"Use template metaprogramming only when you really need to"
― C++ Core Guidelines

mpl-lazyk is a monadic and impractical compile-time lazyk interpreter with template metaprogramming. This is achieved by implementing a simple parser combinator consisting of a monad transformer and either monad. The implementation and naming of many of these algebraic data structures is influenced by the programming language Haskell and category theory.

Build and run

$ cd app
$ make LAZYK_CODE='"(SKK)I"' INPUT='"Hello, world!"'
Hello, world!

Or inside the docker container...

$ docker-compose -f docker/docker-compose.yml run lazyk
Hello, world!
$ INPUT="Que Sera, Sera" LAZYK_CODE="(SKK)I" docker-compose -f docker/docker-compose.yml run lazyk
Que Sera, Sera
$ INPUT="Que Sera, Sera" LAZYK_CODE="****i*i*i*ii*ii*ii11111110001111111110000011111111100000" docker-compose -f docker/docker-compose.yml run lazyk
Que Sera, Sera

Build and run

$ cd tests
$ make

Or inside the docker container...

$ docker-compose -f docker/docker-compose.yml run test

• There is my blog post about this implementation (Japanese)
• If you enojoy this, write your impressions on reddit!