<mdspan>: Cache fwd-prod-of-extents and rev-prod-of-extents when all extents are static - #3715

<mdspan>: Cache fwd-prod-of-extents and rev-prod-of-extents when all extents are static#3715

Stephan T. Lavavej (StephanTLavavej) merged 3 commits into

microsoft:feature/mdspan2microsoft/STL:feature/mdspan2from

JMazurkiewicz:mdspan/cache-prodsJMazurkiewicz/STL:mdspan/cache-prodsCopy head branch name to clipboard