[Development] What's the status of a moved-from object?

Thiago Macieira thiago.macieira at intel.com
Mon May 20 17:17:42 CEST 2019


On Monday, 20 May 2019 06:56:56 PDT Lars Knoll wrote:
> I actually think we should consider getting rid of shared_null and instead
> have d == nullptr as the null/default constructed state of the object. Yes,
> that means we need to check for d == nullptr in member functions, but I
> don’t think the overhead is a problem, as d will have to be loaded into a
> register in any case.

It does introduce a compare-and-branch that wouldn't otherwise be there, but 
the cost is minimal compared to what most API would be doing, indeed.

-- 
Thiago Macieira - thiago.macieira (AT) intel.com
  Software Architect - Intel System Software Products





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