On 16 September 2014 14:58, Abel Braaksma (Exselt) abel(_at_)exselt(_dot_)net <
xsl-list-service(_at_)lists(_dot_)mulberrytech(_dot_)com> wrote:
Is the semantics of the "or" operator implementation-dependent?
No, the semantics not, the order of execution is, however, which means
that in error-cases, you can have different outcomes between processors.
This is not different from other languages, in C#, F#, Java, C++ similar
forms of optimization exist.
Considering §15.7 in the Java Language Specification: Do you have an
actual example/experience of some Java expression (logical "or") where
different outcomes between processors have been observed?
If you want to deterministically throw an error, use a more predictable
way of writing. I don't think I have ever come across a C++ style of code
like this (and even if you see it, it is considered code smell):
return a || functionThrowingException()
Instead, people tend to write:
return a ? a : functionThrowingException()
Even so, many a QA would not tolerate the required function.
-W
which is the equivalence of the if-then syntax in XPath.
Cheers,
Abel Braaksma
Exselt XSLT 3.0 streaming processor
http://exselt.net
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