Struct fadroma::prelude::cosmwasm_storage::ReadonlySingleton

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

Expand description

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

Implementations

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impl<'a, S, T> ReadonlySingleton<'a, S, T> where
S: ReadonlyStorage,
T: Serialize + DeserializeOwned,

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pub fn new(storage: &'a S, key: &[u8 ]) -> ReadonlySingleton<'a, S, T>

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pub fn load(&self) -> Result<T, StdError>

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

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pub fn may_load(&self) -> Result<Option<T>, StdError>

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

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impl<T> Any for T where
T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

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impl<T> Borrow<T> for T where
T: ?Sized,

const: unstable · source

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

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impl<T> BorrowMut<T> for T where
T: ?Sized,

const: unstable · source

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

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impl<T> From<T> for T

const: unstable · source

fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into for T where
U: From<T>,

const: unstable · source

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> Same<T> for T

type Output = T

Should always be Self

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impl<T, U> TryFrom for T where
U: Into<T>,

type Error = Infallible

The type returned in the event of a conversion error.

const: unstable · source

fn try_from(value: U) -> Result<T, <T as TryFrom>::Error>

Performs the conversion.

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impl<T, U> TryInto for T where
U: TryFrom<T>,

type Error = >::Error

The type returned in the event of a conversion error.

const: unstable · source

fn try_into(self) -> Result<U, >::Error>

Performs the conversion.

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impl<V, T> VZip<V> for T where
V: MultiLane<T>,

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Struct fadroma::prelude::cosmwasm_storage::ReadonlySingleton

Implementations

impl<'a, S, T> ReadonlySingleton<'a, S, T> where
S: ReadonlyStorage,
T: Serialize + DeserializeOwned,

pub fn new(storage: &'a S, key: &[u8 ]) -> ReadonlySingleton<'a, S, T>

pub fn load(&self) -> Result<T, StdError>

pub fn may_load(&self) -> Result<Option<T>, StdError>

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,

fn type_id(&self) -> TypeId

impl<T> Borrow<T> for T where
T: ?Sized,

fn borrow(&self) -> &T

impl<T> BorrowMut<T> for T where
T: ?Sized,

fn borrow_mut(&mut self) -> &mut T

impl<T> From<T> for T

fn from(t: T) -> T

impl<T, U> Into<U> for T where
U: From<T>,

fn into(self) -> U

impl<T> Same<T> for T

type Output = T

impl<T, U> TryFrom<U> for T where
U: Into<T>,

type Error = Infallible

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

impl<T, U> TryInto<U> for T where
U: TryFrom<T>,

type Error = <U as TryFrom<T>>::Error

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

impl<V, T> VZip<V> for T where
V: MultiLane<T>,

fn vzip(self) -> V

Struct fadroma::prelude::cosmwasm_storage::ReadonlySingleton

Implementations

impl<'a, S, T> ReadonlySingleton<'a, S, T> where S: ReadonlyStorage, T: Serialize + DeserializeOwned,

pub fn new(storage: &'a S, key: &[u8]) -> ReadonlySingleton<'a, S, T>

pub fn load(&self) -> Result<T, StdError>

pub fn may_load(&self) -> Result<Option<T>, StdError>

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,

fn type_id(&self) -> TypeId

impl<T> Borrow<T> for T where T: ?Sized,

fn borrow(&self) -> &T

impl<T> BorrowMut<T> for T where T: ?Sized,

fn borrow_mut(&mut self) -> &mut T

impl<T> From<T> for T

fn from(t: T) -> T

impl<T, U> Into<U> for T where U: From<T>,

fn into(self) -> U

impl<T> Same<T> for T

type Output = T

impl<T, U> TryFrom<U> for T where U: Into<T>,

type Error = Infallible

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

impl<T, U> TryInto<U> for T where U: TryFrom<T>,

type Error = <U as TryFrom<T>>::Error

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

impl<V, T> VZip<V> for T where V: MultiLane<T>,

fn vzip(self) -> V

impl<'a, S, T> ReadonlySingleton<'a, S, T> where
S: ReadonlyStorage,
T: Serialize + DeserializeOwned,

pub fn new(storage: &'a S, key: &[u8 ]) -> ReadonlySingleton<'a, S, T>

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

impl<T> Any for T where
T: 'static + ?Sized,

impl<T> Borrow<T> for T where
T: ?Sized,

impl<T> BorrowMut<T> for T where
T: ?Sized,

impl<T, U> Into<U> for T where
U: From<T>,

impl<T, U> TryFrom<U> for T where
U: Into<T>,

impl<T, U> TryInto<U> for T where
U: TryFrom<T>,

impl<V, T> VZip<V> for T where
V: MultiLane<T>,