Function ExecuteRegExp 

pub unsafe fn ExecuteRegExp(
    cx: &mut JSContext,
    obj: Handle<'_, *mut JSObject>,
    reobj: Handle<'_, *mut JSObject>,
    chars: *const u16,
    length: usize,
    indexp: *mut usize,
    test: bool,
    rval: MutableHandle<'_, Value>,
) -> bool