patch for ASDF documentation regarding dependencies and versions

Robert Goldman pointed out that the current ASDF manual doesn't  
correctly describe how to include version dependency in an ASDF system  
definition. In particular, the grammar specifies that the  depends-on  
option should take a list of simple-component-names (which aren't,  
BTW, defined). This provides no means to specify versions at all and  
guessing at something like

   :depends-on ((:system "foo" :version "1.2.0"))

looks reasonable but won't work. Robert did the spelunking to figure  
out that the correct syntax is:

   :depends-on ((:version "foo" "1.2.0"))

The patch below attempts to rectify the documentation. I'll commit  
this unless there is much gnashing of teeth.

Index: asdf.texinfo
===================================================================
RCS file: /cvsroot/cclan/asdf/asdf.texinfo,v
retrieving revision 1.8
diff -u -w -u -r1.8 asdf.texinfo
--- asdf.texinfo	2 Jun 2007 02:44:59 -0000	1.8
+++ asdf.texinfo	5 Feb 2008 14:07:56 -0000
@@ -337,7 +337,7 @@
          | :explain method-form
  	| :output-files  method-form
          | :operation-done-p method-form
-        | :depends-on ( {simple-component-name}* )
+        | :depends-on ( {dependency-def}* )
  	| :serial [ t | nil ]
          | :in-order-to ( {dependency}+ )

@@ -348,11 +348,18 @@

  component-type := :module | :file | :system | other-component-type

+dependency-def := simple-component-name
+               | ( :feature name )
+               | ( :version simple-component-name version-specifier)
+
  dependency := (dependent-op {requirement}+)
  requirement := (required-op {required-component}+)
               | (feature feature-name)
  dependent-op := operation-name
  required-op := operation-name | feature
+
+simple-component-name := string
+                      |  symbol
  @end verbatim

  @subsection Serial dependencies

--
Gary Warren King, metabang.com
Cell: (413) 559 8738
Fax: (206) 338-4052
gwkkwg on Skype * garethsan on AIM





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