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[Gcl-devel] Error when compiling function with doc string, declaration

From: Jared Davis
Subject: [Gcl-devel] Error when compiling function with doc string, declaration
Date: Wed, 15 Mar 2006 12:03:31 -0600
User-agent: Mozilla Thunderbird 1.0.7 (X11/20051013)

Hi Camm,

I am running GCL 2.6.7 CLtL1, installed via apt-get on ubuntu.  If I write:

  (defun foo (x)
             (declare (type integer x))

Then this is accepted, and everything seems fine. For example, I can write (documentation 'foo 'function) and "baz" is returned; similarly I can run (foo 3) and obtain 3 as expected. But if I try to compile foo, I get an error message:

Compiling gazonk6.lsp.
; (DEFUN FOO ...) is being compiled.
;;; The declaration (DECLARE (TYPE INTEGER X)) was found in a bad place.
No FASL generated.

Error: Cannot open the file NIL..
Fast links are on: do (si::use-fast-links nil) for debugging
Error signalled by LET.
Broken at LOAD.  Type :H for Help.

If I switch the order of the declaration and the documentation string, the problem goes away.

Maybe this is a bug. But, looking at the grammar for "defun" on the Common Lisp Hyperspec, it seems like providing both documentation and declarations is actually not allowed. How bizarre! Could this really be intentional?

For what it's worth, this error does not seem to occur on GCL 2.6.6, but does occur on 2.7.0 ANSI.



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