https://github.com/kaiepi/p6-failable

Failure sum type
https://github.com/kaiepi/p6-failable

Last synced: 1 day ago
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Failure sum type

• Host: GitHub
• URL: https://github.com/kaiepi/p6-failable
• Owner: Kaiepi
• License: artistic-2.0
• Created: 2019-07-12T03:11:09.000Z (over 5 years ago)
• Default Branch: master
• Last Pushed: 2022-01-08T11:37:35.000Z (almost 3 years ago)
• Last Synced: 2024-10-10T20:56:54.733Z (28 days ago)
• Language: Perl 6
• Size: 15.6 KB
• Stars: 1
• Watchers: 1
• Forks: 3
• Open Issues: 2
• Metadata Files:
  • Readme: README.md
  • Changelog: CHANGELOG
  • License: LICENSE

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README

        
[![Build Status](https://travis-ci.org/Kaiepi/p6-Failable.svg?branch=master)](https://travis-ci.org/Kaiepi/p6-Failable)

NAME

====

Failable - Failure sum type

SYNOPSIS

========

```perl6

use Failable;

sub cat(*@params --> Str:D) {

    my Proc:D $proc = run "cat", |@params, :out, :err;

    my Str:D  $out  = $proc.out.slurp(:close);

    my Str:D  $err  = $proc.err.slurp(:close);

    fail $err if $err;

    $out

}

my Failable[Str:D] $output = cat "/etc/hosts";

say $output.WHAT; # OUTPUT: (Str)

my Failable[Str:D] $error = cat '.';

say $error.WHAT; # OUTPUT: (Failure)

```

DESCRIPTION

===========

Failable is a class for creating Failure sum types. Parameterizing Failable creates a new subset of Failure and the parameter passed. This allows you to type variables that are declared using the return values of routines that can fail.

AUTHOR

======

Ben Davies (Kaiepi)

COPYRIGHT AND LICENSE

=====================

Copyright 2019 Ben Davies

This library is free software; you can redistribute it and/or modify it under the Artistic License 2.0.