Re: \input introduces space

[Hans Hagen <pragma@wxs.nl>]

Taco Hoekwater wrote:
> Hi Peter,
>
> Not the \input command, but the end-of-line in the inputted file
> is creating the space, indirectly. TeX normally appends a character
> with the current value of \endlinechar to each line of an input-ed
> file, and that character is later converted to a space.
>
> Setting \endlinechar to -1 temporarily is a possibility, another
> is writing a percent sign to the end of the line, yet another is
> ending the written line with \relax (or a similar space-gobbling
> command), and finally changing the catcode of the current
> \endlinechar to 9 (ignored) also works.
>
> Cheers, Taco
>
> Peter M�nster wrote:
>   
>> Hello,
>> \input seems to introduce a space. Example:
>>
>> \starttext
>> \immediate\write18{echo -n X >bla.tex}
>> X\input bla\relax X
>> \stoptext
>>
>> How could I get rid of this space?
>>
>> Cheers, Peter
>>
>>     
in addition to taco's answers: 

X\ignorespaces \input bla\relax \removeunwantedspaces X

can help you out; 

btw, can you wikify taco's response? somewhere under 'how tex reads input'; in due time we can then add some additional info about how scantokens etc behave (everyeof stuff and such) 

Hans 

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