Re: [Boost-bugs] [Boost C++ Libraries] #7493: compile fail on intel-linux-12.1.3.0x because of bug on explicit bool conversion

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #7493: compile fail on intel-linux-12.1.3.0x because of bug on explicit bool conversion
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2012-10-10 22:44:44

#7493: compile fail on intel-linux-12.1.3.0x because of bug on explicit bool
conversion
---------------------------+------------------------------------------------
  Reporter:  viboes        |       Owner:  viboes  
      Type:  Bugs          |      Status:  assigned
 Milestone:  Boost 1.52.0  |   Component:  chrono  
   Version:  Boost 1.51.0  |    Severity:  Problem 
Resolution:                |    Keywords:          
---------------------------+------------------------------------------------
Changes (by viboes):

  * status:  new => assigned


Old description:

> The following code fail to compile with intel-linux-12.1.3.0x
>

> {{{
>           typename std::basic_ostream<CharT, Traits>::sentry opfx(os);
>           if (bool(opfx))
>           {
> }}}
>
> with the message
>
> {{{
> ../../../boost/chrono/io/duration_io.hpp(130): error: expression must
> have bool type (or be convertible to bool)
>             if (opfx)
> }}}
>
> even if sentry defines an explicit bool conversion.
>
> A workaround to this issue is needed.

New description:

 The following code fail to compile with intel-linux-12.1.3.0x


 {{{
           typename std::basic_ostream<CharT, Traits>::sentry opfx(os);
           if (opfx)
           {
 }}}

 with the message

 {{{
 ../../../boost/chrono/io/duration_io.hpp(130): error: expression must have
 bool type (or be convertible to bool)
             if (opfx)
 }}}

 even if sentry defines an explicit bool conversion.

 A workaround to this issue is needed.

--
Comment:
 It is enough to do the explicit conversion


 {{{
           typename std::basic_ostream<CharT, Traits>::sentry opfx(os);
           if (bool(opfx))
           {
 }}}
-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/7493#comment:1>
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