Hi, code is very tricky. From looking through the mercurial repository on src/redisplay.c I can see a lot of comments that support this. I am interested in trying to add a regression suite of sorts to the redisplay code. I took a quick look around the repository and I did not see anything like this - but maybe I missed it. I have in mind something like this: Create some hooks into redisplay.c that make some critical data structures (like struct display_line) have a simple Lisp accessible representation. Imagine serializing a struct into a simple string or Lisp list. Then I could create test cases that created a particular redisplay situation and then checked to see if the data structs ended up with the right values. It would be nice if this kind of testing could be done from inside a running xemacs process. The goal of this kind of regression suite would be to create enough tests that can be used as a way of validating any future changes to the redisplay code. My question: Is there any C code in xemacs that creates simple Lisp structures and returns them to Lisp? Basically I want to create a function that would turn a struct display_line into a Lisp list - is there some code that I could look at to get an idea on how to do this? Thanks for any comments. -Ram _______________________________________________ XEmacs-Beta mailing list XEmacs-Beta(a)xemacs.org http://calypso.tux.org/cgi-bin/mailman/listinfo/xemacs-beta