Flow or dataflow programming is very interesting and powerful. I think some similar concepts are streams and channels which both have modules for Nim: [http://nim-lang.org/docs/channels.html](http://forum.nim-lang.org///nim-lang.org/docs/channels.html) [http://nim-lang.org/docs/streams.html](http://forum.nim-lang.org///nim-lang.org/docs/streams.html)
You can also think of flow as a more general abstraction for function composition. If you want to go that route, look through the Nim manual and documentation about string templating, and then metaprogramming with macros, the the way the parser works. Here someone has a stream implementation in Nim with pipes [https://github.com/zielmicha/reactor.nim/blob/master/reactor/async/stream.nim](https://github.com/zielmicha/reactor.nim/blob/master/reactor/async/stream.nim) Here is a workflow engine (related to flow programming and business process management) in C++ [https://github.com/kluthen/libworkflow](https://github.com/kluthen/libworkflow) which could be either integrated with a Nim program or have the code converted. Here is a list of workflow engines [https://github.com/pditommaso/awesome-pipeline](https://github.com/pditommaso/awesome-pipeline). Some of those written in python might not be hard to convert to Nim or interact with. Here is a web-based example of NoFlo which is JavaScript based (BTW Nim can also compile to JavaScript in addition to C and C++): [http://app.flowhub.io/#example/04847249319d2326fa92](http://forum.nim-lang.org///app.flowhub.io/#example/04847249319d2326fa92) Channels are an intrinsic part of the Go programming language: [https://gobyexample.com/channels](https://gobyexample.com/channels) If you are not already a programmer then you may have a long journey to get to an implementation. [https://zapier.com](https://zapier.com)/ is along the same lines but oriented towards business users.
