Struct std::hash< lsst::jointcal::CcdImageKey >¶
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template<>
structhash
<lsst::jointcal::CcdImageKey> Hash a ccdImage by its visit and ccd IDs.
ccdId and visitId are both 32-bit ints, hash() returns a size_t, so put the ccdId in the most-significant-bit, and the visitId in the least for a simple, unique, hash per ccdImage.