I worked for a long time coding Pop-11, a language which did have an elseunless to go along with its unless.

Never caused any problems in my experience.

Wasn't used a huge amount either - but I think it did increase the clarity of some code where it was used.

Personally I think that the argument for consistancy wins over the argument against due to confusion - the fact that we have to continually explain why there isn't an elseunless might be considered a clue :-)

In reply to Re: if/unless and chaining by adrianh
in thread if/unless and chaining by John M. Dlugosz

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