On 5/17/2017 8:35 AM, Otared Kavian wrote:
Hi Hans,
Thanks for having fixed the behavior of the prime in the latest beta release
(ConTeXt version 2017.05.15 21:48).
However, as you may see in the two attached PDF files, the result is still
incorrect when one types for example $f_2ââ(x)$, which should give the same
result as $fââ_2(x)$.
The correct behaviour is that obtained with mkii. Indeed one can circumvent the
behaviour of the latest beta release of mkiv by using tricks such as the ones
in the example code below, but this should be avoided in my opinion.
well, it depends on how one sees this '' mess
the problem with primes is that in macro packages they are messy
entities that should collapse or not (active char mess) and the more
clever a macro packages becomes the harder it becomes to makes it robust
and/or to fight against such heuristics
add to that the fact that the symbol itself is a funny positioned
something already raised in a font or not i.e. sometimes in need of
superscript and sometimes explicitly not
for unicode we need to turn two '' into a double and ''' into a and
triple such
that said, in context these thingies are at some point intercepted and
their current state is looked at: superscript? multipel in a row? one
ebing the nucleus of another ... etc .. the current (working again)
behavior is what we support and i don't look forward to more heuristics
The following PDF have been obtained with mkii and mkiv with the following
example code.
Best regards: OK
%%% begin derivatives-prime.tex
\starttext
\startformula
f''_{2}(x) = f_{2}''(x) = f^{''}_{2}(x) = f_{2}^{''}(x) % = f^{{}^{''}}_{2}(x)
\stopformula
As one may see the result of \type{f_{2}''(x) = } $f_{2}''(x)$ is not correct
in \type{mkiv}.
The following positions of the superscripts \type{(3)} are correct both in
\type{mkii} and in \type{mkiv}.
\startformula
f^{(3)}_{2}(x) = f_{2}^{(3)}(x)
\stopformula
\stoptext
%%% end derivatives-prime.tex
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