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<?php
namespace Illuminate\Console;
use InvalidArgumentException;
use Symfony\Component\Console\Input\InputArgument;
use Symfony\Component\Console\Input\InputOption;
class Parser
{
    /**
     * Parse the given console command definition into an array.
     *
     * @param  string  $expression
     * @return array
     *
     * @throws \InvalidArgumentException
     */
    public static function parse(string $expression)
    {
        $name = static::name($expression);
        if (preg_match_all('/\{\s*(.*?)\s*\}/', $expression, $matches) && count($matches[1])) {
            return array_merge([$name], static::parameters($matches[1]));
        }
        return [$name, [], []];
    }
    /**
     * Extract the name of the command from the expression.
     *
     * @param  string  $expression
     * @return string
     *
     * @throws \InvalidArgumentException
     */
    protected static function name(string $expression)
    {
        if (! preg_match('/[^\s]+/', $expression, $matches)) {
            throw new InvalidArgumentException('Unable to determine command name from signature.');
        }
        return $matches[0];
    }
 
 
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