org.mozilla.javascript.ast

Class ArrayLiteral

java.lang.Object

org.mozilla.javascript.Node

org.mozilla.javascript.ast.AstNode

org.mozilla.javascript.ast.ArrayLiteral

All Implemented Interfaces:

java.lang.Comparable<AstNode>, java.lang.Iterable<Node>, DestructuringForm

public class ArrayLiteral
extends AstNode
implements DestructuringForm

AST node for an Array literal. The elements list will always be non-null, although the list will have no elements if the Array literal is empty.

Node type is Token.ARRAYLIT.

ArrayLiteral :
        [ Elisionopt ]
        [ ElementList ]
        [ ElementList , Elisionopt ]
 ElementList :
        Elisionopt AssignmentExpression
        ElementList , Elisionopt AssignmentExpression
 Elision :
        ,
        Elision ,

Nested Class Summary

Nested classes/interfaces inherited from class org.mozilla.javascript.ast.AstNode

AstNode.DebugPrintVisitor, AstNode.PositionComparator

Nested classes/interfaces inherited from class org.mozilla.javascript.Node

Node.NodeIterator

Field Summary

Fields inherited from class org.mozilla.javascript.ast.AstNode

length, parent, position

Fields inherited from class org.mozilla.javascript.Node

ATTRIBUTE_FLAG, BOTH, CASEARRAY_PROP, CATCH_SCOPE_PROP, CONTROL_BLOCK_PROP, DECR_FLAG, DESCENDANTS_FLAG, DESTRUCTURING_ARRAY_LENGTH, DESTRUCTURING_NAMES, DESTRUCTURING_PARAMS, DESTRUCTURING_SHORTHAND, DIRECTCALL_PROP, END_DROPS_OFF, END_RETURNS, END_RETURNS_VALUE, END_UNREACHED, END_YIELDS, EXPRESSION_CLOSURE_PROP, first, FUNCTION_PROP, GENERATOR_END_PROP, INCRDECR_PROP, ISNUMBER_PROP, JSDOC_PROP, LABEL_ID_PROP, last, LAST_PROP, LEFT, lineno, LOCAL_BLOCK_PROP, LOCAL_PROP, MEMBER_TYPE_PROP, NAME_PROP, next, NON_SPECIALCALL, OBJECT_IDS_PROP, PARENTHESIZED_PROP, POST_FLAG, PROPERTY_FLAG, propListHead, REGEXP_PROP, RIGHT, SKIP_INDEXES_PROP, SPECIALCALL_EVAL, SPECIALCALL_PROP, SPECIALCALL_WITH, TARGETBLOCK_PROP, type, VARIABLE_PROP

Constructor Summary

Constructors

Constructor and Description
ArrayLiteral()
ArrayLiteral(int pos)
ArrayLiteral(int pos, int len)

Method Summary

Methods

Modifier and Type	Method and Description
void	addElement(AstNode element) Adds an element to the list, and sets its parent to this node.
int	getDestructuringLength() Returns destructuring length
AstNode	getElement(int index) Returns element at specified index.
java.util.List<AstNode>	getElements() Returns the element list
int	getSize() Returns the number of elements in this Array literal, including empty elements.
int	getSkipCount() Used by code generator.
boolean	isDestructuring() Returns true if this node is in a destructuring position: a function parameter, the target of a variable initializer, the iterator of a for..in loop, etc.
void	setDestructuringLength(int destructuringLength) Sets destructuring length.
void	setElements(java.util.List<AstNode> elements) Sets the element list, and sets each element's parent to this node.
void	setIsDestructuring(boolean destructuring) Marks this node as being a destructuring form - that is, appearing in a context such as for ([a, b] in ...) where it's the target of a destructuring assignment.
void	setSkipCount(int count) Used by code generator.
java.lang.String	toSource(int depth) Emits source code for this node.
void	visit(NodeVisitor v) Visits this node, then visits its element expressions in order.

Methods inherited from class org.mozilla.javascript.ast.AstNode

addChild, assertNotNull, codeBug, compareTo, debugPrint, depth, getAbsolutePosition, getAstRoot, getEnclosingFunction, getEnclosingScope, getLength, getLineno, getParent, getPosition, hasSideEffects, makeIndent, operatorToString, printList, setBounds, setLength, setParent, setPosition, setRelative, shortName, toSource

Methods inherited from class org.mozilla.javascript.Node

addChildAfter, addChildBefore, addChildrenToBack, addChildrenToFront, addChildToBack, addChildToFront, getChildBefore, getDouble, getExistingIntProp, getFirstChild, getIntProp, getJsDoc, getJsDocNode, getLastChild, getLastSibling, getNext, getProp, getScope, getString, getType, hasChildren, hasConsistentReturnUsage, iterator, labelId, labelId, newNumber, newString, newString, newTarget, putIntProp, putProp, removeChild, removeChildren, removeProp, replaceChild, replaceChildAfter, resetTargets, setDouble, setJsDocNode, setLineno, setScope, setString, setType, toString, toStringTree

Methods inherited from class java.lang.Object

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

Constructor Detail

ArrayLiteral

public ArrayLiteral()

ArrayLiteral

public ArrayLiteral(int pos)

ArrayLiteral

public ArrayLiteral(int pos,
            int len)

Method Detail

getElements

public java.util.List<AstNode> getElements()

Returns the element list

Returns:

the element list. If there are no elements, returns an immutable empty list. Elisions are represented as EmptyExpression nodes.

setElements

public void setElements(java.util.List<AstNode> elements)

Sets the element list, and sets each element's parent to this node.

Parameters:

elements - the element list. Can be null.

addElement

public void addElement(AstNode element)

Adds an element to the list, and sets its parent to this node.

Parameters:

element - the element to add

Throws:

java.lang.IllegalArgumentException - if element is null. To indicate an empty element, use an EmptyExpression node.

getSize

public int getSize()

Returns the number of elements in this Array literal, including empty elements.

getElement

public AstNode getElement(int index)

Returns element at specified index.

Parameters:

index - the index of the element to retrieve

Returns:

the element

Throws:

java.lang.IndexOutOfBoundsException - if the index is invalid

getDestructuringLength

public int getDestructuringLength()

Returns destructuring length

setDestructuringLength

public void setDestructuringLength(int destructuringLength)

Sets destructuring length. This is set by the parser and used by the code generator. for ([a,] in obj) is legal, but for ([a] in obj) is not since we have both key and value supplied. The difference is only meaningful in array literals used in destructuring-assignment contexts.

getSkipCount

public int getSkipCount()

Used by code generator.

Returns:

the number of empty elements

setSkipCount

public void setSkipCount(int count)

Used by code generator.

Parameters:

count - the count of empty elements

setIsDestructuring

public void setIsDestructuring(boolean destructuring)

Marks this node as being a destructuring form - that is, appearing in a context such as for ([a, b] in ...) where it's the target of a destructuring assignment.

Specified by:

setIsDestructuring in interface DestructuringForm

isDestructuring

public boolean isDestructuring()

Returns true if this node is in a destructuring position: a function parameter, the target of a variable initializer, the iterator of a for..in loop, etc.

Specified by:

isDestructuring in interface DestructuringForm

toSource

public java.lang.String toSource(int depth)

Description copied from class: AstNode

Emits source code for this node. Callee is responsible for calling this function recursively on children, incrementing indent as appropriate.

Note: if the parser was in error-recovery mode, some AST nodes may have null children that are expected to be non-null when no errors are present. In this situation, the behavior of the toSource method is undefined: toSource implementations may assume that the AST node is error-free, since it is intended to be invoked only at runtime after a successful parse.

Specified by:

toSource in class AstNode

Parameters:

depth - the current recursion depth, typically beginning at 0 when called on the root node.

visit

public void visit(NodeVisitor v)

Visits this node, then visits its element expressions in order. Any empty elements are represented by EmptyExpression objects, so the callback will never be passed null.

Specified by:

visit in class AstNode

Parameters:

v - the object to call with this node and its children