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question to `case'
From: |
Klaus Berndl |
Subject: |
question to `case' |
Date: |
23 Mar 2005 13:39:36 +0100 |
User-agent: |
Gnus/5.09 (Gnus v5.9.0) Emacs/21.3 |
Can i use variables for the keys of the KEY-CLAUSES?
Example:
This is a case with two keys 1 and 2 which works very well:
,----
| (case (tree-node->type node)
| (1
| (nth 2 (tree-node->data node)))
| (2
| (ignore-errors (semantic-tag-class (tree-node->data node))))
| (otherwise nil))
`----
My question: I would prefer to define some constants, so e.g.
,----
| (defconst my-bucket-node-type 1)
| (defconst my-tag-node-type 2)
`----
And then i want to use these two constants as keys in this case
instead of this hard-coded numbers 1 and 2, so for example something
like:
,----
| (case (tree-node->type node)
| (my-bucket-node-type
| (nth 2 (tree-node->data node)))
| (my-tag-node-type
| (ignore-errors (semantic-tag-class (tree-node->data node))))
| (otherwise nil))
`----
whereas my-bucket-node-type and my-tag-node-type should be evaluated to
the const values...
Of course the notation above can not work but my question is: What is right
notation?
Thanks a lot in advance!
Klaus
--
Klaus Berndl mailto: klaus.berndl@sdm.de
sd&m AG http://www.sdm.de
software design & management
Carl-Wery-Str. 42, 81739 Muenchen, Germany
Tel +49 89 63812-392, Fax -220
- question to `case',
Klaus Berndl <=