Re: mixed-sign arithmetic and auto

Walter Bright <>
Mon, 14 Jan 2008 14:27:19 CST
Pete Becker wrote:

Java's success was largely the result of having a marketing department.

While a great marketing department is certainly helpful, it is a serious
mistake to dismiss Java that way (at least for a language designer, it is).

I regularly talk to heavy Java developers, with the aim of finding out
what works and what doesn't work for them. The same goes for C++. I even
talk with the Lisp guys when I can find one!

Naive programmers believe their claims that tightening the rules makes
programming far easier, despite the absence of concrete evidence.

Given the code in C++ and Java:

    a = foo() + bar();

which one would I have to rewrite as:

    tmp = foo();
    a = tmp + bar();

if there is an order of evaluation issue? How would I reliably detect
such an issue in the C++ version (putting on my QA hat)?

 From a QA standpoint, it's clearly easier to verify the Java version
than the C++ one. foo() is evaluated first, then bar(). That's easier to
deal with than hmm, which one happens first, and when might that change,
and do I have any order dependencies here?

Java does have a predictability issue with the gc, but that is separate
from integer, OOE, etc., issues.

Walter Bright
C, C++, D programming language compilers

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