[Boost-bugs] [Boost C++ Libraries] #12973: Example in docs for optional<T&> copy constructor is wrong

Subject: [Boost-bugs] [Boost C++ Libraries] #12973: Example in docs for optional<T&> copy constructor is wrong
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2017-04-14 21:52:55

#12973: Example in docs for optional<T&> copy constructor is wrong
------------------------------+-----------------------
 Reporter:  barry.revzin@…    |      Owner:  fcacciola
     Type:  Bugs              |     Status:  new
Milestone:  To Be Determined  |  Component:  optional
  Version:  Boost 1.63.0      |   Severity:  Cosmetic
 Keywords:                    |
------------------------------+-----------------------
 In the
 [http://www.boost.org/doc/libs/1_63_0/libs/optional/doc/html/boost_optional/reference/header__boost_optional_optional_hpp_/detailed_semantics.html

 documentation for Optional] in the latest version, and many past versions,
 the example in the copy constructor for `optional<T&>` reads:

 {{{
 T v = 2 ; T& ref = v ;
 optional<T> init(ref);
 assert ( *init == v ) ;

 optional<T> init2 ( init ) ;
 assert ( *init2 == v ) ;

 v = 3 ;

 assert ( *init  == 3 ) ;
 assert ( *init2 == 3 ) ;
 }}}

 Both `init` and `init2` should be of type `optional<T&>`, not
 `optional<T>`.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/12973>
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