Adapter::Reslice: Alternative resolution of complex summation #2785
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Uses an alternative design to f97d3ca / #2768 for supporting complex numbers in the reslice adapter. Specifically in determining the type to use during summation, f97d3ca chooses complex double if the type is not arithmetic, which could hypothetically lead to unexpected behaviour with unexpected template types. This alternative instead utilises the pre-existing is_complex<> SFINAE capability.
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@jdtournier: This part of #2768 struck me as odd:
While it might result in appropriate resolution for template types currently compiled, it would attempt to use
cdoublefor any unexpected type. There's already astruct MR::is_complex<>, which makes more sense to me; its use makes the code intention far more clear IMO.