Using what I have learned in the last few days about ‘parse’ in Red, I have improved the Logo interpreter from the last post, so that it now supports procedures.
I have made a little “port” of a logo interpreter I wrote in Rebol some time ago. Back then I did it to try and understand how parsing works in Rebol. Now I just wanted to have some fun with Red, since it has a GUI as of the 0.6 release.
So I have been busy with the ABAP Lisp interpreter. The main focus now is the integration to ABAP. When I first started out with it, I had a vague idea in my head of what I wanted the interpreter to be able to do.
I published a blog post today titled “A Lisp Interpreter in ABAP” on SCN. I just finished developing a basic Lisp interpreter in ABAP which is inspired by Peter Norvig’s “(How to Write a (Lisp) Interpreter (in Python))” and Anthony Hay’s “Lisp interpreter in 90 lines of C++“.
I have just published a new version of the nwrfc gem with (as usual) very minor updates.
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One of the problems ABAP developers face from time to time is the need to store arbitrary values for processing. These values do not always justify creating a new table, and there is no convenient place to store such values.
We have had the capability to process JSON in ABAP for some time now (refer to this blog post for an introduction). The problem is that it does not satisfy all the use cases without some effort and, therefore, there is still some scope for writing a custom JSON parser in ABAP. I recently wrote one again.
While learning about the power of dialects in Rebol, I decided to write a little Logo interpreter to put what I learned to use.