/**
* @param string $config
* @return TokenIterator tokens
* @throws ConfigException
*/
public function lex($config)
{
$normalized = Strings::normalize($config);
// remove meaningless leading spacing to simplify T_KEYWORD
$simplified = Strings::replace($normalized, '~^\\s+~m', '');
try {
$tokens = $this->getTokenizer()->tokenize($simplified);
return new TokenIterator($tokens);
} catch (TokenizerException $e) {
throw ConfigException::createFromLexerException($e);
}
}
/**
* @param string|array $expected
* @param string $type
* @throws ConfigException
*/
private function assertState($expected, $type)
{
if (!is_array($expected)) {
$expected = [$expected];
}
if (!in_array($type, $expected, TRUE)) {
$expectedFmt = implode(', ', $expected);
throw ConfigException::createFromParser("Expected state {$expectedFmt} but is {$type}");
}
}
