Re: How to debug indentation

[Michael Heerdegen <michael_heerdegen@web.de>]

"N. Raghavendra" <nyraghu27132@gmail.com> writes:

> I can see what `trace-function' does, but can't make out how to use
> `trace-values'.  I saw trace.el, but there is no documentation there
> about it.

It has a docstring.

>  Can you give some idea of how to use it?

AFAICT you just place into in the code, reevaluate, and it will print
values into the trace buffer.  E.g.

(defun fac (x)
  (trace-values (cons 'x x))
  (if (< x 2) 1 (* x (fac (1- x)))))

Tracing `fac' and evaluating (fac 3) gives you a trace buffer like

1 -> (fac 3)
1 -> (trace-values (x . 3))
  2 -> (fac 2) 
  2 -> (trace-values (x . 2))
    3 -> (fac 1)
    3 -> (trace-values (x . 1))
    3 <- fac: 1
  2 <- fac: 2
1 <- fac: 6

Nothing more.


Michael.