<mdspan>: Check preconditions of mdspan::operator[] clarified by LWG-3974 - #4214

<mdspan>: Check preconditions of mdspan::operator[] clarified by LWG-3974#4214

Stephan T. Lavavej (StephanTLavavej) merged 2 commits into

microsoft:mainmicrosoft/STL:mainfrom

frederick-vs-ja:lwg-3974frederick-vs-ja/STL:lwg-3974Copy head branch name to clipboard