1 files changed, 31 insertions, 0 deletions
diff --git a/library/core/src/unicode/mod.rs b/library/core/src/unicode/mod.rs
new file mode 100644
index 000000000..72fa059b7
--- /dev/null
+++ b/library/core/src/unicode/mod.rs
@@ -0,0 +1,31 @@
+#![unstable(feature = "unicode_internals", issue = "none")]
+#![allow(missing_docs)]
+
+pub(crate) mod printable;
+mod unicode_data;
+
+/// The version of [Unicode](https://www.unicode.org/) that the Unicode parts of
+/// `char` and `str` methods are based on.
+///
+/// New versions of Unicode are released regularly and subsequently all methods
+/// in the standard library depending on Unicode are updated. Therefore the
+/// behavior of some `char` and `str` methods and the value of this constant
+/// changes over time. This is *not* considered to be a breaking change.
+///
+/// The version numbering scheme is explained in
+/// [Unicode 11.0 or later, Section 3.1 Versions of the Unicode Standard](https://www.unicode.org/versions/Unicode11.0.0/ch03.pdf#page=4).
+#[stable(feature = "unicode_version", since = "1.45.0")]
+pub const UNICODE_VERSION: (u8, u8, u8) = unicode_data::UNICODE_VERSION;
+
+// For use in liballoc, not re-exported in libstd.
+pub use unicode_data::{
+    case_ignorable::lookup as Case_Ignorable, cased::lookup as Cased, conversions,
+};
+
+pub(crate) use unicode_data::alphabetic::lookup as Alphabetic;
+pub(crate) use unicode_data::cc::lookup as Cc;
+pub(crate) use unicode_data::grapheme_extend::lookup as Grapheme_Extend;
+pub(crate) use unicode_data::lowercase::lookup as Lowercase;
+pub(crate) use unicode_data::n::lookup as N;
+pub(crate) use unicode_data::uppercase::lookup as Uppercase;
+pub(crate) use unicode_data::white_space::lookup as White_Space;