This is an implementation of UNIX sed(1) by Nina.
The target language is C#, and this runs on Windows or Mono.
This implementation supports orginal sed.
This implementation consists of the sources shown as follows.
The regular expression is basic regular expression,
and alternation(\|), repatition more than one word(\+) and optional(\?) are extended.
The engine is a "NFA" engine in the sense of the book "Mastering Regular Expressions" by Jeffrey E.F. Friedl.
If mono and make are available, you can build by Makefile included in downloaded zip file.