Re: [Boost-bugs] [Boost C++ Libraries] #9234: noexcept creation of a number from string

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #9234: noexcept creation of a number from string
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2013-10-12 11:21:40

#9234: noexcept creation of a number from string
-------------------------------+----------------------------
  Reporter:  psiha             |      Owner:  johnmaddock
      Type:  Bugs              |     Status:  closed
 Milestone:  To Be Determined  |  Component:  multiprecision
   Version:  Boost 1.54.0      |   Severity:  Optimization
Resolution:  wontfix           |   Keywords:
-------------------------------+----------------------------

Comment (by psiha):

 * BOOST_NO_EXCEPTIONS disables exceptions for all Boost, that's not what I
 want...Exception semantics and overhead maybe appropriate in someplaces
 while not in others, IMNHO a subset of fixed-sized mathematical operations
 where I know in advance nothing should fail is one such place
 [[BR]]
 * the problem with (needless) EH is not (just) speed but bloat, you
 certainly know that any non-noexcept function makes all of its callers
 also non-noexcept and inserts EH code in all of them if they have objects
 with non trivial desctructors (which with MSVC is sadly even an empty but
 explicitly defined destructor) as well as it hinders things like inlining
 [[BR]]
 * in my use case for example I might know that I am passing a valid
 (possibly hardcoded) string and the only way your constructor can fail is
 if some hacker has fiddled with the binary in which case I don't want any
 expected error handling route to be taken (a call to throw is certainly
 one of them)...I really do want the process to visit a random star in the
 access vioalation galaxy using the undefined behaviour spaceship and then
 crash and burn there!
 [[BR]]
 * you might consider using boost::string_ref now to simplify your code

 I won't reopen this ticket, I'll rather create a new one for noexcept
 fixedsized unchecked unsigned cpp_ints...

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/9234#comment:2>
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