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The Hoa\Visitor library. 2017-01-16 07:02 UTC



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Hoa is a modular, extensible and structured set of PHP libraries.
Moreover, Hoa aims at being a bridge between industrial and research worlds.


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This library provides interfaces to apply the visitor pattern.

Learn more.


With Composer, to include this library into your dependencies, you need to require hoa/visitor:

$ composer require hoa/visitor '~2.0'

For more installation procedures, please read the Source page.


Before running the test suites, the development dependencies must be installed:

$ composer install

Then, to run all the test suites:

$ vendor/bin/hoa test:run

For more information, please read the contributor guide.

Quick usage

We propose to explain the basis of this library. We have two entities: an element to visit and a visitor, for example a node of a tree and a dumper. The element to visit will implement the Hoa\Visitor\Element interface and the visitor will implement the Hoa\Visitor\Visit interface. The first one will ask to implement the accept method in order to define what data it holds will be visited. The second one will ask to implement the visit method which will contain the visitor computations. We will find several examples in Hoa libraries.


The hack book of Hoa\Visitor contains detailed information about how to use this library and how it works.

To generate the documentation locally, execute the following commands:

$ composer require --dev hoa/devtools
$ vendor/bin/hoa devtools:documentation --open

More documentation can be found on the project's website: hoa-project.net.

Getting help

There are mainly two ways to get help:


Do you want to contribute? Thanks! A detailed contributor guide explains everything you need to know.


Hoa is under the New BSD License (BSD-3-Clause). Please, see LICENSE for details.