[github/fretlink/terraform-provider-statuscake.git] / vendor / github.com / hashicorp / terraform / dag / edge.go

package dag

import (
	"fmt"
)

// Edge represents an edge in the graph, with a source and target vertex.
type Edge interface {
	Source() Vertex
	Target() Vertex

	Hashable
}

// BasicEdge returns an Edge implementation that simply tracks the source
// and target given as-is.
func BasicEdge(source, target Vertex) Edge {
	return &basicEdge{S: source, T: target}
}

// basicEdge is a basic implementation of Edge that has the source and
// target vertex.
type basicEdge struct {
	S, T Vertex
}

func (e *basicEdge) Hashcode() interface{} {
	return fmt.Sprintf("%p-%p", e.S, e.T)
}

func (e *basicEdge) Source() Vertex {
	return e.S
}

func (e *basicEdge) Target() Vertex {
	return e.T
}
Commit	Line	Data
bae9f6d2 JC	1	package dag
	2
	3	import (
	4	"fmt"
	5	)
	6
	7	// Edge represents an edge in the graph, with a source and target vertex.
	8	type Edge interface {
	9	Source() Vertex
	10	Target() Vertex
	11
	12	Hashable
	13	}
	14
	15	// BasicEdge returns an Edge implementation that simply tracks the source
	16	// and target given as-is.
	17	func BasicEdge(source, target Vertex) Edge {
	18	return &basicEdge{S: source, T: target}
	19	}
	20
	21	// basicEdge is a basic implementation of Edge that has the source and
	22	// target vertex.
	23	type basicEdge struct {
	24	S, T Vertex
	25	}
	26
	27	func (e *basicEdge) Hashcode() interface{} {
	28	return fmt.Sprintf("%p-%p", e.S, e.T)
	29	}
	30
	31	func (e *basicEdge) Source() Vertex {
	32	return e.S
	33	}
	34
	35	func (e *basicEdge) Target() Vertex {
	36	return e.T
	37	}