Re: Using \applytosplitstringwordspaced and allies

[Hans Hagen <j.hagen@xs4all.nl>]

On 8/8/2020 12:00 PM, Wolfgang Schuster wrote:
> Jairo A. del Rio schrieb am 08.08.2020 um 10:14:
>> Hi, list! :D
>> I've found \applytosplitstringwordspaced and many other commands 
>> reading on the mailing list and TeX StackExchange. An issue with those 
>> is: the following does not work:
>>
>> \applytosplitstringwordspaced\somemacro{\input knuth}
>>
>> It only works with explicit TeX "words". How to circumvent this 
>> inconvenience? Thanks in advance.
> 
> You can't feed knuth.tex to the command because it contains multiple 
> paragraphs but even when your file contains only a single paragraph it 
> isn't perfect because the linebreak after the last line contains as 
> extra word (seen in the first paragraph below).
> 
> To use \input as argument for \applytosplitstringwordspaced you need a 
> few \expandafter's to ensure the file is read before the argument is 
> passed to Lua. A easier method is to move everything to Lua where you 
> read the file and put it in a string, afterward you can use the CLD 
> mechanism to call \applytosplitstringwordspaced from Lua.
> 
> \unexpanded\def\somemacro#1{[#1]}
> 
> \starttext
> 
> \expandafter\applytosplitstringwordspaced\expandafter\somemacro\expandafter{\input 
> weisman }
> 
> \blank
> 
> \startluacode
> 
> -- local ward = io.loaddata(resolvers.findfile("ward.tex"))
> local ward = string.fullstrip(io.loaddata(resolvers.findfile("ward.tex")))
> 
> context.applytosplitstringwordspaced ( "\\somemacro", ward )
> 
> \stopluacode
> 
> \stoptext
just a remark: knuth.tex is tricky becauss it also has \TeX and \ and 
such, so one needs to escape it, as in:

context.applytosplitstringwordspaced (
   "\\somemacro",
   context.escape(ward)
)


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