[][src]Struct cosmwasm_storage::ReadonlySingleton

pub struct ReadonlySingleton<'a, S: ReadonlyStorage, T> where
    T: Serialize + DeserializeOwned
{ /* fields omitted */ }

ReadonlySingleton only requires a ReadonlyStorage and exposes only the methods of Singleton that don't modify state.

Implementations

impl<'a, S: ReadonlyStorage, T> ReadonlySingleton<'a, S, T> where
    T: Serialize + DeserializeOwned
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pub fn new(storage: &'a S, key: &[u8]) -> Self[src]

pub fn load(&self) -> StdResult<T>[src]

load will return an error if no data is set at the given key, or on parse error

pub fn may_load(&self) -> StdResult<Option<T>>[src]

may_load will parse the data stored at the key if present, returns Ok(None) if no data there. returns an error on issues parsing

Auto Trait Implementations

impl<'a, S, T> RefUnwindSafe for ReadonlySingleton<'a, S, T> where
    S: RefUnwindSafe,
    T: RefUnwindSafe

impl<'a, S, T> Send for ReadonlySingleton<'a, S, T> where
    S: Sync,
    T: Sync

impl<'a, S, T> Sync for ReadonlySingleton<'a, S, T> where
    S: Sync,
    T: Sync

impl<'a, S, T> Unpin for ReadonlySingleton<'a, S, T>

impl<'a, S, T> UnwindSafe for ReadonlySingleton<'a, S, T> where
    S: RefUnwindSafe,
    T: RefUnwindSafe

Blanket Implementations

impl<T> Any for T where
    T: 'static + ?Sized
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impl<T> Borrow<T> for T where
    T: ?Sized
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impl<T> BorrowMut<T> for T where
    T: ?Sized
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impl<T> From<T> for T[src]

impl<T, U> Into<U> for T where
    U: From<T>, 
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impl<T, U> TryFrom<U> for T where
    U: Into<T>, 
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type Error = Infallible

The type returned in the event of a conversion error.

impl<T, U> TryInto<U> for T where
    U: TryFrom<T>, 
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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.