Can't use MetaFun with mplib anymore

Can't use MetaFun with mplib anymore

[Henri Menke]

Dear list,

Something has changed in MetaFun and it can no longer be used in plain LuaTeX,
with neither of

    luatex test.tex
    mtxrun --script plain test.tex

This is the error:

    >> LUATEXFUNCTIONALITY
    >> "mp.print(LUATEXFUNCTIONALITY)"
    ! Equation cannot be performed (numeric=string).

MWE is below, as always.

Cheers, Henri

---

\directlua{
local mpkpse = kpse.new(arg[0], "mpost")

local function finder(name, mode, ftype)
    if mode == "w" then
        return name
    else
        return mpkpse:find_file(name,ftype)
    end
end

local mpx = mplib.new {
    find_file = finder
}
local ret = mpx:execute[[
boolean mplib ; mplib := true ;
input metafun.mp ;
]]

print(ret.log)
}
\bye

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Re: Can't use MetaFun with mplib anymore

[Hans Hagen]

On 3/14/2019 5:56 AM, Henri Menke wrote:
> 
> Dear list,
> 
> Something has changed in MetaFun and it can no longer be used in plain LuaTeX,
> with neither of
> 
>      luatex test.tex
>      mtxrun --script plain test.tex
> 
> This is the error:
> 
>      >> LUATEXFUNCTIONALITY
>      >> "mp.print(LUATEXFUNCTIONALITY)"
>      ! Equation cannot be performed (numeric=string).

hm, that can be

mp.print(LUATEXFUNCTIONALITY or 0)

but ... i'm surprised you can use metafun in plain at all ... i never 
test that and to be honest am not too motivated to support mpiv code in 
generic either .. better use

\startMPpage
\stopMPpage

with context and then include the pdf

Hans

> MWE is below, as always.
> 
> Cheers, Henri
> 
> ---
> 
> \directlua{
> local mpkpse = kpse.new(arg[0], "mpost")
> 
> local function finder(name, mode, ftype)
>      if mode == "w" then
>          return name
>      else
>          return mpkpse:find_file(name,ftype)
>      end
> end
> 
> local mpx = mplib.new {
>      find_file = finder
> }
> local ret = mpx:execute[[
> boolean mplib ; mplib := true ;
> input metafun.mp ;
> ]]
> 
> print(ret.log)
> }
> \bye
> 
> ___________________________________________________________________________________
> 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://context.aanhet.net
> archive  : https://bitbucket.org/phg/context-mirror/commits/
> 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/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://context.aanhet.net
archive  : https://bitbucket.org/phg/context-mirror/commits/
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___________________________________________________________________________________

Re: Can't use MetaFun with mplib anymore

[Henri Menke]

On 3/14/19 8:49 PM, Hans Hagen wrote:
> On 3/14/2019 5:56 AM, Henri Menke wrote:
>>
>> Dear list,
>>
>> Something has changed in MetaFun and it can no longer be used in plain
>> LuaTeX,
>> with neither of
>>
>>      luatex test.tex
>>      mtxrun --script plain test.tex
>>
>> This is the error:
>>
>>      >> LUATEXFUNCTIONALITY
>>      >> "mp.print(LUATEXFUNCTIONALITY)"
>>      ! Equation cannot be performed (numeric=string).
> 
> hm, that can be
> 
> mp.print(LUATEXFUNCTIONALITY or 0)
> 
> but ... i'm surprised you can use metafun in plain at all ... i never
> test that and to be honest am not too motivated to support mpiv code in
> generic either .. better use

Until TeX Live 2018, MetaFun worked in plain (at least the subset I'm
using).  It would be a shame if the support would end.  I also think
that there are quite a number of users.  The number of posts on TeX
Stack Exchange mentioning luamplib with metafun is not negligible.
https://tex.stackexchange.com/search?q=mplibsetformat

I (and probably a lot of other people) would really appreciate if you
could apply Luigi's fix, so we can continue do enjoy MetaFun, even
outside ConTeXt.

Cheers, Henri

> 
> \startMPpage
> \stopMPpage
> 
> with context and then include the pdf
> 
> Hans
> 
>> MWE is below, as always.
>>
>> Cheers, Henri
>>
>> ---
>>
>> \directlua{
>> local mpkpse = kpse.new(arg[0], "mpost")
>>
>> local function finder(name, mode, ftype)
>>      if mode == "w" then
>>          return name
>>      else
>>          return mpkpse:find_file(name,ftype)
>>      end
>> end
>>
>> local mpx = mplib.new {
>>      find_file = finder
>> }
>> local ret = mpx:execute[[
>> boolean mplib ; mplib := true ;
>> input metafun.mp ;
>> ]]
>>
>> print(ret.log)
>> }
>> \bye
>>
>> ___________________________________________________________________________________
>>
>> 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://context.aanhet.net
>> archive  : https://bitbucket.org/phg/context-mirror/commits/
>> wiki     : http://contextgarden.net
>> ___________________________________________________________________________________
>>
>>
> 
> 

___________________________________________________________________________________
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maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://context.aanhet.net
archive  : https://bitbucket.org/phg/context-mirror/commits/
wiki     : http://contextgarden.net
___________________________________________________________________________________

Re: Can't use MetaFun with mplib anymore

[Hans Hagen]

On 3/14/2019 10:00 AM, Henri Menke wrote:
> On 3/14/19 8:49 PM, Hans Hagen wrote:
>> On 3/14/2019 5:56 AM, Henri Menke wrote:
>>>
>>> Dear list,
>>>
>>> Something has changed in MetaFun and it can no longer be used in plain
>>> LuaTeX,
>>> with neither of
>>>
>>>       luatex test.tex
>>>       mtxrun --script plain test.tex
>>>
>>> This is the error:
>>>
>>>       >> LUATEXFUNCTIONALITY
>>>       >> "mp.print(LUATEXFUNCTIONALITY)"
>>>       ! Equation cannot be performed (numeric=string).
>>
>> hm, that can be
>>
>> mp.print(LUATEXFUNCTIONALITY or 0)
>>
>> but ... i'm surprised you can use metafun in plain at all ... i never
>> test that and to be honest am not too motivated to support mpiv code in
>> generic either .. better use
> 
> Until TeX Live 2018, MetaFun worked in plain (at least the subset I'm
> using).  It would be a shame if the support would end.  I also think
> that there are quite a number of users.  The number of posts on TeX
> Stack Exchange mentioning luamplib with metafun is not negligible.
> https://tex.stackexchange.com/search?q=mplibsetformat

ok, as long as no one expects me to check functionality in plain usage

things like special colors and shading and some font related options 
won't work, so in that case the stand alone graphics are better

(there are quite some metafun macros that assume the lua extensions that 
context provides and some upcoming extra modules, for sure will not work 
in plain ... no problem as long as these macros are not used ...)

> I (and probably a lot of other people) would really appreciate if you
> could apply Luigi's fix, so we can continue do enjoy MetaFun, even
> outside ConTeXt.
i'll comment the line

Hans

-----------------------------------------------------------------
                                           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/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://context.aanhet.net
archive  : https://bitbucket.org/phg/context-mirror/commits/
wiki     : http://contextgarden.net
___________________________________________________________________________________

Re: Can't use MetaFun with mplib anymore

[luigi scarso]

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On Thu, Mar 14, 2019 at 5:56 AM Henri Menke <henrimenke@gmail.com> wrote:

>
> Dear list,
>
> Something has changed in MetaFun and it can no longer be used in plain
> LuaTeX,
> with neither of
>
>     luatex test.tex
>     mtxrun --script plain test.tex
>
> This is the error:
>
>     >> LUATEXFUNCTIONALITY
>     >> "mp.print(LUATEXFUNCTIONALITY)"
>     ! Equation cannot be performed (numeric=string).
>
> MWE is below, as always.
>
> Cheers, Henri
>
> ---
>
> \directlua{
> local mpkpse = kpse.new(arg[0], "mpost")
>
> local function finder(name, mode, ftype)
>     if mode == "w" then
>         return name
>     else
>         return mpkpse:find_file(name,ftype)
>     end
> end
>
> local mpx = mplib.new {
>     find_file = finder
> }
> local ret = mpx:execute[[
> boolean mplib ; mplib := true ;
> input metafun.mp ;
> ]]
>
> print(ret.log)
> }
> \bye
>
>
in mp-mlib.mpiv it seems that we should have
string  LUATEXFUNCTIONALITY ; LUATEXFUNCTIONALITY :=
runscript("mp.print(LUATEXFUNCTIONALITY)") ;
instead of
numeric LUATEXFUNCTIONALITY ; LUATEXFUNCTIONALITY :=
runscript("mp.print(LUATEXFUNCTIONALITY)") ;

Now I have
tex/texmf-context/metapost/context/base/mpiv$ grep -r LUATEXFUNCTIONALITY
mp-mlib.mpiv:%numeric LUATEXFUNCTIONALITY ; LUATEXFUNCTIONALITY :=
runscript("mp.print(LUATEXFUNCTIONALITY)") ;
mp-mlib.mpiv:string  LUATEXFUNCTIONALITY ; LUATEXFUNCTIONALITY :=
runscript("mp.print(LUATEXFUNCTIONALITY)") ;

and your example looks ok.

-- 
luigi

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

Re: Can't use MetaFun with mplib anymore

[Hans Hagen]

On 3/14/2019 8:51 AM, luigi scarso wrote:
> 
> 
> On Thu, Mar 14, 2019 at 5:56 AM Henri Menke <henrimenke@gmail.com 
> <mailto:henrimenke@gmail.com>> wrote:
> 
> 
>     Dear list,
> 
>     Something has changed in MetaFun and it can no longer be used in
>     plain LuaTeX,
>     with neither of
> 
>          luatex test.tex
>          mtxrun --script plain test.tex
> 
>     This is the error:
> 
>          >> LUATEXFUNCTIONALITY
>          >> "mp.print(LUATEXFUNCTIONALITY)"
>          ! Equation cannot be performed (numeric=string).
> 
>     MWE is below, as always.
> 
>     Cheers, Henri
> 
>     ---
> 
>     \directlua{
>     local mpkpse = kpse.new(arg[0], "mpost")
> 
>     local function finder(name, mode, ftype)
>          if mode == "w" then
>              return name
>          else
>              return mpkpse:find_file(name,ftype)
>          end
>     end
> 
>     local mpx = mplib.new {
>          find_file = finder
>     }
>     local ret = mpx:execute[[
>     boolean mplib ; mplib := true ;
>     input metafun.mp <http://metafun.mp> ;
>     ]]
> 
>     print(ret.log)
>     }
>     \bye
> 
> 
> in mp-mlib.mpiv it seems that we should have
> string  LUATEXFUNCTIONALITY ; LUATEXFUNCTIONALITY := 
> runscript("mp.print(LUATEXFUNCTIONALITY)") ;
> instead of
> numeric LUATEXFUNCTIONALITY ; LUATEXFUNCTIONALITY := 
> runscript("mp.print(LUATEXFUNCTIONALITY)") ;
> Now I have
> tex/texmf-context/metapost/context/base/mpiv$ grep -r LUATEXFUNCTIONALITY
> mp-mlib.mpiv:%numeric LUATEXFUNCTIONALITY ; LUATEXFUNCTIONALITY := 
> runscript("mp.print(LUATEXFUNCTIONALITY)") ;
> mp-mlib.mpiv:string  LUATEXFUNCTIONALITY ; LUATEXFUNCTIONALITY := 
> runscript("mp.print(LUATEXFUNCTIONALITY)") ;
> 
> and your example looks ok.
as currently the variable is isn't used we can also comment it

Hans

-----------------------------------------------------------------
                                           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/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://context.aanhet.net
archive  : https://bitbucket.org/phg/context-mirror/commits/
wiki     : http://contextgarden.net
___________________________________________________________________________________

Re: Can't use MetaFun with mplib anymore

[luigi scarso]

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On Thu, Mar 14, 2019 at 10:52 AM Hans Hagen <j.hagen@xs4all.nl> wrote:

> as currently the variable is isn't used we can also comment it
>
>
>
seems so
I have commented the line, and all formats and the plain test run.


-- 
luigi

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___________________________________________________________________________________
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maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
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wiki     : http://contextgarden.net
___________________________________________________________________________________