OCaml effects examples

Examples to illustrate the use of algebraic effects in OCaml. See

• Effective Concurrency with Algebraic Effects
• Pearls of Algebraic Effects and Handlers

Examples

• A concurrent round-robin scheduler
• Mutable state
• ML-style refs
• Transactional state
• Asynchronous IO in direct-style
• Delimcc encoding
• Dynamic wind
• Deriving generator from any interator
• Promises
• Backtracking N-Queens
• Monadic reflection
• MVars
• Chameneos-redux
• Memoization
• Nondeterminism
• A mathematical game: Nim
• Message-passing pipeline: Sieve of Eratostheneses
• Deep pipes
• Non termination from effects
• Continuation cloning is tricky
• A solution to the Same Fringe Problem
• Reverse-mode Algorithmic Differentiation

Running the examples

Follow the instructions to install Multicore OCaml. Then,

$ opam install dune lwt
$ make

This builds all of the examples.

External examples

These are other examples that utilise OCaml effect handlers that are not in this repo:

• Reactive UI and animation
• Probabilisitic Programming
  • and the project report