Enum QueryStateData 

pub enum QueryStateData<Q: QueryCapability> {
    Pending,
    Loading {
        res: Option<Result<Q::Ok, Q::Err>>,
    },
    Settled {
        res: Result<Q::Ok, Q::Err>,
        settlement_instant: Instant,
    },
}

Variants

Pending

Has not loaded yet.

Loading

Is loading and may not have a previous settled value.

Fields

res: Option<Result<Q::Ok, Q::Err>>

Settled

Is not loading and has a settled value.

Fields

res: Result<Q::Ok, Q::Err>

settlement_instant: Instant

Implementations

impl<Q: QueryCapability> QueryStateData<Q>

pub fn is_ok(&self) -> bool

Check if the state is QueryStateData::Settled and Result::Ok.

pub fn is_err(&self) -> bool

Check if the state is QueryStateData::Settled and Result::Err.

pub fn is_loading(&self) -> bool

Check if the state is QueryStateData::Loading.

pub fn is_pending(&self) -> bool

Check if the state is QueryStateData::Pending.

pub fn is_stale(&self, query: &Query<Q>) -> bool

Check if the state is stale or not, where stale means outdated.

pub fn ok(&self) -> Option<&Q::Ok>

Get the value as an Option.

pub fn unwrap(&self) -> &Result<Q::Ok, Q::Err>

Get the value as an Result if possible, otherwise it will panic.

Trait Implementations

impl<Q> Debug for QueryStateData<Q>

where Q: QueryCapability, Q::Ok: Debug, Q::Err: Debug,

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<Q: QueryCapability> TryFrom<QueryStateData<Q>> for Result<Q::Ok, Q::Err>

type Error = ()

The type returned in the event of a conversion error.

fn try_from(value: QueryStateData<Q>) -> Result<Self, Self::Error>

Performs the conversion.