/**
* @return Token
* @throws ParseException
*/
protected function readNext()
{
$this->readWhile([$this, 'isWhitespace']);
if ($this->input->eof()) {
return null;
}
$char = $this->input->peek();
if ($this->isComment()) {
$this->skipComment();
return $this->readNext();
}
if ($char == '"') {
return $this->readDoubleQuotedString();
}
if ($char == '\'') {
return $this->readSingleQuotedString();
}
if ($this->isDoubleBracketString()) {
return $this->readDoubleBracketString();
}
if ($this->isDigit($char)) {
return $this->readNumber();
}
if ($this->isStartIdentifierCharacter($char)) {
return $this->readIdentifier();
}
if ($this->isPunctuation($char)) {
return $this->readPunctuation();
}
$this->input->error('Cannot handle character: ' . $char . ' (ord: ' . ord($char) . ')');
}
