tinystr

Crates.iotinystr
lib.rstinystr
version0.7.6
sourcesrc
created_at2019-08-10 03:37:58.905996
updated_at2024-05-28 19:58:51.669455
descriptionA small ASCII-only bounded length string representation.
homepage
repositoryhttps://github.com/unicode-org/icu4x
max_upload_size
id155532
size82,466
icu4x-release (github:unicode-org:icu4x-release)

documentation

README

tinystr crates.io

tinystr is a utility crate of the ICU4X project.

It includes [TinyAsciiStr], a core API for representing small ASCII-only bounded length strings.

It is optimized for operations on strings of size 8 or smaller. When use cases involve comparison and conversion of strings for lowercase/uppercase/titlecase, or checking numeric/alphabetic/alphanumeric, TinyAsciiStr is the edge performance library.

Examples

use tinystr::TinyAsciiStr;

let s1: TinyAsciiStr<4> = "tEsT".parse().expect("Failed to parse.");

assert_eq!(s1, "tEsT");
assert_eq!(s1.to_ascii_uppercase(), "TEST");
assert_eq!(s1.to_ascii_lowercase(), "test");
assert_eq!(s1.to_ascii_titlecase(), "Test");
assert!(s1.is_ascii_alphanumeric());
assert!(!s1.is_ascii_numeric());

let s2 = TinyAsciiStr::<8>::try_from_raw(*b"New York")
    .expect("Failed to parse.");

assert_eq!(s2, "New York");
assert_eq!(s2.to_ascii_uppercase(), "NEW YORK");
assert_eq!(s2.to_ascii_lowercase(), "new york");
assert_eq!(s2.to_ascii_titlecase(), "New york");
assert!(!s2.is_ascii_alphanumeric());

Details

When strings are of size 8 or smaller, the struct transforms the strings as u32/u64 and uses bitmasking to provide basic string manipulation operations:

  • is_ascii_numeric
  • is_ascii_alphabetic
  • is_ascii_alphanumeric
  • to_ascii_lowercase
  • to_ascii_uppercase
  • to_ascii_titlecase
  • PartialEq

TinyAsciiStr will fall back to u8 character manipulation for strings of length greater than 8.

More Information

For more information on development, authorship, contributing etc. please visit ICU4X home page.

Commit count: 3247

cargo fmt