Re: Lazy Range of Graph Links

[Andrea Fontana via Digitalmars-d-learn]

On Tuesday, 16 February 2016 at 08:04:29 UTC, Nordlöw wrote:

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.

Something like this:

http://dpaste.dzfl.pl/de73cb4e7ac0

?