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Further details about changes between 1.0.2.6 and 1.0.2.7

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Joris van der Hoeven 2003-11-05 12:25:52 +00:00
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about/changes/changes-7.en.ptm
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<expand|section|Macro expansion (1.0.2.3 -- 1.0.2.4)> <expand|section|Macro expansion (1.0.2.3 -- 1.0.2.7)>
An important internal change concerning the data format has been made: An important internal change concerning the data format has been made:
macro expansions like macro expansions and function applications like
<\expand|scheme-fragment> <\scheme-fragment>
(expand <em|tag> <em|arg-1> ... <em|arg-n>) (expand <em|tag> <em|arg-1> ... <em|arg-n>)
</expand> </scheme-fragment>
<\scheme-fragment>
(apply <em|tag> <em|arg-1> ... <em|arg-n>)
</scheme-fragment>
are now replaced by hard-coded tags are now replaced by hard-coded tags
<\expand|scheme-fragment> <\scheme-fragment>
(<em|tag> <em|arg-1> ... <em|arg-n>) (<em|tag> <em|arg-1> ... <em|arg-n>)
</expand> </scheme-fragment>
This makes the internal representation match with the corresponding Moreover, functions have systematically been replaced by macros. The few
<name|Scheme> representation. However, many perverse errors might arise in built-in functions which may take an arbitrary number of arguments have
the few upcoming versions. Please keep copies of your old files and report been rewritten using the new <markup|xmacro> construct. If you ever wrote
any suspicious behaviour to us. such a function yourself, then you will need to rewrite it too.
The new approach favorites a uniform treatment of macros and functions and
makes the internal representation match with the corresponding
<name|Scheme> representation. More and more information about tags will
gradually be stored in the <abbr|D.R.D.> (Data Relation Definition). This
information is mostly determined automatically using heuristics.
Notice that some perverse errors might arise because of the above changes.
Please keep copies of your old files and report any suspicious behaviour to
us.