar, getId, getMaxPath, getMinPath, getParent, hasEmptyGuard, hasLoops, idInitialized, incMaxPath, incMaxPath, incMinPath, incMinPath, isDead, isFlagSet, isInLookAheadAssertion, isInLookBehindAssertion, isPrefix, markAsDead, setEmptyGuard, setEndsWithDollar, setEndsWithDollar, setFlag, setFlag, setHasLoops, setHasLoops, setId, setMaxPath, setMinPath, setParent, setPrefix, setStartsWithCaret, setStartsWithCaret, startsWithCaret, toJson, toStringWithID

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.oracle.truffle.regex.tregex.util.json.JsonConvertible

toJson

Method Detail

copy

public abstract Term copy(RegexAST ast,
                          boolean recursive)

Description copied from class: RegexASTNode

Copy this node, in one of the following ways:

• if recursive is true, recursively copy this subtree. This method should be used instead of CopyVisitor if the copying process is required to be thread-safe.
• else, copy this node only, without any child nodes.

In both cases, the ID and minPath of the copied nodes is left unset.

Specified by:

copy in class RegexASTNode

Parameters:

ast - RegexAST the new nodes should belong to.

Returns:

A shallow or deep copy of this node.

getSeqIndex

public int getSeqIndex()

setSeqIndex

public void setSeqIndex(int seqIndex)

hasQuantifier

public boolean hasQuantifier()

getQuantifier

public Token.Quantifier getQuantifier()

setQuantifier

public void setQuantifier(Token.Quantifier quantifier)

equalsSemantic

public boolean equalsSemantic(RegexASTNode obj)

Specified by:

equalsSemantic in class RegexASTNode

equalsSemantic

public abstract boolean equalsSemantic(RegexASTNode obj,
                                       boolean ignoreQuantifier)

quantifierToString

protected String quantifierToString()

getSubTreeParent

public RegexASTSubtreeRootNode getSubTreeParent()

Description copied from class: RegexASTNode

Returns the subtree root node that this node is a part of. If this node is nested inside several look-around assertion nodes, returns the innermost one that contains this node. Every AST node should have a subtree parent, but nodes implicitly generated by RegexAST.getNFAAnchoredInitialState(int) and RegexAST.getNFAUnAnchoredInitialState(int) technically don't belong to the AST, so they will return null.

Specified by:

getSubTreeParent in class RegexASTNode