Dependent Directed Interface

[slibkind]

Added a new interface DirectedDependentInterface{T} which has three components: input_ports, output_ports, and dependency. dependency represents the dependency relationships between output ports and input ports.

To compose machines with this interface, we must ensure that there is acyclic wiring pattern between equivalence classes of ports related by dependency.

[slibkind]

Before merging:

• Currently dependency is represented by a span representing the relationship between ports. The first foot represents the input ports and the second foot represents the output ports. Consider a different representation (as a sparse matrix or as a list of pairs). If keeping this then verify the size of the feet of the span.
• Improve the induced_dependency function
• allow for passing wires

[slibkind]

Before merging:

• Currently dependency is represented by a span representing the relationship between ports. The first foot represents the input ports and the second foot represents the output ports. Consider a different representation (as a sparse matrix or as a list of pairs). If keeping this then verify the size of the feet of the span.
• Improve the induced_dependency function
• allow for passing wires

Moved to Issue #104