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> > Juxtaposing = and == is always a syntax error in C.
> But there are many places -- conditional tests, for example -- where both
> are syntactically valid even though they are semantically very, very, very
> different.

    Hmmm.. That's true, but in my experience it is almost never a problem.

> Right now Lua is (mostly) semantically very clean.  (Upvalues and the like
> are a bit muddled, IMO.)  I'd like to see it not get infected by Cisms.

    I agree.  If we want C language features then we can program in C.