auto r = replaceAll!((C)
				{
					return "X";
				}
				)(s, regex(`Y`));

Error: static variable `thompsonFactory` cannot be read at compile time

This is when the result is tried to be determined at compile time, e.g., assigning it to an enum even though s is known at compile time.

Have you tried ctRegex?

On Friday, 4 October 2019 at 10:07:40 UTC, kinke wrote:
> Have you tried ctRegex?

Yes, just another error about something else that I don't remember.

On Thursday, 3 October 2019 at 23:47:17 UTC, Brett wrote:
> Error: static variable `thompsonFactory` cannot be read at compile time

std.regex isn't ctfe compatible, alas.

even the ctRegex doesn't work at ctfe; it *compiles* the regex at compile time, but it is not capable of actually *running* it at compile time.

(the regular regex is compiled and run at runtime)