ValuePointerType

Struct ValuePointerType 

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#[repr(C)]
pub struct ValuePointerType { pub mutable: bool, pub wide: bool, pub target: fn() -> &'static Shape, }
Expand description

Describes the raw/reference pointer

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§mutable: bool

Is the pointer mutable or not.

§wide: bool

Describes whether the pointer is wider or not

Note: if the pointer is wide, then the target shape will have ShapeLayout::Unsized, and the vtables of the target shape will expect the pointer to this pointer, rather than the resulting address of unsized data. This is because wide pointer’s metadata information is an undefined implementation detail, at this current moment.

See: https://github.com/rust-lang/rust/issues/81513

§target: fn() -> &'static Shape

Shape of the pointer’s pointee

This needs to be indirect (behind a function), in order to allow recursive types without overflowing the const-eval system.

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impl ValuePointerType

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

Returns the shape of the pointer’s pointee.

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impl Clone for ValuePointerType

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fn clone(&self) -> ValuePointerType

Returns a duplicate 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 ValuePointerType

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

Formats the value using the given formatter. Read more
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impl Copy for ValuePointerType

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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.