Changing decimals points to Persian ones via font features

Mohammad Hossein Bateni

1 Aug 2016 1 Aug '16

1:46 p.m.

Dear list, I want to add a customized font feature to the math font, to automatically change the decimal point (unicode 0x2E) to the Arabic/Farsi version (unicode 0x66B). This will go well with the mapping from Latin digits to Farsi digits (done in a sample with mathdigits fallback). For instance, I want to code in $123.45$ and get a result like ۱۲۳٫۴۵. However, I do not want to simply map 0x2E to 0x66B, because then "full stop" outside a number will also change. In particular, I'd like to have the mapping only when full-stop is preceded and succeeded by a digit. This will, among other things, leave the end-of-equation periods unchanged. Here is how I tried to achieve it. \startluacode digits = { 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39 } -- 0x66B instead of 0x2F gives an error! replacements = { [0x002E] = { 0x2F } } fonts.handlers.otf.addfeature { name = "mpf", type = "chainsubstitution", lookups = { { type = "multiple", data = replacements, } }, data = { rules = { { current = { { 0x002E } }, after = { digits }, before = { digits }, lookups = { 1 }, } } } } \stopluacode \definefontfeature[mathperiod][mpf=yes] \resetfontfallback [mathdigits] %\definefontfallback[mathdigits][dejavusansmono][digitsextendedarabicindic][check=yes,force=yes,offset=digitsnormal] \definefontsynonym [MathRoman][name:modern][features={math\mathsizesuffix,mathperiod},goodies=lm-math,fallbacks=mathdigits] \starttext $123.45.$ 123.45. \addff{mathperiod} 123.45. \stoptext Though this font feature works outside math, it does not seem to have any effect within the math font. Why is that? Can we add font feature to the math font? Are the character codes different? Notice that I could not get it to work, so I commented out the fallback for Persian digits, to make things simpler. To get the proof of concept, I am trying to change period to forward slash (see below). Is the syntax I use for having two features in \defontfontsynonym correct? Actually, I did try with only mathperiod and it does not work, either. When I change 0x2F (slash) to 0x066B in "replacements", I get an error as follows. fonts > otf chain > feature 'mpf', type 'gsub_contextchain', chain lookup 'mpf': rule 1 matches at char U+0002E (period) for (1,1,1) chars, lookuptype 'gsub_multiple' error: ...ext/tex/texmf-context/tex/context/base/mkiv/font-ots.lua:1232: attempt to index field '?' (a nil value) tex error > tex error on line 1 in file /Users/bateni/farsitex/context/bostan/examples/mathfa/1.tex: ? \page ->\par \dosingleempty \page_breaks_process \strc_pagenumbers_flush_final_page ...\else \page [\p_strc_pagenumbers_page ... \dostoptext ...\strc_pagenumbers_flush_final_page \page \the \everystoptext ... l.1 \dostoptext \clf_stoptext ->\luafunction \16>>clf_stoptext l.46 \stoptext Best, MHB

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Mohammad Hossein Bateni

2 Aug 2 Aug

7:54 p.m.

Could the problem be because math fonts use mode=base instead of mode=node? Or is it because in math fonts, the digits and/or full-stop have different codes? —MHB On Mon, Aug 1, 2016 at 9:46 AM, Mohammad Hossein Bateni wrote:

...

Dear list,

I want to add a customized font feature to the math font, to automatically change the decimal point (unicode 0x2E) to the Arabic/Farsi version (unicode 0x66B). This will go well with the mapping from Latin digits to Farsi digits (done in a sample with mathdigits fallback).

For instance, I want to code in $123.45$ and get a result like ۱۲۳٫۴۵. However, I do not want to simply map 0x2E to 0x66B, because then "full stop" outside a number will also change. In particular, I'd like to have the mapping only when full-stop is preceded and succeeded by a digit. This will, among other things, leave the end-of-equation periods unchanged.

Here is how I tried to achieve it.

\startluacode digits = { 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39 } -- 0x66B instead of 0x2F gives an error! replacements = { [0x002E] = { 0x2F } } fonts.handlers.otf.addfeature { name = "mpf", type = "chainsubstitution", lookups = { { type = "multiple", data = replacements, } }, data = { rules = { { current = { { 0x002E } }, after = { digits }, before = { digits }, lookups = { 1 }, } } } } \stopluacode

\definefontfeature[mathperiod][mpf=yes]

\resetfontfallback [mathdigits] %\definefontfallback[mathdigits][dejavusansmono][digitsextendedarabicindic][check=yes,force=yes,offset=digitsnormal]

\definefontsynonym [MathRoman][name:modern][features={math\mathsizesuffix,mathperiod},goodies=lm-math,fallbacks=mathdigits]

\starttext $123.45.$

123.45.

\addff{mathperiod} 123.45. \stoptext

Though this font feature works outside math, it does not seem to have any effect within the math font. Why is that? Can we add font feature to the math font? Are the character codes different?

Notice that I could not get it to work, so I commented out the fallback for Persian digits, to make things simpler. To get the proof of concept, I am trying to change period to forward slash (see below).

Is the syntax I use for having two features in \defontfontsynonym correct? Actually, I did try with only mathperiod and it does not work, either.

When I change 0x2F (slash) to 0x066B in "replacements", I get an error as follows.

fonts > otf chain > feature 'mpf', type 'gsub_contextchain', chain lookup 'mpf': rule 1 matches at char U+0002E (period) for (1,1,1) chars, lookuptype 'gsub_multiple'

error: ...ext/tex/texmf-context/tex/context/base/mkiv/font-ots.lua:1232: attempt to index field '?' (a nil value)

tex error > tex error on line 1 in file /Users/bateni/farsitex/context/bostan/examples/mathfa/1.tex: ?

\page ->\par \dosingleempty \page_breaks_process \strc_pagenumbers_flush_final_page ...\else \page

[\p_strc_pagenumbers_page ... \dostoptext ...\strc_pagenumbers_flush_final_page \page \the \everystoptext ... l.1 \dostoptext

\clf_stoptext ->\luafunction \16>>clf_stoptext

l.46 \stoptext

Best, MHB

Hans Hagen

8 Aug 8 Aug

2:44 p.m.

New subject: Changing decimals points to Persian ones via font features

On 8/2/2016 9:54 PM, Mohammad Hossein Bateni wrote:

...

Could the problem be because math fonts use mode=base instead of mode=node? Or is it because in math fonts, the digits and/or full-stop have different codes?

math fonts are defined and then don't change i.e. they are quite static and all juggling with individual symbols of sequences is done using predictable methods

...

—MHB

On Mon, Aug 1, 2016 at 9:46 AM, Mohammad Hossein Bateni mailto:bateni@gmail.com> wrote:

Dear list,

I want to add a customized font feature to the math font, to automatically change the decimal point (unicode 0x2E) to the Arabic/Farsi version (unicode 0x66B). This will go well with the mapping from Latin digits to Farsi digits (done in a sample with mathdigits fallback).

For instance, I want to code in $123.45$ and get a result like ۱۲۳٫۴۵. However, I do not want to simply map 0x2E to 0x66B, because then "full stop" outside a number will also change. In particular, I'd like to have the mapping only when full-stop is preceded and succeeded by a digit. This will, among other things, leave the end-of-equation periods unchanged.

Here is how I tried to achieve it.

\startluacode digits = { 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39 } -- 0x66B instead of 0x2F gives an error! replacements = { [0x002E] = { 0x2F } } fonts.handlers.otf.addfeature { name = "mpf", type = "chainsubstitution", lookups = { { type = "multiple", data = replacements, } }, data = { rules = { { current = { { 0x002E } }, after = { digits }, before = { digits }, lookups = { 1 }, } } } } \stopluacode

\definefontfeature[mathperiod][mpf=yes]

\resetfontfallback [mathdigits] %\definefontfallback[mathdigits][dejavusansmono][digitsextendedarabicindic][check=yes,force=yes,offset=digitsnormal]

\definefontsynonym [MathRoman][name:modern][features={math\mathsizesuffix,mathperiod},goodies=lm-math,fallbacks=mathdigits]

\starttext $123.45.$

123.45.

\addff{mathperiod} 123.45. \stoptext

Though this font feature works outside math, it does not seem to have any effect within the math font. Why is that? Can we add font feature to the math font? Are the character codes different?

Notice that I could not get it to work, so I commented out the fallback for Persian digits, to make things simpler. To get the proof of concept, I am trying to change period to forward slash (see below).

Is the syntax I use for having two features in \defontfontsynonym correct? Actually, I did try with only mathperiod and it does not work, either.

When I change 0x2F (slash) to 0x066B in "replacements", I get an error as follows.

fonts > otf chain > feature 'mpf', type 'gsub_contextchain', chain lookup 'mpf': rule 1 matches at char U+0002E (period) for (1,1,1) chars, lookuptype 'gsub_multiple'

error: ...ext/tex/texmf-context/tex/context/base/mkiv/font-ots.lua:1232: attempt to index field '?' (a nil value)

tex error > tex error on line 1 in file /Users/bateni/farsitex/context/bostan/examples/mathfa/1.tex: ?

\page ->\par \dosingleempty \page_breaks_process \strc_pagenumbers_flush_final_page ...\else \page

[\p_strc_pagenumbers_page ... \dostoptext ...\strc_pagenumbers_flush_final_page \page \the \everystoptext ... l.1 \dostoptext

\clf_stoptext ->\luafunction \16>>clf_stoptext

l.46 \stoptext

Best, MHB

___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://tex.aanhet.net archive : http://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___________________________________________________________________________________

-- ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl -----------------------------------------------------------------

Mohammad Hossein Bateni

3:24 p.m.

Thanks, Hans! I see; this does work except for the trouble of annotating with \digits macro. Would it be possible if I wrote a processor in Lua to do the work? nodes.tasks.appendaction ("processors", "before", "fix_persian_mathperiod") Can I find out if a node is inside math? If I look at the corresponding font, how can I find out if this is a math font or not? I take it that in math fonts, kerning does not work, either? In my case, the Persian decimal separator usually has a part below the baseline that extends to the left, and because all (Persian) digits are above the baseline, I get an ugly space in the middle. If kerning is not possible at all, I can try to change the dimensions of Persian decimal separator symbol because the kern is always necessary. Is it possible to change the dimensions of the symbol or is that also fixed and unchangeable? Thanks a lot! —MHB On Mon, Aug 8, 2016 at 10:44 AM, Hans Hagen wrote:

...

On 8/2/2016 9:54 PM, Mohammad Hossein Bateni wrote:

...
Could the problem be because math fonts use mode=base instead of mode=node? Or is it because in math fonts, the digits and/or full-stop have different codes?

math fonts are defined and then don't change i.e. they are quite static and all juggling with individual symbols of sequences is done using predictable methods

—MHB

...
On Mon, Aug 1, 2016 at 9:46 AM, Mohammad Hossein Bateni mailto:bateni@gmail.com> wrote:

Dear list,

I want to add a customized font feature to the math font, to automatically change the decimal point (unicode 0x2E) to the Arabic/Farsi version (unicode 0x66B). This will go well with the mapping from Latin digits to Farsi digits (done in a sample with mathdigits fallback).

For instance, I want to code in $123.45$ and get a result like ۱۲۳٫۴۵. However, I do not want to simply map 0x2E to 0x66B, because then "full stop" outside a number will also change. In particular, I'd like to have the mapping only when full-stop is preceded and succeeded by a digit. This will, among other things, leave the end-of-equation periods unchanged.

Here is how I tried to achieve it.

\startluacode digits = { 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39 } -- 0x66B instead of 0x2F gives an error! replacements = { [0x002E] = { 0x2F } } fonts.handlers.otf.addfeature { name = "mpf", type = "chainsubstitution", lookups = { { type = "multiple", data = replacements, } }, data = { rules = { { current = { { 0x002E } }, after = { digits }, before = { digits }, lookups = { 1 }, } } } } \stopluacode

\definefontfeature[mathperiod][mpf=yes]

\resetfontfallback [mathdigits] %\definefontfallback[mathdigits][dejavusansmono][digitsexten dedarabicindic][check=yes,force=yes,offset=digitsnormal]

\definefontsynonym [MathRoman][name:modern][features={math\mathsizesuffix,mathp eriod},goodies=lm-math,fallbacks=mathdigits]

\starttext $123.45.$

123.45.

\addff{mathperiod} 123.45. \stoptext

Though this font feature works outside math, it does not seem to have any effect within the math font. Why is that? Can we add font feature to the math font? Are the character codes different?

Notice that I could not get it to work, so I commented out the fallback for Persian digits, to make things simpler. To get the proof of concept, I am trying to change period to forward slash (see below).

Is the syntax I use for having two features in \defontfontsynonym correct? Actually, I did try with only mathperiod and it does not work, either.

When I change 0x2F (slash) to 0x066B in "replacements", I get an error as follows.

fonts > otf chain > feature 'mpf', type 'gsub_contextchain', chain lookup 'mpf': rule 1 matches at char U+0002E (period) for (1,1,1) chars, lookuptype 'gsub_multiple'

error: ...ext/tex/texmf-context/tex/context/base/mkiv/font-ots.lua:1232: attempt to index field '?' (a nil value)

tex error > tex error on line 1 in file /Users/bateni/farsitex/context/bostan/examples/mathfa/1.tex: ?

\page ->\par \dosingleempty \page_breaks_process \strc_pagenumbers_flush_final_page ...\else \page

[\p_strc_pagenumbers_page ... \dostoptext ...\strc_pagenumbers_flush_final_page \page \the \everystoptext ... l.1 \dostoptext

\clf_stoptext ->\luafunction \16>>clf_stoptext

l.46 \stoptext

Best, MHB

____________________________________________________________ _______________________ If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/list info/ntg-context webpage : http://www.pragma-ade.nl / http://tex.aanhet.net archive : http://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ____________________________________________________________ _______________________

--

----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl ----------------------------------------------------------------- ____________________________________________________________ _______________________ If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/list info/ntg-context webpage : http://www.pragma-ade.nl / http://tex.aanhet.net archive : http://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ____________________________________________________________ _______________________

Hans Hagen

3:36 p.m.

New subject: Changing decimals points to Persian ones via font features

On 8/8/2016 5:24 PM, Mohammad Hossein Bateni wrote:

...

Thanks, Hans!

I see; this does work except for the trouble of annotating with \digits macro. Would it be possible if I wrote a processor in Lua to do the work?

nodes.tasks.appendaction ("processors", "before", "fix_persian_mathperiod")

Can I find out if a node is inside math? If I look at the corresponding font, how can I find out if this is a math font or not?

it's doable but then you also have to fight exceptions and that is no fun

...

I take it that in math fonts, kerning does not work, either? In my case, the Persian decimal separator usually has a part below the baseline that extends to the left, and because all (Persian) digits are above the baseline, I get an ugly space in the middle. If kerning is not possible at all, I can try to change the dimensions of Persian decimal separator symbol because the kern is always necessary. Is it possible to change the dimensions of the symbol or is that also fixed and unchangeable?

probably best is to collect all that info, also for different math fonts, and then cook up some virtual font support for it (across fonts), if only because digits is one aspect if bidi math and there is more needed

...

Thanks a lot! —MHB

On Mon, Aug 8, 2016 at 10:44 AM, Hans Hagen mailto:pragma@wxs.nl> wrote:

On 8/2/2016 9:54 PM, Mohammad Hossein Bateni wrote:

Could the problem be because math fonts use mode=base instead of mode=node? Or is it because in math fonts, the digits and/or full-stop have different codes?

math fonts are defined and then don't change i.e. they are quite static and all juggling with individual symbols of sequences is done using predictable methods

—MHB

On Mon, Aug 1, 2016 at 9:46 AM, Mohammad Hossein Bateni mailto:bateni@gmail.com mailto:bateni@gmail.com>> wrote:

Dear list,

I want to add a customized font feature to the math font, to automatically change the decimal point (unicode 0x2E) to the Arabic/Farsi version (unicode 0x66B). This will go well with the mapping from Latin digits to Farsi digits (done in a sample with mathdigits fallback).

For instance, I want to code in $123.45$ and get a result like ۱۲۳٫۴۵. However, I do not want to simply map 0x2E to 0x66B, because then "full stop" outside a number will also change. In particular, I'd like to have the mapping only when full-stop is preceded and succeeded by a digit. This will, among other things, leave the end-of-equation periods unchanged.

Here is how I tried to achieve it.

\startluacode digits = { 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39 } -- 0x66B instead of 0x2F gives an error! replacements = { [0x002E] = { 0x2F } } fonts.handlers.otf.addfeature { name = "mpf", type = "chainsubstitution", lookups = { { type = "multiple", data = replacements, } }, data = { rules = { { current = { { 0x002E } }, after = { digits }, before = { digits }, lookups = { 1 }, } } } } \stopluacode

\definefontfeature[mathperiod][mpf=yes]

\resetfontfallback [mathdigits]

%\definefontfallback[mathdigits][dejavusansmono][digitsextendedarabicindic][check=yes,force=yes,offset=digitsnormal]

\definefontsynonym

[MathRoman][name:modern][features={math\mathsizesuffix,mathperiod},goodies=lm-math,fallbacks=mathdigits]

\starttext $123.45.$

123.45.

\addff{mathperiod} 123.45. \stoptext

Though this font feature works outside math, it does not seem to have any effect within the math font. Why is that? Can we add font feature to the math font? Are the character codes different?

Notice that I could not get it to work, so I commented out the fallback for Persian digits, to make things simpler. To get the proof of concept, I am trying to change period to forward slash (see below).

Is the syntax I use for having two features in \defontfontsynonym correct? Actually, I did try with only mathperiod and it does not work, either.

When I change 0x2F (slash) to 0x066B in "replacements", I get an error as follows.

fonts > otf chain > feature 'mpf', type 'gsub_contextchain', chain lookup 'mpf': rule 1 matches at char U+0002E (period) for (1,1,1) chars, lookuptype 'gsub_multiple'

error:

...ext/tex/texmf-context/tex/context/base/mkiv/font-ots.lua:1232: attempt to index field '?' (a nil value)

tex error > tex error on line 1 in file /Users/bateni/farsitex/context/bostan/examples/mathfa/1.tex: ?

\page ->\par \dosingleempty \page_breaks_process \strc_pagenumbers_flush_final_page ...\else \page

[\p_strc_pagenumbers_page ... \dostoptext ...\strc_pagenumbers_flush_final_page \page \the \everystoptext ... l.1 \dostoptext

\clf_stoptext ->\luafunction \16>>clf_stoptext

l.46 \stoptext

Best, MHB

___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl mailto:ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://tex.aanhet.net archive : http://foundry.supelec.fr/projects/contextrev/ http://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___________________________________________________________________________________

--

----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | www.pragma-ade.nl http://www.pragma-ade.nl | www.pragma-pod.nl http://www.pragma-pod.nl ----------------------------------------------------------------- ___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl mailto:ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://tex.aanhet.net archive : http://foundry.supelec.fr/projects/contextrev/ http://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___________________________________________________________________________________

___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://tex.aanhet.net archive : http://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___________________________________________________________________________________

Hans Hagen

2:42 p.m.

New subject: Changing decimals points to Persian ones via font features

On 8/1/2016 3:46 PM, Mohammad Hossein Bateni wrote:

...

Dear list,

I want to add a customized font feature to the math font, to automatically change the decimal point (unicode 0x2E) to the Arabic/Farsi version (unicode 0x66B). This will go well with the mapping from Latin digits to Farsi digits (done in a sample with mathdigits fallback).

For instance, I want to code in $123.45$ and get a result like ۱۲۳٫۴۵. However, I do not want to simply map 0x2E to 0x66B, because then "full stop" outside a number will also change. In particular, I'd like to have the mapping only when full-stop is preceded and succeeded by a digit. This will, among other things, leave the end-of-equation periods unchanged.

Here is how I tried to achieve it.

\startluacode digits = { 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39 } -- 0x66B instead of 0x2F gives an error! replacements = { [0x002E] = { 0x2F } } fonts.handlers.otf.addfeature { name = "mpf", type = "chainsubstitution", lookups = { { type = "multiple", data = replacements, } }, data = { rules = { { current = { { 0x002E } }, after = { digits }, before = { digits }, lookups = { 1 }, } } } } \stopluacode

\definefontfeature[mathperiod][mpf=yes]

\resetfontfallback [mathdigits] %\definefontfallback[mathdigits][dejavusansmono][digitsextendedarabicindic][check=yes,force=yes,offset=digitsnormal]

\definefontsynonym [MathRoman][name:modern][features={math\mathsizesuffix,mathperiod},goodies=lm-math,fallbacks=mathdigits]

\starttext $123.45.$

123.45.

\addff{mathperiod} 123.45. \stoptext

Though this font feature works outside math, it does not seem to have any effect within the math font. Why is that? Can we add font feature to the math font? Are the character codes different?

Notice that I could not get it to work, so I commented out the fallback for Persian digits, to make things simpler. To get the proof of concept, I am trying to change period to forward slash (see below).

Is the syntax I use for having two features in \defontfontsynonym correct? Actually, I did try with only mathperiod and it does not work, either.

When I change 0x2F (slash) to 0x066B in "replacements", I get an error as follows.

fonts > otf chain > feature 'mpf', type 'gsub_contextchain', chain lookup 'mpf': rule 1 matches at char U+0002E (period) for (1,1,1) chars, lookuptype 'gsub_multiple'

error: ...ext/tex/texmf-context/tex/context/base/mkiv/font-ots.lua:1232: attempt to index field '?' (a nil value)

tex error > tex error on line 1 in file /Users/bateni/farsitex/context/bostan/examples/mathfa/1.tex: ?

\page ->\par \dosingleempty \page_breaks_process \strc_pagenumbers_flush_final_page ...\else \page

[\p_strc_pagenumbers_page ... \dostoptext ...\strc_pagenumbers_flush_final_page \page \the \everystoptext ... l.1 \dostoptext

\clf_stoptext ->\luafunction \16>>clf_stoptext

l.46 \stoptext

there are no features in math as in text if only because in math each symbol is a separate entity (so 1.2 is three things) .. you can try: \def\digitsperiodsymbol{!} $ ... \digits{123.456} ... $ ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl -----------------------------------------------------------------

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