While going through the posts I had stowed away because I found them interesting, I came along this one.
There is not a problem here, just a tiny observation.

In order to work
   \doifelse{a}{\doifelse{x}{x}{a}{b}}{yes}{no}
properly it is sufficient that the inner \doifelse is of the expandable kind.

Thus
   \doifelse{a}{\expdoifelse{x}{x}{a}{b}}{yes}{no}
yields the same as
  \expdoifelse{a}{\expdoifelse{x}{x}{a}{b}}{yes}{no}

Hans van der Meer




On 21 May 2017, at 10:21, Wolfgang Schuster <schuster.wolfgang@gmail.com<mailto:schuster.wolfgang@gmail.com>> wrote:

\starttext

\expdoifelse{a}{\expdoifelse{x}{x}{a}{b}}
  {yes}
  {no}

\stoptext

Wolfgang

Henri Menke<mailto:henrimenke@gmail.com>
21. Mai 2017 um 10:14
Dear list,

Motivated by this question on TeX.SX https://tex.stackexchange.com/questions/370868 I was fiddling around with the \doifelse conditionals. I noticed that most of them are not expandable, which makes it very difficult to concatenate them. Here a simple example

\starttext

\doifelse{a}{%
\doifelse{x}{x}{a}{b}% <- evaluates to "a" but not expandable
}{yes}{no}

\stoptext

This outputs "no" even though "a" is equal to "a".

Would it be possible to substitute these conditionals by expandable ones? I would volunteer to help make them expandable.

Cheers, Henri
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