When You Get to Be Smart Writing a Macro
a year ago
- #Macros
- #Debugging
- #Clojure
- Day-to-day programming is often straightforward, but finding smart solutions is rare.
- The author uses 'hashp' for debugging, which is a better alternative to 'println'.
- The 'hashp' macro returns the original value, is concise, and shows the original form.
- Adding 'hashp' to a thread-first macro causes syntax errors due to reader tag expansion.
- A custom macro 'p->' is created to work within threading macros, but it requires separate macros for different threading styles.
- A smarter solution is devised using a probe to detect threading context (-> or ->>) dynamically.
- The new solution works seamlessly in all contexts: normal, thread-first, and thread-last.
- The enhanced 'hashp' is now part of Clojure+.