Re: [Boost-bugs] [Boost C++ Libraries] #12917: string_ref not constructible from rvalue strings anymore

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #12917: string_ref not constructible from rvalue strings anymore
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2017-03-20 23:20:03

#12917: string_ref not constructible from rvalue strings anymore
-------------------------------+------------------------
  Reporter:  mgaunard          |      Owner:  marshall
      Type:  Bugs              |     Status:  new
 Milestone:  To Be Determined  |  Component:  utility
   Version:  Boost 1.64.0      |   Severity:  Regression
Resolution:                    |   Keywords:
-------------------------------+------------------------

Comment (by arvid.norberg@…):

 one example of this from my project:

 {{{
 std::string combine_path(string_view left, string_view right);
 }}}

 It used to be possible to nest these, like this:


 {{{
 auto a = combine_path(foo, combine_path(bar, b));
 }}}

 in boost-1.64 this is no longer possible, a proposed work-around is to
 introduce a {{{string_view make_sv(std::string const&)}}} function, to
 turn the temporary into an lvalue and construct the string_view from that.
 [https://github.com/arvidn/libtorrent/pull/1814]

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/12917#comment:2>
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