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Perl 6 Deep Dive

You're reading from  Perl 6 Deep Dive

Product type Book
Published in Sep 2017
Publisher Packt
ISBN-13 9781787282049
Pages 402 pages
Edition 1st Edition
Languages
Author (1):
Andrew Shitov Andrew Shitov
Profile icon Andrew Shitov

Table of Contents (15) Chapters

1. What is Perl 6? 2. Writing Code 3. Working with Variables and Built-in Data Types 4. Working with Operators 5. Control Flow 6. Subroutines 7. Modules 8. Object-Oriented Programming 9. Input and Output 10. Working with Exceptions 11. Regexes 12. Grammars 13. Concurrent Programming 14. Functional Programming 15. Reactive Programming

Promises

In the previous section, we were creating some code blocks that were running in parallel. Promises help to see the status of the completeness of such blocks. In Perl 6, promises are handled by the Promise class.

Creating a promise

To create a promise, just call the constructor of the Promise class:

my $promise = Promise.new();

The created object does nothing yet. In the Factory methods section later in this chapter, we will see how to create a promise that executes some code. Meanwhile, let's see the properties that a promise has.

Statuses of a promise

The...

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