Re: Exception Names

=?ISO-8859-1?Q?Arne_Vajh=F8j?= <>
Sun, 29 Mar 2009 09:10:04 -0400
Mike Schilling wrote:

Arne Vajh?j wrote:

Mike Schilling wrote:

Lew wrote:

rossum wrote:

On Fri, 27 Mar 2009 11:58:20 +0000, Tom Anderson
<> wrote: should throw an EOFException instead of
-1 at the end of a stream. Checking return values for special
values is goofy C bullshit that we shouldn't be doing in the

It may bee goofy but it is very likely to be a whole lot faster.
Throwing and catching an exception is probably going to be a lot
slower than checking the return value.

Besides, there's nothing exceptional about reaching the end of a
stream. One would venture to say that one nearly always reaches
end of a stream, *unless* something exceptional happens.

Right; the most Java-ish thing would be for Streams to be

    while (stream.hasNext())
        char c =;

or even

    for (char c: stream)

1) performance would most likely not be good.

Because of two method calls rather than one?


2) semantics could become very confusing - either hexNext
   would do the actual read or for some types of streams next
   could fail even ig hasNext returned true

The semantics would have to be well-defined.

Well-defined is required but not sufficient to make it good.

                                             Since we're not assuming
any asynchrony, I'd expect hasNext() to do actual I/O, if that's
necessary to ensure that a character is available.

I don't think that is intuitive.

                                                   (This is hidden
when the for loop is used, anyway.)


It is only a problem when used more explicit.


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