[Texmacs-dev] Problem with the scheme_tree format.

[David Allouche]

The scheme_tree, to which is converted any parameter declared of type
"tree" in the build-glue-*.scm files, is broken.

The problem is that it is too poorly structured. The only tree_label
used are TUPLE and STRING. Symbols are represented by unquoted strings
and strings are represented by quoted strings.

That is confusing and led to at least one problem with the
get-inverse-binding command. To get the binding associated to a symbol,
say "<leftarrow>" the string (which is a so-called "universal symbol"
but is actually a string for all practical purpose) the GUILE program
must first convert it to a Scheme symbol...

Furthermore, the scheme_tree format cannot represent Scheme characters
or booleans. The only literals it can represent are numbers, symbols
and strings. That is very annoying since chars and booleans, which are
types which do provide interesting (because safe) semantics cannot be
used in server commands.


-- 

                             -- David --