1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103

//! `tinystr` is a small ASCII-only bounded length string representation.
//!
//! The crate is meant to be used for scenarios where one needs a fast
//! and memory efficient way to store and manipulate short ASCII-only strings.
//!
//! `tinystr` converts each string into an unsigned integer, and uses bitmasking
//! to compare, convert cases and test for common characteristics of strings.
//!
//! # Details
//!
//! The crate provides three structs and an enum:
//! * `TinyStr4` an ASCII-only string limited to 4 characters.
//! * `TinyStr8` an ASCII-only string limited to 8 characters.
//! * `TinyStr16` an ASCII-only string limited to 16 characters.
//! * `TinyStrAuto` (enum):
//!   * `Tiny` when the string is 16 characters or less.
//!   * `Heap` when the string is 17 or more characters.
//!
//! `TinyStrAuto` stores the string as a TinyStr16 when it is short enough, or else falls back to a
//! standard `String`. You should use TinyStrAuto when you expect most strings to be 16 characters
//! or smaller, but occasionally you receive one that exceeds that length. Unlike the structs,
//! `TinyStrAuto` does not implement `Copy`.
//!
//! # Macros
//!
//! Compile-time macros are available to convert string literals into const TinyStrs:
//! * `tinystr4!("abc")`
//! * `tinystr8!("abcdefg")`
//! * `tinystr16!("longer-string")`
//!
//! # no_std
//!
//! Disable the `std` feature of this crate to make it `#[no_std]`. Doing so disables `TinyStrAuto`.
//! You can re-enable `TinyStrAuto` in `#[no_std]` mode by enabling the `alloc` feature.
//!
//! # Example
//!
//! ```
//! use tinystr::{TinyStr4, TinyStr8, TinyStr16, TinyStrAuto};
//! use tinystr::{tinystr4, tinystr8, tinystr16};
//!
//! let s1: TinyStr4 = tinystr4!("tEsT");
//!
//! 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_eq!(s1.is_ascii_alphanumeric(), true);
//!
//! let s2: TinyStr8 = tinystr8!("New York");
//!
//! 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_eq!(s2.is_ascii_alphanumeric(), false);
//!
//! let s3: TinyStr16 = tinystr16!("metaMoRphosis123");
//!
//! assert_eq!(s3, "metaMoRphosis123");
//! assert_eq!(s3.to_ascii_uppercase(), "METAMORPHOSIS123");
//! assert_eq!(s3.to_ascii_lowercase(), "metamorphosis123");
//! assert_eq!(s3.to_ascii_titlecase(), "Metamorphosis123");
//! assert_eq!(s3.is_ascii_alphanumeric(), true);
//!
//! let s4: TinyStrAuto = "shortNoAlloc".parse()
//!     .expect("Failed to parse.");
//! assert!(matches!(s4, TinyStrAuto::Tiny { .. }));
//! assert_eq!(s4, "shortNoAlloc");
//!
//! let s5: TinyStrAuto = "longFallbackToHeap".parse()
//!     .expect("Failed to parse.");
//! assert!(matches!(s5, TinyStrAuto::Heap { .. }));
//! assert_eq!(s5, "longFallbackToHeap");
//! ```

#![no_std]

#[cfg(any(feature = "std", test))]
extern crate std;

#[cfg(all(not(feature = "std"), not(test)))]
extern crate core as std;

mod macros;
mod tinystr16;
mod tinystr4;
mod tinystr8;

/// Re-export of the low-level tinystr_macros crate, required by the macros.
pub use tinystr_macros as raw_macros;

#[cfg(any(feature = "std", feature = "alloc"))]
mod tinystrauto;

pub use tinystr16::TinyStr16;
pub use tinystr4::TinyStr4;
pub use tinystr8::TinyStr8;

#[cfg(any(feature = "std", feature = "alloc"))]
pub use tinystrauto::TinyStrAuto;

pub use tinystr_raw::Error;