> On Feb 15, 2017, at 7:36 AM, Christopher Allan Webber
> <cweb...@dustycloud.org> wrote:
>
> One thing that we see requested a lot is how to do the equivalent of:
>
> import pdb
> pdb.set_trace()
>
> in python, just dumping something to "trigger" the debugger somewhere.
> I seem to remember getting some arcane code to do something similar, but
> maybe we can just have a simple invocation that people could put
> anywhere. (Amirouche has been raising this one also I think.)
>
I am playing with this. It does dump me into the debugger but the interaction
is not wonderful (like pdb.set_trace()).
However, this is context for working in that direction (i.e., pdb.set_trace()):
mwette$ cat trapper.scm
(use-modules (system repl repl))
(use-modules (system repl debug))
(define-syntax-rule (trap-here)
(start-repl
#:debug (make-debug (stack->vector (make-stack #t)) 0 "trap!" #t)))
(define (foo)
(let iter ((sum 0) (vals '(1 2 3 5 8 2)))
(trap-here)
(if (null? vals) sum
(iter (+ sum (car vals)) (cdr vals)))))
(foo)
mwette$ guile
GNU Guile 2.0.13
[…]
scheme@(guile-user)> (load "trapper.scm")
[…]
scheme@(guile-user) [1]> ,bt
[…]
In /Users/mwette/proj/scheme/myproj/potluck/trapper.scm:
10:4 1 (foo)
In unknown file:
0 (make-stack #t)
scheme@(guile-user) [1]>
