Whichever syntax highlighter they're using doesn't handle decent chunks of more modern C++ syntax (trailing return types, lambda definitions). Honestly not all

Whichever syntax highlighter they're using doesn't handle decent chunks of more modern C++ syntax (trailing return types, lambda definitions). Honestly not all that surprised given it refers to C++ as "C and C++"... The elsewise mentioned https://carbon.now.sh/ https://carbon.now.sh/ seems to handle this just fine.