Re: [Boost-bugs] [Boost C++ Libraries] #9810: boost serialization: deserialization from boost txt archive fails on -nan for double

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #9810: boost serialization: deserialization from boost txt archive fails on -nan for double
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2016-03-14 21:31:49

#9810: boost serialization: deserialization from boost txt archive fails on -nan
for double
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  Reporter:  florian.burkart@…  |      Owner:  ramey
      Type:  Feature Requests   |     Status:  reopened
 Milestone:  To Be Determined   |  Component:  serialization
   Version:  Boost 1.55.0       |   Severity:  Problem
Resolution:                     |   Keywords:
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Comment (by hdeanclark@…):

 I was taken by this behaviour also (in Serialization 1.60). Serialization
 was fine (to binary, text, and XML), but deserialization of text and XML
 choke due to NaN and +-Inf. A workaround is to imbue the stream with a
 facet so that non-finite values are correctly parsed [1]. Boost.Math
 provides such a facet: boost::math::nonfinite_num_get (and ...put). See
 documentation at [2].

 There is a nice posting at [3] showing how to use this facet and where to
 provide the Boost Serialization codecvt option.

 ---

 [1] Note that NaN payloads are not necessarily restored exactly, but they
 will be restored to _some_ NaN, depending on the platform. (I believe this
 issue was a major factor in omission from Serialization.) See the facet
 documentation for more information.

 [2]
 http://www.boost.org/doc/libs/1_50_0/libs/math/doc/sf_and_dist/html/math_toolkit/utils/fp_facets/intro.html


 [3] http://stackoverflow.com/questions/22203496/deserialization-of-non-

 finite-floating-point-numbers-fails-even-with-appropriate

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/9810#comment:5>
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