Re: \if, \elseif, \else, \endif (was Re: [HACKERS] PSQL commands:\quit_if, \quit_unless)

> Just realized that '?' means "unknown transactional status" in %x. That
> might cause confusion if a person had a prompt of %x%R. Is that enough
> reason to pick a different cue?

Argh.

"\?\.?[tfz]" seems distinctive enough. Note that %R uses "'=-*^!$( and %x 
uses *!?, which means that they already share 2 characters, so adding ? 
does not seem like a big issue if it was not one before.

Otherwise, maybe "&" or "%", but it is less about a condition.

-- 
Fabien.