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[Texmacs-dev] Environment at a tree

From: Lionel Elie Mamane
Subject: [Texmacs-dev] Environment at a tree
Date: Mon, 20 Nov 2006 15:49:08 +0100
User-agent: Mutt/1.5.13 (2006-08-11)


Given t a value of type tree in TeXmacs's scheme environment, is there
an easy way to find the value what a certain TeXmacs variable has at
that point in the document? Roughly, what the tree (value "foo") would
be if placed at the place of t. I mean, suppose that the tree-type
value points at the tree (here) in the following document:

 (with "foo" "bar"
     (with "foo" "baz"
            (input "$" "Go! Go!")
            (input (concat "$" (here) "%") "Back! Back!")
            (output "No luck here."))))))

I would get "baz". An "easy" way means short of doing tree-up until
one encounters a (with "foo" . .) or (with . . "foo" . .) or
 (with . . . . "foo" . .)
where "." stands for any tree. An easy way includes a library routine
that would do just that.


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