hoa regex capturing groups

test.php

<?php

use PHPStan\ShouldNotHappenException;
use PHPStan\Type\Constant\ConstantArrayTypeBuilder;

require __DIR__ . '/vendor/autoload.php';

// 1. Read the grammar.
$grammar  = new Hoa\File\Read('hoa://Library/Regex/Grammar.pp');

// 2. Load the compiler.
$compiler = Hoa\Compiler\Llk\Llk::load($grammar);

// 3. Lex, parse and produce the AST.
$ast      = $compiler->parse('(\d\s(\w))');

// 4. Dump the result.
$dump     = new Hoa\Compiler\Visitor\Dump();
echo $dump->visit($ast);


/* OUTPUT

$ php test.php

$ php test.php
>  #expression
>  >  #concatenation
>  >  >  token(character_type, \d)
>  >  >  token(character_type, \s)
>  >  >  token(character_type, \w)


*/