//! `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 //! //! ```rust //! 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.
/// These are temporary compatability reexports that will be removed /// in a future version. pubtype TinyStr4 = TinyAsciiStr<4>; /// These are temporary compatability reexports that will be removed /// in a future version. pubtype TinyStr8 = TinyAsciiStr<8>; /// These are temporary compatability reexports that will be removed /// in a future version. pubtype TinyStr16 = TinyAsciiStr<16>;
#[test] fn test_size() {
assert_eq!(
core::mem::size_of::<TinyStr4>(),
core::mem::size_of::<Option<TinyStr4>>()
);
assert_eq!(
core::mem::size_of::<TinyStr8>(),
core::mem::size_of::<Option<TinyStr8>>()
);
} // /// Allows unit tests to use the macro // #[cfg(test)] // mod tinystr { // pub use super::{TinyAsciiStr, TinyStrError}; // }
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