https://github.com/mihaimaruseac/io-manager

Haskell IO manager for hiding the IO monad and related advanced concepts. Useful for beginners.
https://github.com/mihaimaruseac/io-manager

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Last synced: 4 months ago
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Haskell IO manager for hiding the IO monad and related advanced concepts. Useful for beginners.

• Host: GitHub
• URL: https://github.com/mihaimaruseac/io-manager
• Owner: mihaimaruseac
• License: bsd-3-clause
• Created: 2013-02-12T14:51:23.000Z (over 12 years ago)
• Default Branch: master
• Last Pushed: 2025-03-18T12:44:30.000Z (4 months ago)
• Last Synced: 2025-03-18T13:44:10.165Z (4 months ago)
• Topics: hacktoberfest
• Language: Haskell
• Homepage:
• Size: 338 KB
• Stars: 7
• Watchers: 4
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE
  • Security: SECURITY.md

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README

        
# io-manager [![Hackage](https://img.shields.io/hackage/v/io-manager.svg?style=flat)](https://hackage.haskell.org/package/io-manager) [![Haskell Cabal](https://github.com/mihaimaruseac/io-manager/actions/workflows/presubmit-cabal.yaml/badge.svg)](https://github.com/mihaimaruseac/io-manager/actions/workflows/presubmit-cabal.yaml) [![Haskell Stack](https://github.com/mihaimaruseac/io-manager/actions/workflows/presubmit-stack.yaml/badge.svg)](https://github.com/mihaimaruseac/io-manager/actions/workflows/presubmit-stack.yaml) [![OpenSSF Scorecard](https://api.securityscorecards.dev/projects/github.com/mihaimaruseac/io-manager/badge)](https://api.securityscorecards.dev/projects/github.com/mihaimaruseac/io-manager)

This is a simple framework which hides away the IO monad and allows beginner

students to write simple applications in Haskell without having to touch the

`IO` monad for reading or writing to standard file descriptors or other files.

This skeleton comes with a simple example showing the usage of this system. As

you can see, only three lines are to be copied by the student:

* the `module Main` one

* the `import Training.MM.IOManager` one

* the `main = wrapIO ..` one

Everything else is free of advanced concepts like monads, mutability,

strictness, etc.

This skeleton can be used to set up a homework which can then be automatically

tested using tools like [vmchecker][vmchecker]

Example

=======

The repository contains an example code in `SimpleEchoExample.hs`: a

demonstrative program which copies content from files (or `stdin`) to files

(or `stdout`) depending on a description written at `stdin`.

Run `make` (or the usual `cabal` setup) to build it and then give as arguments

the name of the files from which you want to read. Finish `stdin` with `EOF`

(`^D` on Linux, `^Z` on Windows).

Example:

    ./SimpleEchoExample Makefile M.out unused

    Makefile out_Makefile

    M.out out_Mout

    @stdin out_stdin

    @stdin @stdout

Due to Haskell's laziness, `unused` will not be read.

[vmchecker]: https://github.com/vmchecker/vmchecker "vmchecker"