Type Alias JSObjectGetPropertyNamesCallback

pub type JSObjectGetPropertyNamesCallback = Option<unsafe extern "C" fn(ctx: JSContextRef, object: JSObjectRef, propertyNames: JSPropertyNameAccumulatorRef)>;

The callback invoked when collecting the names of an object’s properties.

• ctx: The execution context to use.
• object: The JSObjectRef whose property names are being collected.
• propertyNames: A JavaScript property name accumulator in which to accumulate the names of object’s properties.

If you named your function GetPropertyNames, you would declare it like this:

void
GetPropertyNames(JSContextRef ctx, JSObjectRef object,
                 JSPropertyNameAccumulatorRef propertyNames);

Property name accumulators are used by JSObjectCopyPropertyNames and JavaScript for...in loops.

Use JSPropertyNameAccumulatorAddName to add property names to accumulator. A class’s getPropertyNames callback only needs to provide the names of properties that the class vends through a custom getProperty or setProperty callback. Other properties, including statically declared properties, properties vended by other classes, and properties belonging to object’s prototype, are added independently.

Aliased Type

pub enum JSObjectGetPropertyNamesCallback {
    None,
    Some(unsafe extern "C" fn(*const OpaqueJSContext, *mut OpaqueJSValue, *mut OpaqueJSPropertyNameAccumulator)),
}

Variants

None

No value.

Some(unsafe extern "C" fn(*const OpaqueJSContext, *mut OpaqueJSValue, *mut OpaqueJSPropertyNameAccumulator))

Some value of type T.