/**
* Throw a syntax error
*
* @param string $expected
* @throws ParserException
*/
private function syntaxError($expected)
{
$token = $this->lexer->lookahead;
$tokenPosition = isset($token['position']) ? $token['position'] : '-1';
$message = sprintf('line 0, col %s: Error: Expected %s, got ', $tokenPosition, $expected);
if ($this->lexer->lookahead === null) {
$message .= 'end of string';
} else {
$message .= $this->lexer->getLiteral($token['type']);
}
throw new ParserException($message);
}
/**
* Assert an expected token
*
* @param mixed $expected
* @param mixed $actual
*/
private function assertToken($expected, $actual)
{
$this->assertEquals($expected, $actual, sprintf('Expected %s, got %s', $this->lexer->getLiteral($expected), $this->lexer->getLiteral($actual)));
}