{

/**

public static function parse(string $expression): array

{

$name = static::name($expression);

if (preg_match_all('/\{\s*(.*?)\s*\}/', $expression, $matches)) {

if (count($matches[1])) {

return array_merge([$name], static::parameters($matches[1]));

}

}

return [$name, [], []];

}

/**

protected static function name(string $expression): string

{

if (! preg_match('/\S+/', $expression, $matches)) {

throw new InvalidArgumentException('Unable to determine command name from signature.');

}

return $matches[0];

}

/**

protected static function parameters(array $tokens): array

{

$arguments = [];

$options = [];

foreach ($tokens as $token) {

if (preg_match('/^-{2,}(.*)/', $token, $matches)) {

$options[] = static::parseOption($matches[1]);

} else {

$arguments[] = static::parseArgument($token);

}

}

return [$arguments, $options];

}

/**

protected static function parseArgument(string $token): InputArgument

{

[$token, $description] = static::extractDescription($token);

switch (true) {

case Str::endsWith($token, '?*'):

return new InputArgument(trim($token, '?*'), InputArgument::IS_ARRAY, $description);

case Str::endsWith($token, '*'):

return new InputArgument(trim($token, '*'), InputArgument::IS_ARRAY | InputArgument::REQUIRED, $description);

case Str::endsWith($token, '?'):

return new InputArgument(trim($token, '?'), InputArgument::OPTIONAL, $description);

case preg_match('/(.+)\=\*(.+)/', $token, $matches):

return new InputArgument($matches[1], InputArgument::IS_ARRAY, $description, preg_split('/,\s?/', $matches[2]));

case preg_match('/(.+)\=(.+)/', $token, $matches):

return new InputArgument($matches[1], InputArgument::OPTIONAL, $description, $matches[2]);

default:

return new InputArgument($token, InputArgument::REQUIRED, $description);

}

}

/**

protected static function parseOption(string $token): InputOption

{

[$token, $description] = static::extractDescription($token);

$matches = preg_split('/\s*\|\s*/', $token, 2);

if (isset($matches[1])) {

$shortcut = $matches[0];

$token = $matches[1];

} else {

$shortcut = null;

}

switch (true) {

case Str::endsWith($token, '='):

return new InputOption(trim($token, '='), $shortcut, InputOption::VALUE_OPTIONAL, $description);

case Str::endsWith($token, '=*'):

return new InputOption(trim($token, '=*'), $shortcut, InputOption::VALUE_OPTIONAL | InputOption::VALUE_IS_ARRAY, $description);

case preg_match('/(.+)\=\*(.+)/', $token, $matches):

return new InputOption($matches[1], $shortcut, InputOption::VALUE_OPTIONAL | InputOption::VALUE_IS_ARRAY, $description, preg_split('/,\s?/', $matches[2]));

case preg_match('/(.+)\=(.+)/', $token, $matches):

return new InputOption($matches[1], $shortcut, InputOption::VALUE_OPTIONAL, $description, $matches[2]);

default:

return new InputOption($token, $shortcut, InputOption::VALUE_NONE, $description);

}

}

/**

protected static function extractDescription(string $token): array

{

$parts = preg_split('/\s+:\s+/', trim($token), 2);

return count($parts) === 2 ? $parts : [$token, ''];

}