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Monthly Downloads: 11
Programming language: Haskell
License: BSD 3-clause "New" or "Revised" License
Tags: Miscellaneous     Language     Codec    

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README

Build Status Erlant/OTP Release

NOTE: Participation is encouraged! Make issues, ask questions, submit pull requests (even if it’s your first time contributing to open-source — you’ll get lots of help), and give feedback!

Erlang VM byte code assembler for implementing compile-to-beam languages. The goal is to a provide delightful API for generating BEAM instructions from pure Haskell.

Usage

This example writes a simple module to a file:

{-# LANGUAGE OverloadedStrings #-}
module Main where
import qualified Data.ByteString.Lazy as LBS

import Codec.Beam.Instructions (func_info, label, move, return')
import qualified Codec.Beam as Beam

main :: IO ()
main =
  LBS.writeFile "test_module.beam" $
    Beam.encode "test_module"
      [ Beam.export "tuple_of_one" 0
      ]
      [ label (Beam.Label 1)
      , func_info "tuple_of_one" 0
      , label (Beam.Label 2)
      , move (Beam.Tuple [Beam.Integer 1]) (Beam.X 0)
      , return'
      ]

After you run that program, you can load the resulting module from the Erlang shell!

$ erl
1> l(test_module).
2> test_module:tuple_of_one().
{1}

You can find an example project on GitHub.

Build

Use Stack:

stack build --test

Acknowledgements

Thanks to the following projects, which helped me understand the BEAM file format: