lexical-write-integer 1.0.2

Efficient formatting of integers to strings.
Documentation 
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//! Wrapper around indexing for opt-in, additional safety.
//!
//! By default, writers tend to be safe, due to Miri, Valgrind,
//! and other tests and careful validation against a wide range
//! of randomized input. Parsers are much trickier to validate.

// `index_unchecked_mut`'s 2nd arm is unused in `compact`.
#![cfg_attr(feature = "compact", allow(unused_macros, unused_macro_rules))]
#![doc(hidden)]

/// Index a buffer and get a mutable reference, without bounds checking.
// The `($x:ident[$i:expr] = $y:ident[$j:expr])` is not used with `compact`.
// The newer version of the lint is `unused_macro_rules`, but this isn't
// supported until nightly-2022-05-12.
#[allow(unknown_lints, unused_macro_rules)]
macro_rules! index_unchecked_mut {
    ($x:ident[$i:expr]) => {
        *$x.get_unchecked_mut($i)
    };

    ($x:ident[$i:expr] = $y:ident[$j:expr]) => {
        *$x.get_unchecked_mut($i) = *$y.get_unchecked($j)
    };
}