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Struct PeekOption

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pub struct PeekOption<'mem> { /* private fields */ }
Expand description

Lets you read from an option (implements read-only option operations)

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impl<'mem> PeekOption<'mem>

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pub fn def(self) -> OptionDef

Returns the option definition

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pub fn vtable(self) -> &'static OptionVTable

Returns the option vtable

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pub fn is_some(self) -> bool

Returns whether the option is Some

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pub fn is_none(self) -> bool

Returns whether the option is None

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pub fn value(self) -> Option<Peek<'mem>>

Returns the inner value as a Peek if the option is Some, None otherwise

Methods from Deref<Target = PeekValue<'mem>>§

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pub fn vtable(&self) -> &'static ValueVTable

Returns the vtable

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pub fn eq(&self, other: &PeekValue<'_>) -> Option<bool>

Returns true if this scalar is equal to the other scalar

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false if equality comparison is not supported for this scalar type

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pub fn partial_cmp(&self, other: &PeekValue<'_>) -> Option<Ordering>

Compares this scalar with another and returns their ordering

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None if comparison is not supported for this scalar type

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pub fn cmp(&self, other: &PeekValue<'_>) -> Option<Ordering>

Compares this scalar with another and returns their ordering

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None if comparison is not supported for this scalar type

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pub fn gt(&self, other: &PeekValue<'_>) -> bool

Returns true if this scalar is greater than the other scalar

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false if comparison is not supported for this scalar type

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pub fn gte(&self, other: &PeekValue<'_>) -> bool

Returns true if this scalar is greater than or equal to the other scalar

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false if comparison is not supported for this scalar type

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pub fn lt(&self, other: &PeekValue<'_>) -> bool

Returns true if this scalar is less than the other scalar

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false if comparison is not supported for this scalar type

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pub fn lte(&self, other: &PeekValue<'_>) -> bool

Returns true if this scalar is less than or equal to the other scalar

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false if comparison is not supported for this scalar type

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

Formats this scalar for display

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None if display formatting is not supported for this scalar type

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

Formats this scalar for debug

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None if debug formatting is not supported for this scalar type

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pub fn hash<H: Hasher>(&self, hasher: &mut H) -> bool

Hashes this scalar

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false if hashing is not supported for this scalar type, true otherwise

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pub fn type_name(&self, f: &mut Formatter<'_>, opts: TypeNameOpts) -> Result

Returns the type name of this scalar

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  • f - A mutable reference to a core::fmt::Formatter
  • opts - The TypeNameOpts to use for formatting
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The result of the type name formatting

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pub fn shape(&self) -> &'static Shape

Returns the shape

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pub fn data(&self) -> OpaqueConst<'mem>

Returns the data

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pub fn scalar_type(&self) -> Option<ScalarType>

Get the scalar type if set.

Trait Implementations§

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impl<'mem> Clone for PeekOption<'mem>

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fn clone(&self) -> PeekOption<'mem>

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<'mem> Deref for PeekOption<'mem>

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type Target = PeekValue<'mem>

The resulting type after dereferencing.
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fn deref(&self) -> &Self::Target

Dereferences the value.
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impl<'mem> Copy for PeekOption<'mem>

Auto Trait Implementations§

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impl<'mem> Freeze for PeekOption<'mem>

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impl<'mem> RefUnwindSafe for PeekOption<'mem>

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impl<'mem> Send for PeekOption<'mem>

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impl<'mem> Sync for PeekOption<'mem>

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impl<'mem> Unpin for PeekOption<'mem>

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impl<'mem> UnwindSafe for PeekOption<'mem>

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> 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<P, T> Receiver for P
where P: Deref<Target = T> + ?Sized, T: ?Sized,

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type Target = T

🔬This is a nightly-only experimental API. (arbitrary_self_types)
The target type on which the method may be called.
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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.