public function testAccept()
{
$input = new ParseInput(array('a'));
$this->assertTrue($input->accept('a'));
$this->assertFalse($input->accept('a'));
$this->assertNull($input->peek());
}
/**
* @param ParseInput $input
*/
public static function parseWhitespace(ParseInput $input)
{
while ($input->accept(' ') or $input->accept("\t")) {
}
}
