Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 53 insertions, 0 deletions

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+# tinystr [![crates.io](https://img.shields.io/crates/v/tinystr)](https://crates.io/crates/tinystr)
+
+`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.
+
+[`ICU4X`]: ../icu/index.html
+
+## More Information
+
+For more information on development, authorship, contributing etc. please visit [`ICU4X home page`](https://github.com/unicode-org/icu4x).