http://d.puremagic.com/issues/show_bug.cgi?id=7517

           Summary: Interface contracts broken
           Product: D
           Version: D2
          Platform: x86
        OS/Version: Windows
            Status: NEW
          Severity: major
          Priority: P2
         Component: DMD
        AssignedTo: nobody@puremagic.com
        ReportedBy: renezwanenburg@gmail.com


--- Comment #0 from Rene Zwanenburg <renezwanenburg@gmail.com> 2012-02-16 06:18:13 PST ---
interface I {

  void enable()
  in  { assert(!enabled); }
  out { assert( enabled); }

  void disable()
  in  { assert( enabled); }
  out { assert(!enabled); }

  @property bool enabled() const;

}

class C : I {
  void enable() {
    _enabled = true;
  }

  void disable() {
    _enabled = false;
  }

  @property bool enabled() const {
    return _enabled;
  }

  bool _enabled;
}

void foo() {
  I i = new C;
  i.enable();
}


enable's in contract is not being called. After setting _enabled to true an exception is thrown saying C does not implement opCmp().

When removing the out contract from the interface, or the disable() function from the interface and implementation (even though it's never being used anywhere in the application), the code will run without exceptions but the contracts will still not be called.

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http://d.puremagic.com/issues/show_bug.cgi?id=7517


Stewart Gordon <smjg@iname.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |smjg@iname.com
         Depends on|                            |6856


--- Comment #1 from Stewart Gordon <smjg@iname.com> 2012-03-05 02:41:20 PST ---
This is closely related to, if not a duplicate of, issue 6856.

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