[NTG-context] \luaescapestring in proper Lua

[NTG-context] \luaescapestring in proper Lua

[Pablo Rodriguez via ntg-context]

Dear list,

I have the following sample:

  \starttext
  \startluacode
  function document.print_the_thing(str)
    context(str)
  end
  \stopluacode

  \unexpanded\def\PrintTheThing#1{%
    \ctxlua{document.print_the_thing([[\luaescapestring{#1}]])}}

  \PrintTheThing{a \em b {c}}
  \stoptext

I wonder whether there is a proper way in the Lua code to avoid
[[\luaescapestring{}]] in \ctxlua.

BTW, [[\luaescapestring{}]] in \ctxlua works better for me, since in my
real world document, I’m using str:match() to check whether the string
ends with interrogation or exclamation marks ("%?!$").

Many thanks for your help,

Pablo
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[NTG-context] Re: \luaescapestring in proper Lua

[Hans Hagen via ntg-context]

On 4/10/2024 7:49 PM, Pablo Rodriguez via ntg-context wrote:
> Dear list,
> 
> I have the following sample:
> 
>    \starttext
>    \startluacode
>    function document.print_the_thing(str)
>      context(str)
>    end
>    \stopluacode
> 
>    \unexpanded\def\PrintTheThing#1{%
>      \ctxlua{document.print_the_thing([[\luaescapestring{#1}]])}}
> 
>    \PrintTheThing{a \em b {c}}
>    \stoptext
> 
> I wonder whether there is a proper way in the Lua code to avoid
> [[\luaescapestring{}]] in \ctxlua.
> 
> BTW, [[\luaescapestring{}]] in \ctxlua works better for me, since in my
> real world document, I’m using str:match() to check whether the string
> ends with interrogation or exclamation marks ("%?!$").
\starttext
   \startluacode
       function document.print_the_thing()
         context(tokens.scanners.string())
       end
   \stopluacode

   \protected\def\PrintTheThing{\ctxlua{document.print_the_thing()}}

   \PrintTheThing{a \em b {\bf c} d}
\stoptext

bonus:

   test!\removepunctuation ?

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
-----------------------------------------------------------------

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___________________________________________________________________________________

[NTG-context] Re: \luaescapestring in proper Lua

[Pablo Rodriguez via ntg-context]

On 4/10/24 21:48, Hans Hagen via ntg-context wrote:
> On 4/10/2024 7:49 PM, Pablo Rodriguez via ntg-context wrote:
>> [...]
>> I wonder whether there is a proper way in the Lua code to avoid
>> [[\luaescapestring{}]] in \ctxlua.
>> [...]
>          context(tokens.scanners.string())

Many thanks for your reply, Hans.

> \protected\def\PrintTheThing{\ctxlua{document.print_the_thing()}}

Sorry, but why \protected is required or recommended here?

Many thanks for your help,

Pablo
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___________________________________________________________________________________

[NTG-context] Re: \luaescapestring in proper Lua

[Hans Hagen via ntg-context]

On 4/11/2024 5:07 PM, Pablo Rodriguez via ntg-context wrote:
> On 4/10/24 21:48, Hans Hagen via ntg-context wrote:
>> On 4/10/2024 7:49 PM, Pablo Rodriguez via ntg-context wrote:
>>> [...]
>>> I wonder whether there is a proper way in the Lua code to avoid
>>> [[\luaescapestring{}]] in \ctxlua.
>>> [...]
>>           context(tokens.scanners.string())
> 
> Many thanks for your reply, Hans.
> 
>> \protected\def\PrintTheThing{\ctxlua{document.print_the_thing()}}
> 
> Sorry, but why \protected is required or recommended here?

depends if you want it to be expandable

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

maillist : ntg-context@ntg.nl / https://mailman.ntg.nl/mailman3/lists/ntg-context.ntg.nl
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archive  : https://github.com/contextgarden/context
wiki     : https://wiki.contextgarden.net
___________________________________________________________________________________

[NTG-context] Re: \luaescapestring in proper Lua

[Pablo Rodriguez via ntg-context]

On 4/11/24 18:56, Hans Hagen via ntg-context wrote:
> [...]
>>> \protected\def\PrintTheThing{\ctxlua{document.print_the_thing()}}
>>
>> Sorry, but why \protected is required or recommended here?
>
> depends if you want it to be expandable

I see now that "still.pdf" has a full chapter (#3, titled “Scanning
Input”) and page 79 explains exactly this.

Many thanks for your help,

Pablo

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___________________________________________________________________________________