Mismatch between Expr and concatenation about expression

[webmozart]

empty is a reserved word, hence the is prefix. Do you still think your suggestion should be applied?

[xabbuh]

@webmozart But you can still use reserved words as method names, can't you? So why not have an empty() method in the Expr class? Never mind, you cannot.

[webmozart]

@xabbuh That's true for constants (e.g. true, false, null), but unfortunately not for language constructs (empty, instanceof, ...). Otherwise I would have done that already. :(

[xabbuh]

@webmozart Yeah, I should have actually checked that before commenting and were too fast to answer. ;)