NullIo

viva_genapi

Struct NullIo 

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pub struct NullIo;
Expand description

No-op register I/O that returns zeroed data for reads and ignores writes.

Useful for offline XML browsing (WASM, no camera) where register access is not available. SwissKnife expressions depending only on XML-defined constants will evaluate correctly; register-backed nodes will return zeros.

Trait Implementations§

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impl RegisterIo for NullIo

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fn read(&self, _addr: u64, len: usize) -> Result<Vec<u8>, GenApiError>

Read len bytes starting at addr.
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fn write(&self, _addr: u64, _data: &[u8]) -> Result<(), GenApiError>

Write data starting at addr.

Auto Trait Implementations§

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impl Freeze for NullIo

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impl RefUnwindSafe for NullIo

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impl Send for NullIo

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impl Sync for NullIo

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impl Unpin for NullIo

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impl UnwindSafe for NullIo

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> Instrument for T

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fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided [Span], returning an Instrumented wrapper. Read more
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fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
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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, 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<T> WithSubscriber for T

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fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a [WithDispatch] wrapper. Read more
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fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a [WithDispatch] wrapper. Read more