The best example I know of is Papa Carlo:
<a href="http:&#x2F;&#x2F;lakhin.com&#x2F;projects&#x2F;papa-carlo&#x2F;" rel="nofollow">http:&#x2F;&#x2F;lakhin.com&#x2F;projects&#x2F;papa-carlo&#x2F;</a><p>I had been working on an incremental-compiler-generator in C++, but suspended the project recently because it&#x27;s a lot of work.