NAME

Build::Hopen::G - Namespace for graph-related items in hopen

SYNOPSIS

Everything graph-related in hopen lives under Build::Hopen::G. This includes nodes, edges, and graphs (specifically, directed acyclic graphs, DAGs).

Classes are (all under Build::Hopen::G):

Entity - something in the graph
    Link - connection between Nodes
    Node - abstract graph node
        Op - abstract operation
            Goal - a node that just gives a name to a set of operations
            PassthroughOp - no-op concrete operation
            DAG - the graph

ELEMENTS

Build::Hopen::G::Op

An operation. Operations should, generally speaking, invoke a generator routine (Build::Hopen::Gen) based on their inputs. Operations should output values representing the generator action they took.

TODO Should operations pass through all inputs they don't use or transform? I am inclined to think they should, but this needs testing.

Build::Hopen::G::Link

A connection between operations. Edges should, generally speaking, not invoke generator routines. Instead, they should transform their inputs to outputs, possibly with reference to the environment or (if necessary) the identity (but not details) of the generator in use.

Build::Hopen::G::DAG

A graph of operations and edges. Every relationship between operations and edges is expressed in a DAG. A DAG has zero or more goals (Build::Hopen::G::Goal) that represent named activities expressed in the DAG.