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NumBuffer

Struct NumBuffer 

1.98.0 · Source
pub struct NumBuffer<T: NumBufferTrait> {
    pub(crate) buf: T::Buf,
    phantom: PhantomData<T>,
}
Expand description

A buffer wrapper of which the internal size is based on the maximum number of digits the associated integer can have.

§Examples

use core::fmt::NumBuffer;

let mut buf = NumBuffer::new();
let n1 = 1972u32;
assert_eq!(n1.format_into(&mut buf), "1972");

// Formatting a negative integer includes the sign.
let mut buf = NumBuffer::new();
let n2 = -1972i32;
assert_eq!(n2.format_into(&mut buf), "-1972");

Fields§

§buf: T::Buf§phantom: PhantomData<T>

Implementations§

1.98.0 · Source§

impl<T: NumBufferTrait> NumBuffer<T>

1.98.0 (const: 1.98.0) · Source

pub const fn new() -> Self

Initializes internal buffer.

Trait Implementations§

1.98.0 · Source§

impl<T: NumBufferTrait> Debug for NumBuffer<T>

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

Formats the value using the given formatter. Read more

Auto Trait Implementations§

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impl<T> Freeze for NumBuffer<T>
where <T as NumBufferTrait>::Buf: Freeze,

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impl<T> RefUnwindSafe for NumBuffer<T>

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impl<T> Send for NumBuffer<T>
where <T as NumBufferTrait>::Buf: Send, T: Send,

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impl<T> Sync for NumBuffer<T>
where <T as NumBufferTrait>::Buf: Sync, T: Sync,

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impl<T> Unpin for NumBuffer<T>
where <T as NumBufferTrait>::Buf: Unpin, T: Unpin,

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impl<T> UnsafeUnpin for NumBuffer<T>

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impl<T> UnwindSafe for NumBuffer<T>

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> SizeHint for T
where T: ?Sized,

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default fn lower_bound(&self) -> usize

🔬This is a nightly-only experimental API. (core_io_internals)
Returns a lower bound on the number of elements this container-like item contains. For example, an array [u8; 12] could return any value between 0 and 12 inclusively as a correct implementation. Read more
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default fn upper_bound(&self) -> Option<usize>

🔬This is a nightly-only experimental API. (core_io_internals)
Returns an upper bound on the number of elements this container-like item contains if it can be determined, otherwise None. Read more
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final fn size_hint(&self) -> (usize, Option<usize>)

🔬This is a nightly-only experimental API. (core_io_internals)
Returns an estimate for the number of elements this container like type contains. Read more
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impl<T> SizedTypeProperties for T

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#[doc(hidden)]
const SIZE: usize = _

🔬This is a nightly-only experimental API. (sized_type_properties)
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#[doc(hidden)]
const ALIGN: usize = _

🔬This is a nightly-only experimental API. (sized_type_properties)
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#[doc(hidden)]
const ALIGNMENT: Alignment = _

🔬This is a nightly-only experimental API. (ptr_alignment_type #102070)
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#[doc(hidden)]
const IS_ZST: bool = _

🔬This is a nightly-only experimental API. (sized_type_properties)
true if this type requires no storage. false if its size is greater than zero. Read more
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#[doc(hidden)]
const LAYOUT: Layout = _

🔬This is a nightly-only experimental API. (sized_type_properties)
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#[doc(hidden)]
const MAX_SLICE_LEN: usize = _

🔬This is a nightly-only experimental API. (sized_type_properties)
The largest safe length for a [Self]. 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.