Package EDU.purdue.jtb.parser.syntaxtree
Class NodeOptional
java.lang.Object
EDU.purdue.jtb.parser.syntaxtree.NodeOptional
- All Implemented Interfaces:
INode
,Serializable
Represents a grammar optional node (? or []), e.g. ' ( A )? ' or ' [ A ] '.
The class stores the node.
The class stores the node.
- See Also:
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Field Summary
Fields -
Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionint
accept
(IIntVisitor vis) Accepts aIIntVisitor
visitor with user return data.void
accept
(IVoidVisitor vis) Accepts aIVoidVisitor
visitor} visitor with user return data.void
Adds a node to theNodeOptional
.boolean
present()
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Field Details
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node
The node (if null there is no node)
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Constructor Details
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NodeOptional
public NodeOptional()Initializes an emptyNodeOptional
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NodeOptional
Initializes aNodeOptional
with a node.- Parameters:
n
- - the node
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Method Details
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addNode
Adds a node to theNodeOptional
.- Parameters:
n
- - the node to add
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present
public boolean present()- Returns:
- true if the node exists, false otherwise
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accept
Accepts aIIntVisitor
visitor with user return data. -
accept
Accepts aIVoidVisitor
visitor} visitor with user return data.
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