RegexGenerator.php
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RegexGenerator.php
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	<?php
	namespace Eris\Generator;

	use BadFunctionCallException;
	use Eris\Generator;
	use Eris\Generators;
	use Eris\Random\RandomRange;
	use ReverseRegex\Lexer;
	use ReverseRegex\Random\SimpleRandom;
	use ReverseRegex\Parser;
	use ReverseRegex\Generator\Scope;

	/**
	* Note * and + modifiers cause an unbounded number of character to be generated
	* (up to plus infinity) and as such they are not supported.
	* Please use {1,N} and {0,N} instead of + and *.
	*
	* @param string $expression
	* @return Generator\RegexGenerator
	*/
	function regex($expression)
	{
	return Generators::regex($expression);
	}

	/**
	* @template-implements Generator<string>
	*/
	class RegexGenerator implements Generator
	{
	private $expression;

	public function __construct($expression)
	{
	if (!class_exists("ReverseRegex\Parser")) {
	throw new BadFunctionCallException("Please install the suggested dependency icomefromthenet/reverse-regex to run this Generator.");
	}
	$this->expression = $expression;
	}

	public function __invoke($_size, RandomRange $rand)
	{
	$lexer = new Lexer($this->expression);
	$gen = new SimpleRandom($rand->rand());
	$result = null;

	$parser = new Parser($lexer, new Scope(), new Scope());
	$parser->parse()->getResult()->generate($result, $gen);

	return GeneratedValueSingle::fromJustValue($result, 'regex');
	}

	public function shrink(GeneratedValue $value)
	{
	return $value;
	}
	}