1 files changed, 70 insertions, 0 deletions
diff --git a/third_party/rust/unic-langid/README.md b/third_party/rust/unic-langid/README.md
new file mode 100644
index 0000000000..4ec1f31950
--- /dev/null
+++ b/third_party/rust/unic-langid/README.md
@@ -0,0 +1,70 @@
+# unic-langid [![Build Status](https://travis-ci.org/zbraniecki/unic-locale.svg?branch=master)](https://travis-ci.org/zbraniecki/unic-locale) [![Coverage Status](https://coveralls.io/repos/github/zbraniecki/unic-locale/badge.svg?branch=master)](https://coveralls.io/github/zbraniecki/unic-locale?branch=master)
+
+`unic-langid` is an API for managing [Unicode Language Identifiers](http://unicode.org/reports/tr35/#Unicode_language_identifier).
+
+The crate provides a way to create a struct from a string, manipulate its fields, canonicalize it, and serialize into a string.
+
+Usage
+-----
+
+```rust
+use unic_langid::LanguageIdentifier;
+
+let loc: LanguageIdentifier = "en-US".parse().expect("Parsing failed.");
+
+assert_eq!(loc.language(), "en");
+assert_eq!(loc.script(), None);
+assert_eq!(loc.region(), Some("US"));
+
+loc.set_script(Some("latn"));
+
+assert_eq!(&loc.to_string(), "en-Latn-US");
+```
+
+```rust
+use unic_langid::LanguageIdentifier;
+
+let langid = LanguageIdentifier::from_parts(
+    Some("en"),
+    None,
+    None,
+    Some(&["nedis", "macos"])
+).expect("Parsing failed.");
+
+assert_eq!(&langid.to_string(), "en-macos-nedis")
+```
+
+Macros
+------
+
+`unic-langid` can be also compiled with `features = ["macros"]` which enables `langid!` macro:
+
+```rust
+use unic_langid::langid;
+
+// The `const` assignment will currently work only
+// if the langid doesn't contain any variants.
+const EN_US: LanguageIdentifier = langid!("en-US");
+
+fn main() {
+    let de_at = langid!("de-AT");
+
+    assert_eq!(&de_at.to_string(), "de-AT")
+    assert_eq!(&EN_US.to_string(), "en-US")
+}
+```
+
+The macro allows for compile-time parsing and validation of literal language identifiers.
+
+Status
+------
+
+The crate is mostly complete on the `well-formed` level. The next batch of work will go into
+API maturity.
+
+Get Involved
+------------
+
+`unic-langid` is open-source, licensed under the Apache License, Version 2.0.  We
+encourage everyone to take a look at our code and we'll listen to your
+feedback.