/**
* Parse the given input
*
* @param Input $input
*
* @return mixed result
*/
public function parse(Input $input)
{
if ($input->peek(0) === $this->char) {
$input->consume(1);
return $input->matchHere($this->char);
}
return $input->errorHere("{$this->char} was not found.")->addParser($this);
}
public function testPeek()
{
$input = new Input('1234');
$this->assertEquals('1', $input->peek(0));
$this->assertEquals('2', $input->peek(1));
$this->assertEquals('3', $input->peek(2));
$this->assertEquals('4', $input->peek(3));
$this->assertEquals(0, $input->getOffset());
}
