About `cl-load-time-value'

About `cl-load-time-value'

[Xue Fuqiao]

In the trunk version of (info "(cl) Time of Evaluation"):

     In a compiled file, `cl-load-time-value' arranges for FORM to be
     evaluated when the `.elc' file is loaded and then used as if it
     were a quoted constant.  In code compiled by `byte-compile' rather
     than `byte-compile-file', the effect is identical to
     `eval-when-compile'.

Why is the code compiled by `byte-compile' and `byte-compile-file'
being treated different?  Can anybody help?  Thanks.

-- 
Best regards, Xue Fuqiao.
http://www.emacswiki.org/emacs/XueFuqiao

Re: About `cl-load-time-value'

[Barry Margolin]

In article <mailman.18842.1359801098.855.help-gnu-emacs@gnu.org>,
 Xue Fuqiao <xfq.free@gmail.com> wrote:

> In the trunk version of (info "(cl) Time of Evaluation"):
> 
>      In a compiled file, `cl-load-time-value' arranges for FORM to be
>      evaluated when the `.elc' file is loaded and then used as if it
>      were a quoted constant.  In code compiled by `byte-compile' rather
>      than `byte-compile-file', the effect is identical to
>      `eval-when-compile'.
> 
> Why is the code compiled by `byte-compile' and `byte-compile-file'
> being treated different?  Can anybody help?  Thanks.

Because when you use byte-compile, you're not creating a file, and "when 
the .elc file is loaded" doesn't exist.  So it evaluates it immediately 
and puts the value in the compiled function.

-- 
Barry Margolin, barmar@alum.mit.edu
Arlington, MA
*** PLEASE post questions in newsgroups, not directly to me ***

Re: About `cl-load-time-value'

[Stefan Monnier]

> Why is the code compiled by `byte-compile' and `byte-compile-file'
> being treated different?  Can anybody help?  Thanks.

The best help I can give is to stay away from it, because if you look at
the implementation, you'll see it's so hackish that you won't want to
depend on it,


        Stefan