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Re: How to debug function that uses macros
From: |
Joe Riel |
Subject: |
Re: How to debug function that uses macros |
Date: |
Tue, 28 Feb 2017 22:53:46 -0800 |
On Sun, 26 Feb 2017 23:36:00 -0500
Stefan Monnier <monnier@iro.umontreal.ca> wrote:
> > How do I debug, using edebug, a function that uses macros?
> > I want to step through the macro expansion.
>
> Depends where the expanded code comes from.
>
> If it comes from the macro call itself, then you'll want to add a debug
> declaration to the macro, to explain which parts of the macro's
> arguments are expressions. Something like
>
> (defmacro foo (bar baz)
> (declare (debug (symbolp form)))
> ...)
>
> If the expanded code you want to step through comes from the macro
> itself, then you can try to use edebug-` instead of the normal `, such
> as:
>
> (defmacro foo (bar baz)
> (declare (debug (symbolp form)))
> (edebug-\` (let ((,bar (something))) ,baz)))
I couldn't get that to do anything.
Do I evaluate the macro (here foo) normally,
then instrument the function that calls it?
I tried doing that, but nothing changes when stepping
through the function that includes the macro call.
>
> > The obvious way to do this is to first create the fully
> > expanded function, then use edebug on that. Maybe there
> > is a better way, but that should work. But how do I
> > create the fully expanded function? Neither macroexpand
> > nor macroexpand-all do anything useful here that I can tell.
> > For example
> >
> > (macroexpand-all '(my-function))
> >
> > just displays (my-function).
>
> Only if `my-function` is a function, in which case indeed there's
> nothing to expand.
>
>
> Stefan
>
>
--
Joe Riel
- Re: How to debug function that uses macros,
Joe Riel <=