This project aims to provide tools for easy code generation and manipulation. Since we're relying on metaprogramming for a lot of our libraries (Doctrine, Symfony, etc), generating code for this may get a bit tedious. This library aims to provide easy code generation for:

• General purpose PHP files and classes
• Doctrine entities
• Symfony bundles
• An alternate implementation for the symfony container builder

Currently, the library is still under development, and if you want to know what's up or would like to help, let me know! You can create issues here, or contact me directly at [email protected].

Melp\Cg provides a document-oriented approach to generating and inflecting code. Applying changes to code can easily be implemented using the provided visitor implementation. This makes both the generation and the use of the code generator very easy and understandable. The aim is to create a simple yet powerful interface to easily generate but also modify existing code.

A builder pattern is provided for quick structural setup, for example:

<?php

echo (string)
    (new Buffer())->append(
        new Builder()
            ->file()
                ->docComment()
                    ->author('Gerard van Helden <[email protected]>')
                ->end()
                ->namespacex('foo\\bar')
                    ->functionx('div')
                        ->arg()
                            ->name('a')
                        ->end()
                        ->arg()
                            ->name('b')
                        ->end()
                        ->raw('return $a / $b;')->end()
                    ->end()
                ->end()
            ->peek()
    );
;

Renders the following code:

<?php
/**
 * @author Gerard van Helden <[email protected]>
 */
namespace foo\bar
{
    function div($a, $b)
    {
        return $a / $b;
    }
}

There are some default visitors available which help you with the most common of tasks, for example, applying the SingleNamespaceVisitor would cause the namespace to be a single statement on top of the file, if there is only one namespace configured:

use Melp\Cg\Common\Buffer;
use Melp\Cg\Common\Iterator\Traverser;
use Melp\Cg\Php\Builder;
use Melp\Cg\Php\Visitor\SingleNamespaceVisitor;

$node = (new Builder())
    ->file()
        ->namespacex('foo\\bar')
            ->raw('// This is part of the namespace' . PHP_EOL)->end()
        ->end()
    ->peek();

$buffer = new Buffer();
echo (string)$buffer->append($node);

$traverser = new Traverser();
$traverser->addVisitor(new SingleNamespaceVisitor());
$traverser->traverse($node);

$buffer->reset();
echo (string)$buffer->append($node);

Renders:

<?php
namespace foo\bar
{
    // This is part of the namespace
}
<?php
namespace foo\bar;
// This is part of the namespace

You can get an inflectable document by using the included parser library which parses the general structure of a document.