Hi @fabpot, with PHPStan improving every day his exception checking, it's useful to have well documented method.

I didn't update all of them (there are too many), and focus on the one I have issue with:

• Almost all the InfixExpressionParserInterface/PrefixExpressionParserInterface implements throws a SyntaxError in parse method
• Parser::parse method is catching SyntaxError and rethrowing them so it should be added to the phpdoc
• Since Parser::parse catch Parser::subparse, it would be useful to add the phpdoc to subparse