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Re: Lisp watchpoints

From: Andreas Schwab
Subject: Re: Lisp watchpoints
Date: Sun, 29 Nov 2015 12:28:11 +0100
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.5 (gnu/linux)

Stefan Monnier <address@hidden> writes:

>> +      else if (FUNCTIONP (watcher))
>> +        CALLN (Ffuncall, watcher, operation, where, symbol, newval);
> I don't think you need to test "FUNCTIONP (watcher)".
> And you don't need Ffuncall: what you wrote is similar to writing
>    (funcall #'funcall watcher operation where symbol newval)

The first argument to CALLN is a C function implementing a Lisp
function, like Ffuncall, but watcher isn't.  So the Ffuncall is needed
and it's equivalent to (funcall watcher operation where symbol newval).


Andreas Schwab, address@hidden
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