Your points are well taken. I had not noticed that the K reference manual had "Return" in the controls chapter. "Amend" is not in the verb chapter for "Amend, Index, Apply & Assign" and they are all called "constructs". "Conditional" is in a separate chapter for Conditionals "Monadic case" (with Each) is in the chapter for Adverbs. "Resume" and "Return" are both in the chapter for Controls and Debugging.
My background is in APL. In A+ "Result" is considered a "nonscalar monadic primitive function" (a.k.a. verb). See http://www.aplusdev.org/refman.html and then click on Nonscalar functions. I've been viewing this from an APL, A+ perspective, which is probably not appropriate. As far as "Return" being described as "exception handling", it's sort of a moot point in my case, as I need to implement "Return" for Kona in C which does not have any built-in exception handling facitlies for me to use anyway. Tom On Thu, Oct 18, 2012 at 4:29 PM, Boyko Bantchev <[email protected]> wrote: > On 18 October 2012 21:30, Tom Szczesny <[email protected]> wrote: >> ................ >> 1) Amend >> 2) Conditional >> 3) Monadic case (with each) >> 4) Resume >> 5) Return >> So, in K, the control structure is implemented as a special case of a verb. > > Actually, none of the above is anything like a verb. > Specifically, the one under discussion, 'return', is described in the > 'Controls' chapter. So K's return is a control, just as it is in J. > >> ... probably even better described as exception handling > > Hardly so. First, raising an exception does not return control to > a caller; rather, it seeks for a handler (catcher). Second, in doing > so, as many functions as necessary can be exited at once. For raising > exceptions, similar to other languages, J has the 'throw.' control. > > The closest to J's (or K's) return from other languages is ... return. > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
