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Sic: Yet Another Mediocre Lisp Dialect in C++

The other day, I had an interesting realization about modern C++. One thing led to another and here I am with another Lisp dialect. Sorry about that.

Why?

It seemed like a good idea at the time.

What's it good for?

¯\_(ツ)_/¯

Also,

1. It's simple.

Most Lispish languages care about fripperies like efficiency and so will internally convert Lisp(ish) expressions to more efficient forms.

Not Sic. Here, it's still a list. If you prod at one with lldb, you can chase the pointers. (Don't though; call function po on it instead.) It stays Lispy all the way down.

2. It integrates nicely with C++

Everything in Sic is a plain old C++ type, so you can easily move between it and native code. In fact, this:

$(print, "2 + 2 =", $(add, 2, 2), "\n")

is a valid C++ expression that does what you'd expect (if you've imported the sic namespace). So it's easy to integrate it into a C++ program.

3. No external files needed

Unlike most Lispish language, there is no external library; all functions are written in C++.

4. You can horrify Lisp purists with it.

$(print, "C++ is an acceptable Lisp!\n")

What's wrong with it?

  1. There's a lot of powerful Lisp(ish) functionality that isn't written yet.
  2. There's no garbage collection. It just leaks memory.

Compiling

On a sufficiently Unix-like operating system with Clang installed, just

cd src
make

If you want to use gcc instead, edit the Makefile first.

Note that this needs a recent compiler, one that supports C++17.

This will produce both an executable interpreter (sic) and a library (libsic.a).

Documentation

The reference manual is generated during building but there's a courtesy copy here.

I also did a blog post about it here.

License

This is Free/Open-source software released under the terms of the wxWidgets license (i.e. the GNU LGPL but with less restrictions on binary distribution.)

See Copyright.txt for details.

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Yet Another Mediocre Small Lisp Dialect in C++

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