Tracking Issue for `int_from_ascii`

[niklasf]

Feature gate: #![feature(int_from_ascii)]

This is a tracking issue for int_from_ascii, providing equivalent methods to {usize,u8,u16,u32,u64,u128,isize,i8,i16,i32,i64,i128}::from_str() and from_str_radix() that allow working directly on byte slices, in order to skip UTF-8 validation.

Public API

For each integer type T (usize, u8, u16, u32, u64, u128, isize, i8, i16, i32, i64, i128):

// core::num

impl T {
    pub const fn from_ascii(src: &[u8]) -> Result<T, ParseIntError>;
    pub const fn from_ascii_radix(src: &[u8], radix: u32) -> Result<T, ParseIntError>;
}

impl NonZero<T> {
    pub const fn from_ascii(src: &[u8]) -> Result<Self, ParseIntError>;
    pub const fn from_ascii_radix(src: &[u8], radix: u32) -> Result<Self, ParseIntError>;
}

Steps / History

• Abandoned implementation: Implement int_from_ascii_radix #105206
• API change proposal: Add from_bytes_radix function libs-team#469
• Implementation for T: Implement int_from_ascii (#134821) #134824
• Implementation for NonZero<T>: feat: Implement int_from_ascii for NonZero<T> #152267
• Final comment period (FCP)¹
• Stabilization PR

Unresolved Questions

• Stabilize Tracking Issue for nonzero_from_str_radix #152193 first

Footnotes

1. https://std-dev-guide.rust-lang.org/feature-lifecycle/stabilization.html ↩

[niklasf]

Opened PR #134824 with an implementation.