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
- A fixed-length bytes array that is expected to be an ASCII string but does not enforce that invariant.
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.