org.mozilla.javascript.ast

Class ExpressionStatement

java.lang.Object

org.mozilla.javascript.Node

org.mozilla.javascript.ast.AstNode

org.mozilla.javascript.ast.ExpressionStatement

All Implemented Interfaces:

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

public class ExpressionStatement
extends AstNode

AST node representing an expression in a statement context. The node type is Token.EXPR_VOID if inside a function, or else Token.EXPR_RESULT if inside a script.

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

inlineComment, length, parent, position

Fields inherited from class org.mozilla.javascript.Node

ARROW_FUNCTION_PROP, 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
ExpressionStatement()
ExpressionStatement(AstNode expr) Constructs a new ExpressionStatement wrapping the specified expression.
ExpressionStatement(AstNode expr, boolean hasResult) Constructs a new ExpressionStatement wrapping the specified expression.
ExpressionStatement(int pos, int len)
ExpressionStatement(int pos, int len, AstNode expr) Constructs a new ExpressionStatement

Method Summary

Modifier and Type	Method and Description
AstNode	getExpression() Returns the wrapped expression
boolean	hasSideEffects() Returns true if this node has side effects
void	setExpression(AstNode expression) Sets the wrapped expression, and sets its parent to this node.
void	setHasResult() Called by the parser to set node type to EXPR_RESULT if this node is not within a Function.
java.lang.String	toSource(int depth) Emits source code for this node.
void	visit(NodeVisitor v) Visits this node, then the wrapped statement.

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

addChild, assertNotNull, codeBug, compareTo, debugPrint, depth, getAbsolutePosition, getAstRoot, getEnclosingFunction, getEnclosingScope, getInlineComment, getLength, getLineno, getParent, getPosition, makeIndent, operatorToString, printList, setBounds, setInlineComment, 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

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Constructor Detail

ExpressionStatement

public ExpressionStatement()

ExpressionStatement

public ExpressionStatement(AstNode expr,
                           boolean hasResult)

Constructs a new ExpressionStatement wrapping the specified expression. Sets this node's position to the position of the wrapped node, and sets the wrapped node's position to zero. Sets this node's length to the length of the wrapped node.

Parameters:

expr - the wrapped expression

hasResult - true if this expression has side effects. If true, sets node type to EXPR_RESULT, else to EXPR_VOID.

ExpressionStatement

public ExpressionStatement(AstNode expr)

Constructs a new ExpressionStatement wrapping the specified expression. Sets this node's position to the position of the wrapped node, and sets the wrapped node's position to zero. Sets this node's length to the length of the wrapped node.

Parameters:

expr - the wrapped expression

ExpressionStatement

public ExpressionStatement(int pos,
                           int len)

ExpressionStatement

public ExpressionStatement(int pos,
                           int len,
                           AstNode expr)

Constructs a new ExpressionStatement

Parameters:

expr - the wrapped AstNode. The ExpressionStatement's bounds are set to those of expr, and expr's parent is set to this node.

Throws:

java.lang.IllegalArgumentException - if expr is null

Method Detail

setHasResult

public void setHasResult()

Called by the parser to set node type to EXPR_RESULT if this node is not within a Function.

getExpression

public AstNode getExpression()

Returns the wrapped expression

setExpression

public void setExpression(AstNode expression)

Sets the wrapped expression, and sets its parent to this node.

Throws:

IllegalArgumentException} - if expression is null

hasSideEffects

public boolean hasSideEffects()

Returns true if this node has side effects

Overrides:

hasSideEffects in class AstNode

Throws:

java.lang.IllegalStateException - if expression has not yet been set.

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 the wrapped statement.

Specified by:

visit in class AstNode

Parameters:

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