JSHasInstanceOp 编辑

JSHasInstanceOp is the type of JSClass.hasInstance.

Syntax

typedef bool
(* JSHasInstanceOp)(JSContext *cx, JS::HandleObject obj, JS::MutableHandleValue vp,
                    bool *bp);

Description

JSHasInstanceOp is called to check whether v is an instance of obj. Return false on error or exception, true on success with true in *bp if v is an instance of obj, false in *bp otherwise.

JSClass hooks

JSClass offers the following hook:

• The JSClass.hasInstance callback implements JS_HasInstance and the JavaScript instanceof keyword.

See Also

• MXR ID Search for JSHasInstanceOp
• JSClass
• JS_HasInstance