[Issue 9989] destructor triggers creation of opAssign for structs

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=9989


Walter Bright <bugzilla at digitalmars.com> changed:

           What    |Removed                     |Added
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             Status|NEW                         |RESOLVED
                 CC|                            |bugzilla at digitalmars.com
         Resolution|                            |INVALID


--- Comment #2 from Walter Bright <bugzilla at digitalmars.com> 2013-04-26 00:50:15 PDT ---
The reason an opAssign is generated if a destructor is present is because
assignment can no longer just copy over the data. The destructor must be run,
and the generated opAssign ensures that. The generated opAssign looks like:

  S tmp = this;   // bit copy
  this = s;       // bit copy
  tmp.dtor();

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