public function parsePrimary()
{
//unary
if ($this->inUnaryOperator($this->tokenStream->lookNext())) {
return $this->parseUnary();
}
//bracket
if ($this->tokenStream->test(Token::TYPE_PUNCTUATION, '(')) {
return $this->parseBracket();
}
//array
if ($this->tokenStream->test(Token::TYPE_PUNCTUATION, '[') || $this->tokenStream->test(Token::TYPE_PUNCTUATION, '{')) {
return $this->parseArray();
}
if ($this->tokenStream->test(Token::TYPE_NAME)) {
//constant val eg: null
if (in_array(strtolower($this->tokenStream->lookNext()->getValue()), ['null', 'true', 'false'])) {
return new ConstantNode($this->tokenStream->next());
} else {
//function eg: test()
return $this->parseFunction();
}
}
//attribute eg: $x | $x.varName | $x.func(1,2) | $x["y"]
if ($this->tokenStream->test(Token::TYPE_VARIABLE)) {
return $this->parseAttributeOrMethod();
}
$token = $this->tokenStream->next();
switch ($token->getType()) {
case Token::TYPE_NUMBER:
case Token::TYPE_STRING:
return new ConstantNode($token);
default:
throw new ParseException($this->tokenStream->getFileName(), 'unexpected ' . $token->getValue(), $token->line, $token->col);
}
}
/**
* @param $tokenStream TokenStream
* @return AbstractNode
*/
public function parse(TokenStream $tokenStream)
{
$this->tokenStream = $tokenStream;
$bodyNode = $this->parseBody(null);
return new RootNode($tokenStream->getFileName(), $bodyNode->childNodes);
}
