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Uses old Rust 2015

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#1788 in Text processing

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The rust-unidecode library is a Rust port of Sean M. Burke's famous Text::Unidecode module for Perl. It transliterates Unicode strings such as "Æneid" into pure ASCII ones such as "AEneid." For a detailed explanation on the rationale behind using such a library, you can refer to both the documentation of the original module and this article written by Burke in 2001.

The data set used to translate the Unicode was ported directly from the Text::Unidecode module using a Perl script, so rust-unidecode should produce identical output.


extern crate unidecode;
use unidecode::unidecode;

assert_eq!(unidecode("Æneid"), "AEneid");
assert_eq!(unidecode("étude"), "etude");
assert_eq!(unidecode("北亰"), "Bei Jing");
assert_eq!(unidecode("ᔕᓇᓇ"), "shanana");
assert_eq!(unidecode("げんまい茶"), "genmaiCha ");

Guarantees and Warnings

Here are some guarantees you have when calling unidecode():

  • The String returned will be valid ASCII; the decimal representation of every char in the string will be between 0 and 127, inclusive.
  • Every ASCII character (0x0000 - 0x007F) is mapped to itself.
  • All Unicode characters will translate to a string containing newlines ("\n") or ASCII characters in the range 0x0020 - 0x007E. So for example, no Unicode character will translate to \u{01}. The exception is if the ASCII character itself is passed in, in which case it will be mapped to itself. (So '\u{01}' will be mapped to "\u{01}".)

There are, however, some things you should keep in mind:

  • As stated, some transliterations do produce \n characters.
  • Some Unicode characters transliterate to an empty string, either on purpose or because rust-unidecode does not know about the character.
  • Some Unicode characters are unknown and transliterate to "[?]".
  • Many Unicode characters transliterate to multi-character strings. For example, 北 is transliterated as "Bei ".

This information was paraphrased from the original Text::Unidecode documentation.

No runtime deps