see https://hookrace.net/nim-iterutils/iterutils.html
see zero-functional/zero-functional#21
composition now works thanks to https://github.com/nim-lang/Nim/commit/c554c2a581dacbde7f85c19a066b68ca0c68da3e
see https://hookrace.net/nim-iterutils/iterutils.html
see zero-functional/zero-functional#21
composition now works thanks to https://github.com/nim-lang/Nim/commit/c554c2a581dacbde7f85c19a066b68ca0c68da3e