Crate tinystr

source ยท
Expand description

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.

ยงExamples

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());

ยงDetails

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.

Modulesยง

Macrosยง

Structsยง

Enumsยง

Type Aliasesยง

  • These are temporary compatability reexports that will be removed in a future version.
  • These are temporary compatability reexports that will be removed in a future version.
  • These are temporary compatability reexports that will be removed in a future version.