Common Lisp doesn't support macros so every Lisp programmer can create their own variants of standard control constructs any more than C supports functions so every C programmer can write trivial variants of the functions in the C standard library.
This chapter introduces us again to macros (and from the looks of it there will be more introductions in future chapters). It had a nice story that tried to show how one might want macros and then walked you through making the macro 'do-primes'. The more interesting part of the chapter was the sections on the leaks. It mentions that there are three types of leaks, but never explicitly lists them. Here is what I think they are:
- multiple-evaluation leak
- out of order leak
- not using unique names leak
It was interesting to learn about the solutions presented and I am curious if there is any way to apply that knowledge to my c/c++ programming.
I went back in the book to chapter 2 and looked up how to reindent an entire function (C-c M-q) which came in handy as we kept adding and removing things from the macro.