Type Alias mozjs::jsapi::ReduceMicrosecondTimePrecisionCallback
source · pub type ReduceMicrosecondTimePrecisionCallback = Option<unsafe extern "C" fn(_: f64, _: bool, _: *mut JSContext) -> f64>;
Aliased Type§
enum ReduceMicrosecondTimePrecisionCallback {
None,
Some(unsafe extern "C" fn(_: f64, _: bool, _: *mut JSContext) -> f64),
}
Variants§
None
No value.
Some(unsafe extern "C" fn(_: f64, _: bool, _: *mut JSContext) -> f64)
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.