<regex>: Clean up parsing logic for quantifiers - #5253

<regex>: Clean up parsing logic for quantifiers#5253

Stephan T. Lavavej (StephanTLavavej) merged 6 commits into

microsoft:mainmicrosoft/STL:mainfrom

muellerj2:regex-cleanup-quantifier-parsingmuellerj2/STL:regex-cleanup-quantifier-parsingCopy head branch name to clipboard