In the meantime I updated Rick's sandbox 64-bit-Windows ooRexx debug versions for the "variable references" and "address with" (added three simple Rexx examples there as well).
The URL remained the same (see at the bottom). ---rony On 11.07.2018 13:27, Rony G. Flatscher wrote: > On 09.07.2018 23:24, Rick McGuire wrote: >> Jon, >> >> A variable reference is something that works the way people keep thinking >> use arg works. There are >> basically three pieces to this: >> >> 1. A variable reference class that can hold a reference to a variable. Using >> a variable reference >> instance, a variable value can be retrieved or set. >> 2. A new operator (well, two actually) that creates an instance of a >> variable reference object >> from the current execution context. >> 3. An extension to USE ARG that allows an argument to be specified as a >> required variable >> reference. This type of argument creates a variable alias in the caller. >> >> Most of this is invisible to the caller, but, for example, suppose you want >> to have a call where >> you have an error code that is returned and you also wish to pass other >> information back if the >> call was successful. There are many awkward solutions that people have used >> for this, but with the >> variable references you can do this. >> >> if myFunc(>info) == 0 then >> >> The > prefix operator creates a reference to the variable info that is >> passed to the caller. On >> the call target side, you would have >> >> use arg >returnInfo >> >> ... >> returnInfo = result >> return 0 >> >> Assigning something to returnInfo actually assigns the value to the variable >> info back in the >> caller. Because the thing that gets passed around is an object instance, >> this call-by-reference >> type will also work from native code. >> >> This is not in trunk yet, only in the sandbox branch sandbox\rick\reference >> >> You would need to build this yourself or I believe Rony had a build in his >> dropbox someplace. > Yes, they still are there (I have a subdirectory with Rick's two sandbox > versions, one "address > with" and one "reference", here is the URL: > <https://www.dropbox.com/sh/olh1mqfwb4brp7r/AABI1X-Le9zDCJ0gyfvMdKB8a?dl=0>. > > Please note that there are a few little Rexx programs that experiment, "play" > with the feature. > > Also, please note the dates of the productions (64-bit Windows versions > only), i.e. the version that > includes the variable reference feature was built on May 7th. Will try to > find a time slot to update > the reference sandbox version as I saw that new commits have been applied to > it in the past days. > > ---rony > > > > > ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Oorexx-devel mailing list Oorexx-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/oorexx-devel
