private function lookupTokenType(Token $token) : int
{
$type = explode('·', (string) $token)[0];
if (!defined($type)) {
$this->fail(self::E_TOKEN_TYPE, $type, $token->line());
}
return constant($type);
}
private function lookupContext(Token $token, Context $context, string $error)
{
$symbol = (string) $token;
if (null === ($result = $context->get($symbol))) {
$this->fail($error, $symbol, $token->line(), json_encode($context->symbols(), self::PRETTY_PRINT));
}
return $result;
}
private function lookupParser(Token $token) : string
{
$identifier = (string) $token;
$parser = '\\Yay\\' . explode('·', $identifier)[1];
if (!function_exists($parser)) {
$this->fail(self::E_BAD_PARSER_NAME, $identifier, $token->line());
}
return $parser;
}