There's an edge case in "datum comments of sweet-expressions" I'd like to note. If anyone has comments, please post!
Here's the edge case: If there is a single datum on a line, followed by children that produce an empty value (now possible with datum comments), what should that mean? Does it even matter? For example, given this input: foo5-body-only-comments ! #; hello My current starting implementation produces this: (foo5-body-only-comments) ... and *NOT* the symbol "foo5-body-only-comments". That's because the "monify" routine is *only* invoked if there is *NO* body at all. At first I thought, "ah, a bug. That should return the symbol foo5-body-only-comments". After all, normally comments don't change interpretation of text. But... maybe this is better. If you comment out all the children by prepending "#;", it's likely it was originally a call to a procedure with some parameters that are being commented out. In which case, making it return a list is the "least surprising" result. The current semantics given here do fall out quite straightforwardly from the grammar. It's certainly *possible* to make it return the single datum if the body is empty... but SHOULD it? Or, is this an edge case where no one cares? My goal is to make the semantics "obvious".. the trick is sometimes figuring out what that means :-). If no one speaks up, I'll probably just keep these semantics, but if there's a good argument either way I'd like to know. --- David A. Wheeler ------------------------------------------------------------------------------ See everything from the browser to the database with AppDynamics Get end-to-end visibility with application monitoring from AppDynamics Isolate bottlenecks and diagnose root cause in seconds. Start your free trial of AppDynamics Pro today! http://pubads.g.doubleclick.net/gampad/clk?id=48808831&iu=/4140/ostg.clktrk _______________________________________________ Readable-discuss mailing list Readable-discuss@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/readable-discuss
