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Common Lisp: *require-hooks*
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avodono...@gmail.com  
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 More options Aug 8 2012, 6:01 pm
Newsgroups: comp.lang.lisp
From: avodono...@gmail.com
Date: Wed, 8 Aug 2012 15:01:29 -0700 (PDT)
Local: Wed, Aug 8 2012 6:01 pm
Subject: Common Lisp: *require-hooks*
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Why CL:REQUIRE is deprecated?

Would it be a good if Common Lisp provided some *REQUIRE-HOOKS*
variable - a list of functions. Every function in this list
is given a chance to load the module when user invokes (REQUIRE "module").

So if I want to integrate require with ASDF I say:
  (push (lambda (module)
          (asdf:operate 'asdf:load-op module)
          (provide module))
        cl:*require-hooks*)

If I want to integration REQUIRE with quicklisp:
  (push (lambda (module)
          (ql:quickload module)
          (provide module))
        cl:*require-hooks*)


 
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Jean-Claude Beaudoin  
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 More options Aug 8 2012, 6:31 pm
Newsgroups: comp.lang.lisp
From: Jean-Claude Beaudoin <jean.claude.beaud...@gmail.com>
Date: Wed, 08 Aug 2012 18:31:16 -0400
Local: Wed, Aug 8 2012 6:31 pm
Subject: Re: Common Lisp: *require-hooks*
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Why don't you have a look at asdf.lisp in the ASDF git repository
around line 4460 and tell us what you think! :-)

 
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avodono...@gmail.com  
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 More options Aug 8 2012, 6:48 pm
Newsgroups: comp.lang.lisp
From: avodono...@gmail.com
Date: Wed, 8 Aug 2012 15:48:16 -0700 (PDT)
Local: Wed, Aug 8 2012 6:48 pm
Subject: Re: Common Lisp: *require-hooks*
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> Why don't you have a look at asdf.lisp in the ASDF git repository
> around line 4460 and tell us what you think! :-)

Ah, most of Lisp have *module-provider-functions* for that purpose.
Good.

Could anyone explain why require is deprecated? What's wrong with it?


 
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avodono...@gmail.com  
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 More options Aug 8 2012, 6:53 pm
Newsgroups: comp.lang.lisp
From: avodono...@gmail.com
Date: Wed, 8 Aug 2012 15:53:26 -0700 (PDT)
Local: Wed, Aug 8 2012 6:53 pm
Subject: Re: Common Lisp: *require-hooks*
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I also think that maybe *module-provider-functions* deserves a CDR..

 
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Pascal J. Bourguignon  
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 More options Aug 8 2012, 7:37 pm
Newsgroups: comp.lang.lisp
From: "Pascal J. Bourguignon" <p...@informatimago.com>
Date: Thu, 09 Aug 2012 01:37:22 +0200
Local: Wed, Aug 8 2012 7:37 pm
Subject: Re: Common Lisp: *require-hooks*
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avodono...@gmail.com writes:
>> Why don't you have a look at asdf.lisp in the ASDF git repository
>> around line 4460 and tell us what you think! :-)

> Ah, most of Lisp have *module-provider-functions* for that purpose.
> Good.

> Could anyone explain why require is deprecated? What's wrong with it?

What's wrong is that when used with a single argument, it's behavior is
implementation dependant.

When you use (LOAD path), you know exactly what happens.  When you use
(REQUIRE string), anything can happen.

That's why more sophisticated facilities like ASDF or QUICKLISP are
built upon LOAD, not upon REQUIRE.

Implementation dependent features are the scourge of the CL programmer!
;-)

--
__Pascal Bourguignon__                     http://www.informatimago.com/
A bad day in () is better than a good day in {}.


 
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Ugih Li  
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 More options Aug 8 2012, 9:17 pm
Newsgroups: comp.lang.lisp
From: Ugih Li <free...@gmail.com>
Date: Wed, 8 Aug 2012 18:17:34 -0700 (PDT)
Local: Wed, Aug 8 2012 9:17 pm
Subject: Re: Common Lisp: *require-hooks*
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In ASDF if I have to specify :depends-on xxxx, I'd better use load 1.lisp load 2.lisp ...in right order in a single file instead of using asdf.

 
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Zach Beane  
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 More options Aug 8 2012, 9:46 pm
Newsgroups: comp.lang.lisp
From: Zach Beane <x...@xach.com>
Date: Wed, 08 Aug 2012 21:46:11 -0400
Local: Wed, Aug 8 2012 9:46 pm
Subject: Re: Common Lisp: *require-hooks*
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Ugih Li <free...@gmail.com> writes:
> In ASDF if I have to specify :depends-on xxxx, I'd better use load
> 1.lisp load 2.lisp ...in right order in a single file instead of using
> asdf.

You can get a similar effect by using the ":serial t" option in the
system definition.

Zach


 
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