I want to connect several functions for signal processing. The typical case is that in a network of signal processor there are parts that are already discretized such as sampled sounds, and there are processors with no particular sample rate such as amplifiers. But when it comes to computation each processor must choose a sample rate for processing. There are also processors for converting sample rates. They divide the network into components of equal sample rate. The computation sample rate should be propagated through the network as follows: If in a component of equal sample rate some processors have the same fixed sample rate, all uncertain processors must adapt that. If some processors have different fixed sample rates this is an error. If no processor has a fixed sample rate, the user must provide one manually. To me this looks very similar to type inference. Is there some mechanism in Haskell which supports this programming structure?