Conflict between blackboard bold font and enumerations

Conflict between blackboard bold font and enumerations

[Ogam Géry]

Hi,

I've got a problem with "\blackboard". When I use it in the title of an 
enumeration (title=yes in setupenumerations), I get this error during 
compilation:
! Incomplete \iffalse; all text was ignored after line x. <inserted 
text> \fi

For instance:
\starttext
\defineenumeration[hello]
\setupenumerations[hello][title=yes]
\starthello{$\blackboard{ABCD}$}
\stophello
\stoptext

Yet if I replace "\blackboard{ABCD}" with \reals (or \naturalnumbers, or 
\integers etc.), it works fine. What's wrong?

Thanks.

Géry
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Re: Conflict between blackboard bold font and enumerations

[Aditya Mahajan]

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On Thu, 31 Dec 2009, Ogam Géry wrote:

> Hi,
>
> I've got a problem with "\blackboard". When I use it in the title of an 
> enumeration (title=yes in setupenumerations), I get this error during 
> compilation:
> ! Incomplete \iffalse; all text was ignored after line x. <inserted text> \fi
>
> For instance:
> \starttext
> \defineenumeration[hello]
> \setupenumerations[hello][title=yes]
> \starthello{$\blackboard{ABCD}$}
> \stophello
> \stoptext
>
> Yet if I replace "\blackboard{ABCD}" with \reals (or \naturalnumbers, or 
> \integers etc.), it works fine. What's wrong?

Works fine in MkIV. In MkII, we need

\unexpanded\def\blackboard  #1{\mathortext\domathtext\donothing{\bbd#1}}

Hans, can you apply the attached patch for font-ini.mkii?

Aditya

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diff --git a/font-ini.mkii b/font-ini.mkii
index 9eb532d..89fbb5d 100644
--- a/font-ini.mkii
+++ b/font-ini.mkii
@@ -3248,11 +3248,11 @@
 %
 % newer
 
-\def\os  {\mathortext{\fam\purefamily    {oldstyle}}{\symbolicfont    {OldStyle}}}
-\def\frak{\mathortext{\fam\purefamily     {fraktur}}{\symbolicfont     {Fraktur}}}
-\def\goth{\mathortext{\fam\purefamily      {gothic}}{\symbolicfont      {Gothic}}}
-\def\cal {\mathortext{\fam\purefamily{calligraphic}}{\symbolicfont{Calligraphic}}}
-\def\bbd {\mathortext{\fam\purefamily  {blackboard}}{\symbolicfont  {Blackboard}}}
+\unexpanded\def\os  {\mathortext{\fam\purefamily    {oldstyle}}{\symbolicfont    {OldStyle}}}
+\unexpanded\def\frak{\mathortext{\fam\purefamily     {fraktur}}{\symbolicfont     {Fraktur}}}
+\unexpanded\def\goth{\mathortext{\fam\purefamily      {gothic}}{\symbolicfont      {Gothic}}}
+\unexpanded\def\cal {\mathortext{\fam\purefamily{calligraphic}}{\symbolicfont{Calligraphic}}}
+\unexpanded\def\bbd {\mathortext{\fam\purefamily  {blackboard}}{\symbolicfont  {Blackboard}}}
 
 \definefontsynonym [OldStyle]     [Serif]
 \definefontsynonym [Fraktur]      [Serif]
@@ -3268,10 +3268,10 @@
 
 \ifx\mathtext\undefined \let\mathtext\hbox \fi
 
-\def\fraktur     #1{\mathortext\domathtext\donothing{\frak#1}}
-\def\gothic      #1{\mathortext\domathtext\donothing{\goth#1}}
-\def\calligraphic#1{\mathortext\domathtext\donothing{\cal #1}}
-\def\blackboard  #1{\mathortext\domathtext\donothing{\bbd#1}}
+\unexpanded\def\fraktur     #1{\mathortext\domathtext\donothing{\frak#1}}
+\unexpanded\def\gothic      #1{\mathortext\domathtext\donothing{\goth#1}}
+\unexpanded\def\calligraphic#1{\mathortext\domathtext\donothing{\cal #1}}
+\unexpanded\def\blackboard  #1{\mathortext\domathtext\donothing{\bbd#1}}
 
 %D Torture test:
 %D

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maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
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