Struct NumBuffer 

pub struct NumBuffer<T>
where
    T: NumBufferTrait,
{
    pub(crate) buf: <T as NumBufferTrait>::Buf,
    phantom: PhantomData<T>,
}

Memory for formatting numbers using T::format_into().

This type consists of enough memory to hold the longest decimal string representation a number of type T could have. It is used only by calling format_into(); there is no other way to access its contents. Its purpose is to allow formatting numbers without involving the dynamic dispatch of the fmt system, which may be more efficient when fmt is not otherwise used.

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 as NumBufferTrait>::Buf

phantom: PhantomData<T>

Implementations

impl<T> NumBuffer<T>

where T: NumBufferTrait,

pub const fn new() -> NumBuffer<T>

Initializes internal buffer.

Trait Implementations

impl<T> Debug for NumBuffer<T>

where T: NumBufferTrait,

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

Formats the value using the given formatter.

impl<T> Default for NumBuffer<T>

where T: NumBufferTrait,

fn default() -> NumBuffer<T>

Returns the “default value” for a type.