JSID_VOID 编辑

An additional jsid which is used to indicate the absence of a valid jsid.

Syntax

const jsid JSID_VOID;

const JS::HandleId JSID_VOIDHANDLE; // Added in SpiderMonkey 31

Description

JSID_VOID does not occur in JS scripts but may be used to indicate the absence of a valid jsid. A void jsid is not a valid id and only arises as an exceptional API return value, such as in JS_NextProperty. Embeddings must not pass JSID_VOID into JSAPI entry points expecting a jsid and do not need to handle JSID_VOID in hooks receiving a jsid except when explicitly noted in the API contract.

JSID_VOIDHANDLE is the handle to the jsid which value is JSID_VOID.

See Also

• MXR ID Search for JSID_VOID
• MXR ID Search for JSID_VOIDHANDLE
• bug 912411