|From: Bill <[EMAIL PROTECTED]>
|Date: Sun, 15 Jun 2008 02:00:53 -0400
|
|I'm using CMU CL 19d and I'm trying to use Jonathan Amsterdam's Iterate
|macro package, v. 1.4.3. Installation went fine, asdf and all that. My
|problem is that I can't find a way to use (in the package sense) it.
|When I try use-package I get collisions with the symbols ITERATE and
|COLLECT. I don't care about colliding with the loop macro but I use the
|CMU CL extension iterate. The macro package provides iter as a synonym
|for iterate for precisely this reason.
|
|Is there any way I can arrange to 1) use the symbols exported from the
|iterate package without qualification and at the same time 2) use
|ext:iterate.
CL allows you to shadow symbols when to work around problems of
collision in packages. In this case you want to do a
CL:SHADOWING-IMPORT of the symbol from iterates' package. Then
EXT:ITERATE is available.
[I don't use condone the iterate macro, but the following example
should indicate how it works. Look up SHADOW and SHADOWING-IMPORT in
the spec. Note DEFPACKAGE also allows you to specify how symbols can
be shadowed.]
* (describe 'iterate)
ITERATE is an external symbol in the EXTENSIONS package.
Macro-function: #<Byte function (:MACRO ITERATE) {280C0EF1}>
Macro documentation:
Iterate Name ({(Var Initial-Value)}*) Declaration* Form*
This is syntactic sugar for Labels. It creates a local function Name with
the specified Vars as its arguments and the Declarations and Forms as its
body. This function is then called with the Initial-Values, and the result
of the call is return from the macro.
On Wednesday, 4/2/08 10:51:38 am MDT it was compiled from:
target:code/extensions.lisp
Created: Sunday, 10/5/03 05:41:22 am MDT
Comment: $Header: /project/cmucl/cvsroot/src/code/extensions.lisp,v 1.28
2003/10/05 11:41:22 gerd Exp $
* (defpackage "FOO" (:export "ITERATE"))
#<The FOO package, 0/8 internal, 1/2 external>
* (shadowing-import '(foo:iterate))
T
* (describe 'iterate)
ITERATE is an external symbol in the FOO package.
--
Madhu
