JSEnumerateOp 编辑

JSEnumerateOp is the type of the JSClass.enumerate callback.

Syntax

typedef bool
(* JSEnumerateOp)(JSContext *cx, JS::HandleObject obj);

Description

JSEnumerateOp is called just before an object is enumerated (via a for...in statement, an array comprehension, or a call to JS_Enumerate). It should define any remaining lazy properties that should be enumerable but are not yet defined in obj. This hook does not implement iteration: once the properties are defined, the JavaScript engine can enumerate them.

JSClass hooks

JSClass offers following hook:

• The JSClass.enumerate hook is for classes that implement lazy properties using JSClass.resolve.

See Also

• MXR ID Search for JSEnumerateOp
• JSNewEnumerateOp
• JSClass