}
$char = substr($this->in, $this->pos, 1);
$this->pos++;
return $char;
}
public function getPos()
{
return $this->pos;
}
public function pushBackChar()
{
$this->pos--;
}
public function string()
{
return $this->in;
}
}
/**
* Demo
*/
$context = new Context();
$user_in = "\$input equals '4' or \$input equals 'four'";
$reader = new StringReader($user_in);
$scanner = new Scanner($reader, $context);
while ($scanner->nextToken() != Scanner::EOF) {
// var_dump($scanner->token(), $scanner->char_no(), $scanner->getTypeString());
print $scanner->token();
print "\t{$scanner->char_no()}";
print "\t{$scanner->getTypeString()}\n";
}
