ID: 8796 Updated by: andre Reported By: [EMAIL PROTECTED] Old-Status: Open Status: Analyzed Bug Type: Feature/Change Request Assigned To: Comments: there is nothing ambigous (the way you described), except if enclosed by double quotes in strings, we should maintain backwards compatibility here, but maybe we shouldn't... :) I guess (not verified) this applies to here-docs too Previous Comments: --------------------------------------------------------------------------- [2001-01-19 02:12:19] [EMAIL PROTECTED] In PHP4 it is possible to construct an object and refer to a member using the notation: $foo->bar where foo is the object and bar is the member. There has been some discussion in the php.net documentation area on OO about the inability to further extend this notation to do something like: print "$foo->bar->baz"; The reason given for not being able to do this is due to the ambiguity of the multiple -> operators. Yes, the -> operator could be ambiguous. The '+', '*', '%', ... operators could also be ambiguous. Each language which uses such binary operators disambiguates them by defining and associativity and precedence to these operators. Similarly, for languages which support similar semantics for an -> operator there is a disambiguating assignment of associativity and precedence which allows constructs like $foo->bar->baz to be unambiguously interpreted. I am requesting that the specification for PHP be broadened to include sufficient associativity and precedence constraints on -> to allow $foo->bar->baz to be disambiguated. I believe the most common disambiguation would have: $foo->bar->baz refer to "the value of the member 'baz' of the object denoted by the value of the member 'bar' of the object denoted by the value of the variable foo." Of course, I forget at the moment whether that's left- or right-associative, and the precedence should presumably be fine set at its current level. --------------------------------------------------------------------------- ATTENTION! Do NOT reply to this email! To reply, use the web interface found at http://bugs.php.net/?id=8796&edit=2 -- PHP Development Mailing List <http://www.php.net/> To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] To contact the list administrators, e-mail: [EMAIL PROTECTED]
