multiversx_sc::storage::mappers

Struct SingleValue

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pub struct SingleValue<T: TopDecode>(/* private fields */);
Expand description

Intermediary type for deserializing the result of an endpoint that returns a SingleValueMapper.

Necessary because we cannot implement TypeAbiFrom directly on T.

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impl<T: TopDecode> SingleValue<T>

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pub fn into(self) -> T

Trait Implementations§

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impl<T: TopDecode> From<T> for SingleValue<T>

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fn from(value: T) -> Self

Converts to this type from the input type.
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impl<T: TopDecode> TopDecode for SingleValue<T>

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fn top_decode_or_handle_err<I, H>(input: I, h: H) -> Result<Self, H::HandledErr>
where I: TopDecodeInput, H: DecodeErrorHandler,

Version of top_decode that can handle errors as soon as they occur. For instance it can exit immediately and make sure that if it returns, it is a success. By not deferring error handling, this can lead to somewhat smaller bytecode.
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fn top_decode<I>(input: I) -> Result<Self, DecodeError>
where I: TopDecodeInput,

Attempt to deserialize the value from input.
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impl<T: TopEncode + TopDecode> TopEncode for SingleValue<T>

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fn top_encode_or_handle_err<O, H>( &self, output: O, h: H, ) -> Result<(), H::HandledErr>
where O: TopEncodeOutput, H: EncodeErrorHandler,

Version of top_encode that can handle errors as soon as they occur. For instance in can exit immediately and make sure that if it returns, it is a success. By not deferring error handling, this can lead to somewhat smaller bytecode.
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fn top_encode<O>(&self, output: O) -> Result<(), EncodeError>
where O: TopEncodeOutput,

Attempt to serialize the value to ouput.
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impl<SA, T, R> TypeAbiFrom<SingleValueMapper<SA, T>> for SingleValue<R>
where SA: StorageMapperApi, T: TopEncode + TopDecode, R: TopDecode + TypeAbiFrom<T>,

Auto Trait Implementations§

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impl<T> Freeze for SingleValue<T>
where T: Freeze,

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impl<T> RefUnwindSafe for SingleValue<T>
where T: RefUnwindSafe,

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impl<T> Send for SingleValue<T>
where T: Send,

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impl<T> Sync for SingleValue<T>
where T: Sync,

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impl<T> Unpin for SingleValue<T>
where T: Unpin,

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impl<T> UnwindSafe for SingleValue<T>
where T: UnwindSafe,

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,

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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,

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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

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fn from(t: T) -> T

Returns the argument unchanged.

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

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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> SCCodec for T
where T: TopEncode,

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fn fmt<F>(&self, f: &mut F)
where F: FormatByteReceiver,

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impl<T> TopDecodeMulti for T
where T: TopDecode,

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const IS_SINGLE_VALUE: bool = true

Used to optimize single value loading of endpoint arguments.
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fn multi_decode_or_handle_err<I, H>( input: &mut I, h: H, ) -> Result<T, <H as DecodeErrorHandler>::HandledErr>
where I: TopDecodeMultiInput, H: DecodeErrorHandler,

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fn multi_decode<I>(input: &mut I) -> Result<Self, DecodeError>
where I: TopDecodeMultiInput,

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impl<T> TopDecodeMultiLength for T
where T: TopEncode + TopDecode,

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const LEN: usize = 1usize

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fn get_len() -> usize

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impl<T> TopEncodeMulti for T
where T: TopEncode,

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fn multi_encode_or_handle_err<O, H>( &self, output: &mut O, h: H, ) -> Result<(), <H as EncodeErrorHandler>::HandledErr>
where O: TopEncodeMultiOutput, H: EncodeErrorHandler,

Version of top_encode that can handle errors as soon as they occur. For instance in can exit immediately and make sure that if it returns, it is a success. By not deferring error handling, this can lead to somewhat smaller bytecode.
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fn multi_encode<O>(&self, output: &mut O) -> Result<(), EncodeError>
where O: TopEncodeMultiOutput,

Attempt to serialize the value to ouput.
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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.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

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

Performs the conversion.
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impl<O, T> ProxyArg<O> for T
where O: TypeAbiFrom<T>, T: TopEncodeMulti,