The file msgdb.boot contains
=============================================
sayBrightlyNT1(x, $fricasOutput) ==
if x then
ATOM(x) => brightPrint0(x)
brightPrint(x)
sayBrightly1(x, str) ==
if x then
sayBrightlyNT1(x, str)
TERPRI(str)
FORCE_-OUTPUT(str)
sayMSGNT(x) == sayBrightlyNT1(x, $algebraOutputStream)
sayHtml(x) == sayBrightly1(x, $htmlOutputStream)
sayMathML(x) == sayBrightly1(x, $mathmlOutputStream)
sayTeX(x) == sayBrightly1(x, $texOutputStream)
==============================================
Is there some magic working here? The parameter $fricasOutput in
sayBrightlyNT1 is not used. Does that mean that sayTeX is actually the
same function as sayMathML?
In fact, I have another problem.
(1) -> sayBrightlyNT1("\%abc",_$texOutputStream$Lisp)$Lisp
%abc
Yes, the backslash is swallowed. In TexFormat it says:
https://github.com/fricas/fricas/blob/master/src/algebra//tex.spad#L261
-- Remark: for some reason, "\%" at the beginning
-- of a line has the "\" erased when printed
and then some workaround code follows.
But the reason seem rather clear to me: the definition
sayTeX(x) == sayBrightly1(x, $texOutputStream)
is wrong.
sayBrightly1 is implemented via brightPrint0 and this
function tries to do fancy things (no matter whether $texFormatting is
true or false).
https://github.com/fricas/fricas/blob/master/src/interp/msgdb.boot#L622
It's wrong. When I send a carefully assembled TeX string to the output
stream, I want it to stay as it is. I don't want % or \ be interpreted
in any way, since that has been done by TexFormat.
Better would perhaps be
sayTeX(x) == sayString(x)
but since I don't understand how the different output streams
$algebraOutputStream, $texOutputStream etc. get their data, that
definition doesn't seem to be fully correct.
What should we do about it? I definitely don't want to keep this remark
https://github.com/fricas/fricas/blob/master/src/algebra//tex.spad#L261
in the code, because it's a workaround for something unnecessary.
Ralf
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