<regex>: Speed up searches for regexes that start with assertions - #5576

<regex>: Speed up searches for regexes that start with assertions#5576

Stephan T. Lavavej (StephanTLavavej) merged 2 commits into

microsoft:mainmicrosoft/STL:mainfrom

muellerj2:regex-speedup-assertion-searchesmuellerj2/STL:regex-speedup-assertion-searchesCopy head branch name to clipboard