Type Alias mozjs::jsapi::JSResolveOp
source · pub type JSResolveOp = Option<unsafe extern "C" fn(_: *mut JSContext, _: Handle<*mut JSObject>, _: Handle<PropertyKey>, _: *mut bool) -> bool>;
Expand description
Resolve a lazy property named by id in obj by defining it directly in obj. Lazy properties are those reflected from some peer native property space (e.g., the DOM attributes for a given node reflected as obj) on demand.
JS looks for a property in an object, and if not found, tries to resolve the given id. *resolvedp should be set to true iff the property was defined on |obj|.
Aliased Type§
enum JSResolveOp {
None,
Some(unsafe extern "C" fn(_: *mut JSContext, _: Handle<*mut JSObject>, _: Handle<PropertyKey>, _: *mut bool) -> bool),
}
Variants§
None
No value.
Some(unsafe extern "C" fn(_: *mut JSContext, _: Handle<*mut JSObject>, _: Handle<PropertyKey>, _: *mut bool) -> bool)
Some value of type T
.
Trait Implementations§
source§impl<T: CustomTrace> CustomTrace for Option<T>
impl<T: CustomTrace> CustomTrace for Option<T>
source§impl<T: FromJSValConvertible> FromJSValConvertible for Option<T>
impl<T: FromJSValConvertible> FromJSValConvertible for Option<T>
§type Config = <T as FromJSValConvertible>::Config
type Config = <T as FromJSValConvertible>::Config
Optional configurable behaviour switch; use () for no configuration.
source§unsafe fn from_jsval(
cx: *mut JSContext,
value: HandleValue<'_>,
option: T::Config
) -> Result<ConversionResult<Option<T>>, ()>
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.