Package org.mozilla.javascript.ast

Class UnaryExpression

java.lang.Object

org.mozilla.javascript.Node

org.mozilla.javascript.ast.AstNode

org.mozilla.javascript.ast.UnaryExpression

All Implemented Interfaces:

Comparable<AstNode>, Iterable<Node>

public class UnaryExpression
extends AstNode

AST node representing unary operators such as ++, ~, typeof and delete. The type field is set to the appropriate Token type for the operator. The node length spans from the operator to the end of the operand (for prefix operators) or from the start of the operand to the operator (for postfix).

The default xml namespace = <expr> statement in E4X (JavaScript 1.6) is represented as a UnaryExpression of node type Token.DEFAULTNAMESPACE, wrapped with an ExpressionStatement.

Nested Class Summary

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

AstNode.PositionComparator

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

Node.NodeIterator

Field Summary

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, FUNCTION_PROP, GENERATOR_END_PROP, INCRDECR_PROP, ISNUMBER_PROP, JSDOC_PROP, LABEL_ID_PROP, LAST_PROP, LEFT, LOCAL_BLOCK_PROP, LOCAL_PROP, MEMBER_TYPE_PROP, NAME_PROP, NON_SPECIALCALL, OBJECT_IDS_PROP, PARENTHESIZED_PROP, POST_FLAG, PROPERTY_FLAG, REGEXP_PROP, RIGHT, SKIP_INDEXES_PROP, SPECIALCALL_EVAL, SPECIALCALL_PROP, SPECIALCALL_WITH, TARGETBLOCK_PROP, VARIABLE_PROP

Constructor Summary

Constructors

Constructor	Description
UnaryExpression()
UnaryExpression(int pos)
UnaryExpression(int pos, int len)	Constructs a new postfix UnaryExpression
UnaryExpression(int operator, int operatorPosition, AstNode operand)	Constructs a new prefix UnaryExpression.
UnaryExpression(int operator, int operatorPosition, AstNode operand, boolean postFix)	Constructs a new UnaryExpression with the specified operator and operand.

Method Summary

Modifier and Type	Method	Description
AstNode	getOperand()
int	getOperator()	Returns operator token – alias for Node.getType()
boolean	isPostfix()	Returns whether the operator is postfix
boolean	isPrefix()	Returns whether the operator is prefix
void	setIsPostfix(boolean isPostfix)	Sets whether the operator is postfix
void	setOperand(AstNode operand)	Sets the operand, and sets its parent to be this node.
void	setOperator(int operator)	Sets operator – same as Node.setType(int), but throws an exception if the operator is invalid
String	toSource(int depth)	Emits source code for this node.
void	visit(NodeVisitor v)	Visits this node, then the operand.

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

addChild, codeBug, compareTo, debugPrint, depth, getAbsolutePosition, getAstRoot, getEnclosingFunction, getEnclosingScope, getLength, getLineno, getParent, getPosition, hasSideEffects, makeIndent, operatorToString, 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

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Constructor Details

UnaryExpression

public UnaryExpression()

UnaryExpression

public UnaryExpression(int pos)

UnaryExpression

public UnaryExpression(int pos,
 int len)

Constructs a new postfix UnaryExpression

UnaryExpression

public UnaryExpression(int operator,
 int operatorPosition,
 AstNode operand)

Constructs a new prefix UnaryExpression.

UnaryExpression

public UnaryExpression(int operator,
 int operatorPosition,
 AstNode operand,
 boolean postFix)

Constructs a new UnaryExpression with the specified operator and operand. It sets the parent of the operand, and sets its own bounds to encompass the operator and operand.

Parameters:

operator - the node type

operatorPosition - the absolute position of the operator.

operand - the operand expression

postFix - true if the operator follows the operand. Int

Throws:

IllegalArgumentException - } if operand is null

Method Details

getOperator

public int getOperator()

Returns operator token – alias for Node.getType()

setOperator

public void setOperator(int operator)

Sets operator – same as Node.setType(int), but throws an exception if the operator is invalid

Throws:

IllegalArgumentException - if operator is not a valid Token code

getOperand

public AstNode getOperand()

setOperand

public void setOperand(AstNode operand)

Sets the operand, and sets its parent to be this node.

Throws:

IllegalArgumentException - } if operand is null

isPostfix

public boolean isPostfix()

Returns whether the operator is postfix

isPrefix

public boolean isPrefix()

Returns whether the operator is prefix

setIsPostfix

public void setIsPostfix(boolean isPostfix)

Sets whether the operator is postfix

toSource

public 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 the operand.

Specified by:

visit in class AstNode

Parameters:

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