Sharade - In progress

This is a simple functional nondeterministic language that combines share and no-share semantics.

This language serves as a frontend of monadic programming in Haskell and the explicit-sharing library of Sebastian Fischer.

Specifications

This language supports

• Lazy evaluation
• Pattern matching
• High-order functions
• Non-determinism
• Share semantics

Installation

This guide assumes that you have cabal and haskell interpreter installed.

First of all, you have to install a specific version of a package that does not exists on Hackage, https://github.com/ManuelVs/explicit-sharing. The original author, Sebastian Fischer, has not updated the library to the modern Haskell language (as of 2019). You can install that package this way:

# Choose one of the following!
git clone [email protected]:ManuelVs/explicit-sharing.git
# git clone https://github.com/ManuelVs/explicit-sharing
cabal update
cabal sdist
cabal install dist/explicit-sharing*.tar.gz
cabal clean # this is optional

Now, you are prepared to clone, build and install this project:

# Choose one of the following!
git clone [email protected]:ManuelVs/Sharade.git
# git clone https://github.com/ManuelVs/Sharade.git
cabal update
cabal sdist
cabal install dist/Sharade*.tar.gz
cabal clean # this is optional

Cabal should put on the PATH a program called Sharade, which can compile programs written in Sharade into Haskell. In case you can not execute it, you maybe can find it on /home/username/.cabal/bin.

Usage

The workflow is very simple:

• Write a program in this language
• Compile it to Haskell by running

  Sharade file

• Launch a Haskell interpreter and load it! In this earlier versions, the module generated does not export friendly-functions to work with. You should use it this way:

  -- Imagine you have in Sharade the following function:
  mRepeat a = a ? mRepeat (a + 1) ;
  
  -- In Haskell, you can use the function this way:
  > unsafeResults $ mRepeat <#> (return 1)

Examples

The examples can be found on /code_examples folder.

Issues report

You can report issues by using the GitHub - standard way or by sending me an email to [email protected].