https://github.com/monadfix/named

Named parameters (keyword arguments) for Haskell
https://github.com/monadfix/named

haskell

Last synced: 3 months ago
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Named parameters (keyword arguments) for Haskell

• Host: GitHub
• URL: https://github.com/monadfix/named
• Owner: monadfix
• License: other
• Created: 2018-02-01T12:13:49.000Z (over 7 years ago)
• Default Branch: master
• Last Pushed: 2025-03-16T09:19:53.000Z (4 months ago)
• Last Synced: 2025-03-28T05:12:02.183Z (4 months ago)
• Topics: haskell
• Language: Haskell
• Size: 44.9 KB
• Stars: 94
• Watchers: 6
• Forks: 5
• Open Issues: 9
• Metadata Files:
  • Readme: README.md
  • Changelog: ChangeLog.md
  • License: LICENSE

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README

        
# `named` – keyword arguments for Haskell

[![Hackage](https://img.shields.io/hackage/v/named.svg)](https://hackage.haskell.org/package/named)

`named` is a lightweight library for named function parameters (keyword

arguments) based on overloaded labels. Keyword arguments have several

advantages over positional arguments:

* they can be supplied in arbitrary order

* their names serve as documentation at call site

* it is impossible to accidentally mix them up

Unlike newtype wrappers, keyword arguments don't pollute the global

namespace, don't require top-level definitions, and don't need to be

exported.

This implementation of named parameters is typesafe, provides good type

inference, descriptive type errors, and has no runtime overhead.

Example usage:

```haskell

import Named

createSymLink :: "from" :! FilePath -> "to" :! FilePath -> IO ()

createSymLink (Arg from) (Arg to) = ...

main = createSymLink ! #from "/path/to/source"

                     ! #to "/target/path"

```