Awesome

The objective of this project is to understand John Tromp's 2012 IOCCC entry.

Done

• Refactor and understand the interpreter from https://tromp.github.io/cl/uni.c
• Replace manual reference counting with shared_ptr
• Add call-by-need optimization (<cite>Winebarger2003's L machine</cite>)
• Add "collapse marker" optimization (<cite>Winebarger2003's C machine</cite>)
• Add "eager dereferncing" optimization (<cite>Winebarger2003's S machine</cite>)
• Refactor and understand the following programs:
  • reverse
  • inflate
  • quine

Todo

• Refactor and understand the following programs:
  • uni
  • primes
  • uni8
  • bf
  • sort
  • oddindices
  • deflate
  • parse

Usage

uni is an interpreter for binary lambda calculus based on the Krivine machine. It reads from standard input a program description followed by input for the program, and output the result to the standard output.

It supports the following options:

• -B: byte mode (default)
• -b: binary mode
• -o: enable all optmizations
• -l: enable call-by-need optimization
• -c: enable "collapse marker" optimization
• -s: enable "eager dereferncing" optimization