[plt-scheme] dynamic require

On Jun 5, 2005, at 7:07 AM, Hans Oesterholt-Dijkema wrote:

>  For list-related administrative tasks:
>  http://list.cs.brown.edu/mailman/listinfo/plt-scheme
>
> L.S.,
>
> There seems to be a bug in the Windows variant of mzscheme:
>
> Welcome to MzScheme version 299.100, Copyright (c) 2004-2005 PLT 
> Scheme, Inc.
> > (dynamic-require 
> "devel\\mzscheme\\collects\\oodb\\backend-sqli-sqlite.scm" 'sqld-new)
> > standard-module-name-resolver: expects argument of type <module path 
> (relative string form must contain only a-z, A-Z, 0-9, -, _, ., /, and 
> space, with no leading or trailing /)>; given 
> "devel\\mzscheme\\collects\\oodb\\backend-sqli-sqlite.scm"
>
> doesn't work, where
>
> $ mzscheme
> Welcome to MzScheme version 299.100, Copyright (c) 2004-2005 PLT 
> Scheme, Inc.
> > (dynamic-require 
> "devel/mzscheme/collects/oodb/backend-sqli-sqlite.scm" 'sqld-new)
> #<procedure:sqld-new>
> > (exit)
>
> does.

 From section 5.4 of the MzScheme manual:

	• 	When a module name is a string, unix-relative-path-string, it is 
interpreted as a path relative to the source of the containing module 
(as determined by current-load-relative-directory or 
current-directory). Regardless of the platform running MzScheme, the 
path is always parsed as a Unix-format path: / is the path delimiter 
(multiple adjacent / are treated as a single delimiter), .. accesses 
the parent directory, and . accesses the current directory. To avoid 
portability problems, the path elements are further constrained to 
contain only alpha-numeric characters plus -, _, ., and space, and the 
path may not be empty or contain a leading or trailing slash.

If I understand your complaint correctly, you're expecting module-paths 
to have a platform-specific separator character, though in MzScheme 
they don't.  As I understand it, this platform-insensitivity is key in 
making it possible to write cross-platform code.

John
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