> I think so implementation of simple expression evaluation should not be
> hard
Indeed it is not hard, it is rather a matter of deciding what it should
do, and the syntax to do it.
> - really just - we can expect so any variable will be replaced by
> const in expression
>
> Num (<|>|=|<=|>=) Num
<> and != would seem handy as well.
> Text (<|>|=|<=|>=) Text
What would be the use case for handling TEXT?
> not Bool, Bool (or|and) Bool
Aka logical expressions.
> and special operator "defined"
I'm still not buying this suggestion at all because it does not look like
SQL and I think that client-side expressions should be a simple subset of
SQL expressions, which a "defined" operators is definitely not.
>> Hmmm. I'm not sure I get it. The penalty I see is that it adds a dummy
>> variable which must be given a sensible name, and for very short
>> expressions this is not a win. But this is a minor point.
> I know so it is not ideal - but the language with commands "\if", "\else"
> ... is not ideal language.
Sure.
--
Fabien.
