Kaleidoscope

• e.g.

  # Compute the x'th fibonacci number.
  def fib(x)
    if x < 3 then
      1
    else
      fib(x-1)+fib(x-2)
  
  # This expression will compute the 40th number.
  fib(40)

• e.g. import external functions

  extern sin(arg);
  extern cos(arg);
  extern atan2(arg1 arg2);
  
  atan2(sin(.4), cos(42))

• constraints:

  • only datatype: double
  • no type declarations

Dev environment

• llvm@14
• Set environment variable LLVM_SYS_140_PREFIX to the path of llvm@14
  • Also set it at rust-analyzer.server.extraEnv and rust-analyzer.runnableEnv in settings.json if you use vscode

References

• https://llvm.org/docs/tutorial/MyFirstLanguageFrontend/index.html