On Wed, Feb 23, 2011 at 9:04 PM, Brian Schott <[email protected]> wrote:
> Update:
>
> I suspect my problem is that my verbs are recursive
> such as `foo=: 10&$: : *` and trace has not dealt with this.
You can make recursive verbs traceable by building trace into the
verbs.
For example, here is recursive factorial:
(*$:@:<:)^:(1&<)
And, if you fix trace, here is a traced version
factorial=: 3 :'trace ''(*factorial_base_@:<:)^:(1&<)'',linrep y'
Here is the fix needed:
require'trace'
linrep_z_=: 3 :0
5!:5<'y'
)
trace_jtrace_=:3 : 0
_ trace y
:
tracer=. conew 'jtrace'
r=.". >(<1 1){parse__tracer 'trace';x;y
coerase tracer
r
)
Note that a recursive function cannot, in general, know what locale it
is being called from, and trace does not make any provisions for
specifying a local to use for names, so the recursive factorial needs
to explicitly reference its home locale.
--
Raul
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