Re: [Boost-bugs] [Boost C++ Libraries] #4658: (boost::format("%u") % (unsigned char)2).str(); error result

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #4658: (boost::format("%u") % (unsigned char)2).str(); error result
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2017-10-12 17:58:58

#4658: (boost::format("%u") % (unsigned char)2).str(); error result
---------------------------+--------------------------------
  Reporter:  anonymous     |      Owner:  James E. King, III
      Type:  Bugs          |     Status:  assigned
 Milestone:  Boost 1.44.0  |  Component:  format
   Version:  Boost 1.44.0  |   Severity:  Problem
Resolution:                |   Keywords:
---------------------------+--------------------------------

Comment (by James E. King, III):

 #9360 also details the following, which I verified:

 {{{
     // https://svn.boost.org/trac10/ticket/9360
     unsigned char c = 0x55;
     s = (boost::format("0x%02X") % c).str();
     BOOST_CHECK_EQUAL(std::string("0x55"), s);

 Running 1 test case...
 format_test3.cpp(134): error: in "test_main_caller(_argc,_argv_)": check
 std::string("0x55") == s has failed [0x55 != 0x0U]
 }}}

 If you change the type of c to an unsigned short, or unsigned int, then
 the check passes, so it is specific to char handling, just as the original
 report here.

-- 
Ticket URL: <https://svn.boost.org/trac10/boost/ticket/4658#comment:2>
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