"The C programming language has been around for a long time and is still used a lot nowadays. The core of the language is very solid, but other aspects are showing their age. C2 attempts to modernize these parts, while keeping the feel of C. It should be seen as an evolution of C."

design goals

This philosophy leads to the following design goals:

  • higher development speed
  • same/better speed of execution
  • better compilation times
  • integrated build system
  • stricter syntax (easier for tooling)
  • great tooling (formatting tool, graphical refactoring tool)
  • easy integration with C libraries
  • should be easy to learn for C programmers
  • should help to avoid common mistakes

As such, since C2 is an evolution of C, it has explicit non goals:

  • higher-level features (like object-orientation, garbage collection, etc.)
  • to be a completely new language


So Why would you choose C2 over C?

  • faster development. Our tests show around 30% decrease in development time!!
  • easy access to features like LTO (link-time optimization)
  • better diagnostics (which, again, speeds up development)
  • easier control over architecture with c2reto


New programming languages appear quite frequently nowadays. For example D, Rust, Go, Swift, just to name a few of the big names. Each of these try to solve problems in a specific domain. For example, both D and Rust aim to be system-level programming languages, so a valid alternative to C++.

C2 aims to be used for problems where currently C would be used. So low-level programs like bootloaders, kernels, drivers and system-level tooling.

programming language evolution


In the programming language development, there has been a trend towards more, higher-level, abstractions. Java and C# especially reflect this trend. For system-level languages, D and Rust have strayed away from this trend, to provide better performance and control. For a system-level language, the features offered by C++, D and Rust are very suitable. However, they do not seem to fill the gap for low-level/embedded programs, since these are often still programmed in C. This gap is exactly the one C2 attempts to fill.