History and evolution of the noexcept proposal?

Message-ID	<io0u5e$7l2$1@dont-email.me> (permalink)
Newsgroups	comp.std.c++, comp.lang.c++.moderated
From	"Martin B." <0xCDCDCDCD@gmx.at>
Subject	History and evolution of the noexcept proposal?
Organization	A noiseless patient Spider
Date	2011-04-12 13:10 -0600

Cross-posted to 2 groups.

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Hi!

As the thread [How on earth did noexcept get through the standards
process?][1] on c.l.c++.m has shown, there is a lot of confusion,
disappointment and questions around `noexcept`.

While the feature we've got is apparently the feature we've got for now -
[We have FDIS!][2] - I at least would find it interesting to see a history
of how `noexcept` evolved into the current form [N3242][3] (see, among other
sections, 15.5.1 The std::terminate() function).

Danny Kalev did a great job about a year ago of summarizing [The debate on
noexcept][4] but I am unclear if there are any more recent changes wrt this
feature and also whether he's spot on on all arguments.

I think the following bullets would help in isolation to clear up some
questions that arose in [1]:

* Search help: Is there an easy way of searching/finding/obtaining a list of
all WG21 proposals and papers that deal with `noexcept` and for each to
verify when it was accepted or rejected and why?

* Rationale: Why was the noexcept-block, as proposed in [N2855][5], scraped?
This block would have made it trivial for compilers to statically "enforce"
`noexcept`, just as they "enforce" `const` at the moment.

* Rationale: Why did "call terminate()" win over "undefined behaviour" for
`noexcept` violations.

* Rationale: Why was it left implementation-defined, whether the stack would
be unwound/partially in case of a noexcept violation?


Any pointers appreciated. Please keep the guesswork to a minimum and mark it
clearly as guesswork :-)

cheers,
Martin

      [1] :
http://groups.google.com/group/comp.lang.c++.moderated/browse_frm/thread/9adab213129c178/7afafcdf84c5f7b1
      [2] :
http://herbsutter.com/2011/03/25/we-have-fdis-trip-report-march-2011-c-standards-meeting/
      [3] : http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2011/n3242.pdf
      [4] : http://www.informit.com/guides/content.aspx?g=cplusplus&seqNum=481
      [5] :
http://www.open-std.org/JTC1/SC22/WG21/docs/papers/2009/n2855.html#noexcept-block


-- 
Stop Software Patents
http://petition.stopsoftwarepatents.eu/841006602158/
http://www.ffii.org/


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History and evolution of the noexcept proposal?  "Martin B." <0xCDCDCDCD@gmx.at> - 2011-04-12 13:10 -0600
  Re: History and evolution of the noexcept proposal? "Martin B." <0xCDCDCDCD@gmx.at> - 2011-04-28 12:19 -0600

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