asciifolding

Rust port of Lucene's Ascii folding filter

From Lucene documentation:

This class converts alphabetic, numeric, and symbolic Unicode characters which are not in the first 127 ASCII characters (the "Basic Latin" Unicode block) into their ASCII equivalents, if one exists.

Reference implementation

• https://github.com/apache/lucene-solr/blob/2ae4746365c1ee72a0047ced7610b2096e438979/lucene/analysis/common/src/java/org/apache/lucene/analysis/miscellaneous/ASCIIFoldingFilter.java

Thanks

• https://github.com/kaedroho/rusticsearch