Re: [Boost-bugs] [Boost C++ Libraries] #5282: Test fixtures do not support virtual inheritance

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #5282: Test fixtures do not support virtual inheritance
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2011-11-09 22:20:31

#5282: Test fixtures do not support virtual inheritance
--------------------------------------+-------------------------------------
  Reporter:  tye.zdrojewski@…         |       Owner:  rogeeff
      Type:  Feature Requests         |      Status:  new    
 Milestone:  To Be Determined         |   Component:  test   
   Version:  Boost 1.45.0             |    Severity:  Problem
Resolution:                           |    Keywords:         
--------------------------------------+-------------------------------------

Comment (by Tye Z. <tye.zdrojewski@…>):

 Sorry, I forgot to add that {{{TestMe}}} extends another class:
 > {{{
 > class TestMe : public TestMeParent
 > {
 > protected:
 >    bool protectedValue = 0;
 >    int protectedMethod(int arg) { ... }
 >    void someProtectedBehavior() { ... }
 > }
 > }}}

 ...which is fine. But if the inheritance is '''virtual''', and
 {{{TestMeParent}}} does not have a default constructor, then its
 constructor must be specified by every subclass at any level:

 {{{
 class TestMeParent
 {
 public:
    TestMeParent(int initValue) { ... }
 }

 class TestMe : public virtual TestMeParent
 {
 public:
    TestMe() :
       TestMeParent(678) // initializer required at every inheritance level
    {
       ...
    }
 }

 }}}

 This breaks my fixture arrangement, because the fixture is subclassed
 again by the fixture macros.

 Hopefully I explained it clearly enough! :)

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/5282#comment:3>
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