On 08/24/2018 01:13 PM, Andrey wrote: > This code produces an error: >> auto matches = content.matchAll(pattern); >> auto max = matches.maxElement!"a => a.back.to!uint"(); You're mixing two different notations. It's either matches.maxElement!(a => a.back.to!uint)() or matches.maxElement!"a.back.to!uint"()