There’s also dotrace, which allows you to look at the inputs and outputs of selected functions.
(use 'clojure.contrib.trace)
(defn fib[n] (if (< n 2) n (+ (fib (- n 1)) (fib (- n 2)))))
(dotrace [fib] (fib 3))
produces the output:
TRACE t4425: (fib 3)
TRACE t4426: | (fib 2)
TRACE t4427: | | (fib 1)
TRACE t4427: | | => 1
TRACE t4428: | | (fib 0)
TRACE t4428: | | => 0
TRACE t4426: | => 1
TRACE t4429: | (fib 1)
TRACE t4429: | => 1
TRACE t4425: => 2
2
In Clojure 1.4, dotrace
has moved:
You need the dependency:
[org.clojure/tools.trace "0.7.9"]
(require 'clojure.tools.trace)
And you need to add the ^:dynamic to the function definition
(defn ^:dynamic fib[n] (if (< n 2) n (+ (fib (- n 1)) (fib (- n 2)))))
Then Bob is once again your uncle:
(clojure.tools.trace/dotrace [fib] (fib 3))
TRACE t4328: (fib 3)
TRACE t4329: | (fib 2)
TRACE t4330: | | (fib 1)
TRACE t4330: | | => 1
TRACE t4331: | | (fib 0)
TRACE t4331: | | => 0
TRACE t4329: | => 1
TRACE t4332: | (fib 1)
TRACE t4332: | => 1
TRACE t4328: => 2