Type Alias mozjs::jsapi::JSPreWrapCallback

pub type JSPreWrapCallback = Option<unsafe extern "C" fn(_: *mut JSContext, _: Handle<*mut JSObject>, _: Handle<*mut JSObject>, _: Handle<*mut JSObject>, _: Handle<*mut JSObject>, _: MutableHandle<*mut JSObject>)>;

Callback used by the wrap hook to ask the embedding to prepare an object for wrapping in a context. This might include unwrapping other wrappers or even finding a more suitable object for the new compartment. If |origObj| is non-null, then it is the original object we are going to swap into during a transplant.

Aliased Type

enum JSPreWrapCallback {
    None,
    Some(unsafe extern "C" fn(_: *mut JSContext, _: Handle<*mut JSObject>, _: Handle<*mut JSObject>, _: Handle<*mut JSObject>, _: Handle<*mut JSObject>, _: MutableHandle<*mut JSObject>)),
}

Variants

None

No value.

Some(unsafe extern "C" fn(_: *mut JSContext, _: Handle<*mut JSObject>, _: Handle<*mut JSObject>, _: Handle<*mut JSObject>, _: Handle<*mut JSObject>, _: MutableHandle<*mut JSObject>))

Some value of type T.

Trait Implementations

impl<T: CustomTrace> CustomTrace for Option<T>

fn trace(&self, trc: *mut JSTracer)

impl<T: FromJSValConvertible> FromJSValConvertible for Option<T>

type Config = <T as FromJSValConvertible>::Config

Optional configurable behaviour switch; use () for no configuration.

unsafe fn from_jsval( cx: *mut JSContext, value: HandleValue<'_>, option: T::Config ) -> Result<ConversionResult<Option<T>>, ()>

Convert val to type Self. Optional configuration of type T can be passed as the option argument. If it returns Err(()), a JSAPI exception is pending. If it returns Ok(Failure(reason)), there is no pending JSAPI exception.

impl<T: ToJSValConvertible> ToJSValConvertible for Option<T>

unsafe fn to_jsval(&self, cx: *mut JSContext, rval: MutableHandleValue<'_>)

Convert self to a JSVal. JSAPI failure causes a panic.

impl<T: Traceable> Traceable for Option<T>

unsafe fn trace(&self, trc: *mut JSTracer)

Trace self.