C3 is a programming language that is an evolution of C, enabling the same
paradigms and retaining the same syntax as far as possible.

It introduces module namespacing, generic modules, optional-based error
handling, defer, slices, compile-time evaluation, contracts, and built-in
support for foreign function interfaces, while staying binary compatible
with C and keeping the low-level control C programmers expect.

c3c is the C3 compiler, using LLVM as its backend.