Lazy Range of Graph Links

[Nordlöw via Digitalmars-d-learn]

In my knowledge hypergraph I currently have a

struct Path
{
     Node start;
     Step[] steps;
}

struct Step
{
     Fact fact;
     Node node;
}

where Node and Fact a reference types (class).

I now want to implement

auto byLink(Path path);

so that it returns a lazy range of Links where

struct Link
{
     Node source;
     Fact fact;
     Node destination;
}

In other Words, if I have a Path instance describing

N1 >=F1=> N2 >=F2=> N3

where

start: F1

and

steps: [(F1, N2), (F2, N3)]

I want byLink to return

[(N1, F1, N2), (N2, F2, N3)]

How do accomplish this?

I'm guessing std.range.zip should play a role here.