1 files changed, 51 insertions, 0 deletions
diff --git a/third_party/rust/tinystr/src/lib.rs b/third_party/rust/tinystr/src/lib.rs
new file mode 100644
index 0000000000..ba317ac8f6
--- /dev/null
+++ b/third_party/rust/tinystr/src/lib.rs
@@ -0,0 +1,51 @@
+//! `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.
+//!
+//! # Example
+//!
+//! ```
+//! use tinystr::{TinyStr4, TinyStr8};
+//!
+//! fn main() {
+//!     let s1: TinyStr4 = "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_eq!(s1.is_ascii_alphanumeric(), true);
+//!
+//!     let s2: TinyStr8 = "New York".parse()
+//!         .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.is_ascii_alphanumeric(), false);
+//! }
+//! ```
+mod helpers;
+mod tinystr16;
+mod tinystr4;
+mod tinystr8;
+
+pub use tinystr16::TinyStr16;
+pub use tinystr4::TinyStr4;
+pub use tinystr8::TinyStr8;
+
+/// Enum to store the various types of errors that can cause parsing a TinyStr to fail.
+#[derive(PartialEq, Eq, Debug)]
+pub enum Error {
+    /// String is too large or too small to store as TinyStr.
+    InvalidSize,
+    /// String is empty.
+    InvalidNull,
+    /// String contains non-ASCII character(s).
+    NonAscii,
+}