Struct Reader

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pub struct Reader<'a> { /* private fields */ }
Expand description

A read-only dynamically-typed struct.

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impl<'a> Reader<'a>

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pub fn new(reader: StructReader<'a>, schema: StructSchema) -> Self

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pub fn total_size(&self) -> Result<MessageSize>

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pub fn get_schema(&self) -> StructSchema

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pub fn get(self, field: Field) -> Result<Reader<'a>>

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pub fn get_named(self, field_name: &str) -> Result<Reader<'a>>

Gets the field with the given name.

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pub fn which(&self) -> Result<Option<Field>>

If this struct has union fields, returns the one that is currently active. Otherwise, returns None.

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pub fn has(&self, field: Field) -> Result<bool>

On a field that is part of a union, returns true if the field is active in the union and is not a null pointer. On non-union fields, returns true if the field is not a null pointer.

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pub fn has_named(&self, field_name: &str) -> Result<bool>

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pub fn downcast<T: OwnedStruct>(self) -> T::Reader<'a>

Downcasts the Reader into a specific struct type. Panics if the expected type does not match the value.

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impl<'a> Clone for Reader<'a>

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fn clone(&self) -> Reader<'a>

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for Reader<'_>

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

Formats the value using the given formatter. Read more
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impl<'a> DowncastReader<'a> for Reader<'a>

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fn downcast_reader(value: Reader<'a>) -> Self

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impl<'a> From<Reader<'a>> for Reader<'a>

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fn from(x: Reader<'a>) -> Reader<'a>

Converts to this type from the input type.
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impl<'a> SetterInput<Owned> for Reader<'a>

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fn set_pointer_builder<'b>( pointer: PointerBuilder<'b>, value: Reader<'a>, canonicalize: bool, ) -> Result<()>

Copies the values from input into builder, where builder represents the backing memory of a <Receiver as Owned>::Builder. Read more
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impl<'a> Copy for Reader<'a>

Auto Trait Implementations§

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impl<'a> Freeze for Reader<'a>

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impl<'a> !RefUnwindSafe for Reader<'a>

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impl<'a> !Send for Reader<'a>

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impl<'a> !Sync for Reader<'a>

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impl<'a> Unpin for Reader<'a>

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impl<'a> !UnwindSafe for Reader<'a>

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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> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dest. 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> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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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.