How can you read and understand the source of *naryFun in functional.d?

[bearophile]

Tom:

> The functions unaryFun and binaryFun. Is there a way I can read them and
> understand them easily? or maybe I missed something?

If you learn D well, you will be able to read them. But even if you know D they aren't easy to read. It's not easy stuff, that's standard-library-grade material :-)

Bye,
bearophile