[plt-scheme] SchemeQL and list.ss not on speaking terms?

From: Jay McCarthy (jay.mccarthy at gmail.com)
Date: Wed Apr 13 16:23:37 EDT 2005


(prefix schemeql: (lib "schemeql.ss" "schemeql"))


(prefix list: (lib "list.ss"))

This will prefix every symbol exported from the collection with
"list:". If you search on "module" and "require" in the Help Desk, you
will find other symbol modifications, such as renaming of single

I generally find it useful to prefix the libraries I only use
occasionally, while leaving the other libraries without prefixes. So
in this case, you may want to prefix list.ss.

Jay McCarthy

On 4/13/05, nishad at ptolemy.tlg.uci.edu <nishad at ptolemy.tlg.uci.edu> wrote:
>   For list-related administrative tasks:
>   http://list.cs.brown.edu/mailman/listinfo/plt-scheme
> In mzscheme v209, when I say
> (require
>  (lib "schemeql.ss" "schemeql")
>  (lib "pregexp.ss" "mzlib")
>  (lib "string.ss" "srfi" "13")
>  (lib "list.ss" "srfi" "1"))
> it replies with
> repl-1:1:0: require: duplicate import identifier at: delete in: (require (lib "schemeql.ss" "schemeql") (lib "pregexp.ss" "mzlib") (lib "string.ss" "srfi" "13") ...
> Looking around in the SchemeQL collection, I find this at the top of
> connection.ss:
> (module connection mzscheme
>         ;; if, and when, the need to use a different driver with
>         ;; SchemeQL arises.  this require will have to be
>         ;; modify to require the appropriate interface for such a driver.
>         (require "odbc.ss"
>                  "exception.ss"
>                  (lib "list.ss") ;; remove
>                  )
> Notice the "remove" comment for list.ss.  Is this causing the
> "duplicate import identifier" message?  Should I simply follow the
> author's advice and nuke that line?  Will I need to recompile SchemeQL
> if I do so?
> I need to use both collections, schemeql and list, in the same
> program.  But I'm not too savvy about how PLT modules and "require"
> work, so help from guys would surely be better than whatever cargo
> cult stuff I'd try on my own.  Help! :-)
> nishad
> --
> "Things ain't been the same since the blues walked into town."
>                                                 -- Larry Love

Jay McCarthy <jay.mccarthy at gmail.com>

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