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JSVAL IS OBJECT

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Main Page > SpiderMonkey > JSAPI Reference > JSVAL_IS_OBJECT

Determine whether a given jsval is an object.

Contents

[edit] Syntax 

JSVAL_IS_OBJECT(v)

[edit] Description

JSVAL_IS_OBJECT(v) returns true if v is either an object or JSVAL_NULL. This indicates that it is safe to call JSVAL_TO_OBJECT(v) to convert v to type JSObject *. Be sure to check for JSVAL_NULL separately if necessary.

JSVAL_IS_OBJECT(v) returns false if v is any other type of value: a boolean, number, string, or JSVAL_VOID.

The result of JSVAL_IS_OBJECT(v) is a C/C++ boolean value, not a boolean jsval.

[edit] Example

The following code snippet illustrates how a JavaScript variable, MyItem, is conditionally tested in an if statement to see if it is an object. 

if (JSVAL_IS_OBJECT(MyItem)) {
    . . .
}

[edit] See Also

LXR ID Search for JSVAL_IS_OBJECT

JSVAL_IS_BOOLEAN, JSVAL_IS_DOUBLE, JSVAL_IS_INT, JSVAL_IS_NULL, JSVAL_IS_NUMBER, JSVAL_IS_PRIMITIVE, JSVAL_IS_STRING, JSVAL_IS_VOID

Retrieved from "http://developer.mozilla.org/en/docs/JSVAL_IS_OBJECT"