On 30.07.2013 18:20, Mark Morgan Lloyd wrote:
Now specifically to your question - I believe that one of the reasons may
be the fact that Pascal does not support unary arithmetic operators in
postfix notation. The fact that C allows using them with both prefix and
postfix notation makes them even more difficult from my point of view
because potentially allowing them only in one of the notations known from
other languages would immediately trigger users to ask why only one of
possible notations (common elsewhere) is supported and the other not.
I've got a vague recollection that some of the ++ and -- semantics are
particularly unpleasant, and that one of the C inventors did his best to
disown them. At least += etc. are fairly unambiguous: they're almost
macro expansions and as such they don't mandate any extra overloadable
operators etc.
The most important points with these operators is to remember that they
are once "increase/decrease then return" (prefix) and once "return then
increase/decrease" (postfix)
Regards,
Sven
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