Interactive GCC (igcc) is a read-eval-print loop (REPL) for C/C++

This should perhaps have &quot;(2009)&quot; in the title; it is a fork of <a href="http:&#x2F;&#x2F;www.artificialworlds.net&#x2F;wiki&#x2F;IGCC&#x2F;IGCC" rel="nofollow noreferrer">http:&#x2F;&#x2F;www.artificialworlds.net&#x2F;wiki&#x2F;IGCC&#x2F;IGCC</a> . Andy Balaam worked on the original IGCC 2009, 2012. Alexandru Dina worked on this fork 2018-2021. The fork seems to be mostly minor modernization, and adding color.<p>It works by compiling and re-running the whole session each time and assuming that it only printed `n` bytes last time but printed `n+m` bytes this time, that it should only show the user the newest `m` bytes.

Similar to Cling[1] from ROOT.<p>[1] <a href="https:&#x2F;&#x2F;github.com&#x2F;root-project&#x2F;cling">https:&#x2F;&#x2F;github.com&#x2F;root-project&#x2F;cling</a>

The real deal, or is it yet another one of those Potemkin REPLs that append code to a temporary file, compile it and diff standard output?

&gt; Compile errors can be tolerated until the code works<p>Huh, that&#x27;s not really great. You kind of want (1) the REPL to be syntax-aware, and not feed loops into the compiler until they&#x27;re syntactically complete (with a multi-line editor) and (2) to reject input that causes the overall program to fail to compile.

Perhaps noise and wasted compile attempts could be reduced by having a simple counting mechanism for {}, (), and []. This wouldn&#x27;t be correct if the program uses macros with unbalanced characters, but that&#x27;s rare, so I suppose it would suffice to allow the user to turn it off.<p>So a compile wouldn&#x27;t be attempted if there are obvious unbalanced braces.

Coming to C++ from python had me looking for something like this for a long time, but I&#x27;ve come to embrace my little single-file &quot;replit.sln&quot; which has proven to be much more flexible anyway.

gdb has always been my go-to repl for C&#x2F;C++

I&#x27;ll give an unpaid plug to <a href="https:&#x2F;&#x2F;www.softintegration.com&#x2F;" rel="nofollow noreferrer">https:&#x2F;&#x2F;www.softintegration.com&#x2F;</a> for their Ch product, which is beyond excellent (and has existed for a very long time.) Clang-Repl&#x2F;Cling is, however, nice to see, especially as it is open source.

Is it possible integrate this in a notebook environment? This would be amazing for teaching C&#x2F;C++.

&gt; using namespace std;<p>Good god.