stdx/
str.rs

1#![allow(unsafe_code)]
2
3use crate::sealed::Sealed;
4
5#[derive(Debug, thiserror::Error)]
6#[error("invalid ascii str")]
7pub struct AsciiError {}
8
9#[derive(Debug, thiserror::Error)]
10#[error("invalid utf8 str")]
11pub struct Utf8Error {}
12
13pub trait StrExt: Sealed {
14    fn from_ascii_simd(bytes: &[u8]) -> Result<&str, AsciiError>;
15
16    fn from_utf8_simd(bytes: &[u8]) -> Result<&str, Utf8Error>;
17}
18
19impl Sealed for str {}
20
21impl StrExt for str {
22    fn from_ascii_simd(bytes: &[u8]) -> Result<&str, AsciiError> {
23        // TODO(blocking): use `unicode_simd::from_ascii`
24        if bytes.is_ascii() {
25            Ok(unsafe { core::str::from_utf8_unchecked(bytes) })
26        } else {
27            Err(AsciiError {})
28        }
29    }
30
31    fn from_utf8_simd(bytes: &[u8]) -> Result<&str, Utf8Error> {
32        simdutf8::basic::from_utf8(bytes).map_err(|_| Utf8Error {})
33    }
34}
stdx/str.rs

stdx/
str.rs
