Unicode support modules for Rust. All of these are available on crates.io.
unicode-normalization [doc] - This crate provides functions for normalization of Unicode strings, including Canonical and Compatible Decompositions and Recompositions, as described in Unicode Standard Annex #15.
unicode-segmentation [doc] - This crate determines Grapheme Cluster and Word boundaries according to Unicode Standard Annex #29 rules.
unicode-width [doc] - This crate determines the displayed width of char and str types according to Unicode Standard Annex #11 rules.
unicode-xid [doc] - This crate determines if a char has the XID_Start or XID_Continue property according to Unicode Standard Annex #31 rules.