[texhax] [solved] Re: Issue about `~' character

[Rodolfo Medina]

David Carlisle <d.p.carlisle at gmail.com> writes:

> On 30 September 2016 at 19:31, Rodolfo Medina <rodolfo.medina at gmail.com> wrote:
>> David Carlisle <d.p.carlisle at gmail.com> writes:
>>
>> Fantastic, that works in my case.  In this case you need three \string s.  I
>> couldn't imagine.  I had tried with two.
>
> don't think of it as three \string, its, just two tokens each preceded
> by \string so it gets written verbatim.
> You want your input file to have
>
> \string
> ~
> so to write that you can put \string before each token
>
> \sting\string
> \string~
>
>
> so it just more or less coincidentally ends up with three adjacent \string


I seem to understand...  Then when I put two \string 's before `~' what
happened?  How did TeX read and expand that?

Thanks,

Rodolfo