[Java] Class Reduction

org.codehaus.groovy.syntax.Reduction

A syntax reduction, produced by the Parser.

See Also:: Parser; Token; CSTNode; Types

Authors:: bob mcwhirter; Chris Poirier

Field Summary

Fields
Modifiers	Name	Description
`static Reduction`	`EMPTY`

Constructor Summary

Constructors
Constructor and description
`Reduction (Token root)` Initializes the `Reduction` with the specified root.

Methods Summary

Methods
Type Params	Return Type	Name and description
	`CSTNode`	`add(CSTNode element)` Adds an element to the node.
	`Reduction`	`asReduction()` Creates a `Reduction` from this node.
	`CSTNode`	`get(int index)` Returns the specified element, or null.
	`Token`	`getRoot()` Returns the root of the node, the Token that indicates it's type.
	`boolean`	`isAnExpression()` Returns true if the node is a complete expression.
	`boolean`	`isEmpty()` Returns true if the node is completely empty (no root, even).
	`void`	`markAsExpression()` Marks the node a complete expression.
	`static Reduction`	`newContainer()` Creates a new `Reduction` with `Token.NULL` as it's root.
	`CSTNode`	`remove(int index)` Removes a node from the `Reduction`.
	`CSTNode`	`set(int index, CSTNode element)` Sets an element in at the specified index.
	`int`	`size()` Returns the number of elements in the node.

Inherited Methods Summary

Inherited Methods
Methods inherited from class	Name
`class CSTNode`	`add, addChildrenOf, asReduction, canMean, children, get, get, getDescription, getMeaning, getMeaningAs, getRoot, getRoot, getRootText, getStartColumn, getStartLine, getType, hasChildren, isA, isAllOf, isAnExpression, isEmpty, isOneOf, markAsExpression, set, setMeaning, size, toString, write, write`
`class Object`	`wait, wait, wait, equals, toString, hashCode, getClass, notify, notifyAll`

Field Detail

public static final Reduction EMPTY

Constructor Detail

public Reduction(Token root)

Initializes the Reduction with the specified root.

Method Detail

public CSTNode add(CSTNode element)

Adds an element to the node.

public Reduction asReduction()

Creates a Reduction from this node. Returns self if the node is already a Reduction.

public CSTNode get(int index)

Returns the specified element, or null.

public Token getRoot()

Returns the root of the node, the Token that indicates it's type. Returns null if there is no root (usually only if the node is a placeholder of some kind -- see isEmpty()).

public boolean isAnExpression()

Returns true if the node is a complete expression.

public boolean isEmpty()

Returns true if the node is completely empty (no root, even).

public void markAsExpression()

Marks the node a complete expression.

public static Reduction newContainer()

Creates a new Reduction with Token.NULL as it's root.

public CSTNode remove(int index)

Removes a node from the Reduction. You cannot remove the root node (index 0).

public CSTNode set(int index, CSTNode element)

Sets an element in at the specified index.

public int size()

Returns the number of elements in the node.

© 2003-2020 The Apache Software Foundation
Licensed under the Apache license.
https://docs.groovy-lang.org/2.4.21/html/gapi/org/codehaus/groovy/syntax/Reduction.html