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70eebe3521
This is part of a general effort to move all of Terraform's non-library package surface under internal in order to reinforce that these are for internal use within Terraform only. If you were previously importing packages under this prefix into an external codebase, you could pin to an earlier release tag as an interim solution until you've make a plan to achieve the same functionality some other way.
38 lines
687 B
Go
38 lines
687 B
Go
package dag
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import (
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"fmt"
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)
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// Edge represents an edge in the graph, with a source and target vertex.
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type Edge interface {
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Source() Vertex
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Target() Vertex
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Hashable
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}
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// BasicEdge returns an Edge implementation that simply tracks the source
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// and target given as-is.
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func BasicEdge(source, target Vertex) Edge {
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return &basicEdge{S: source, T: target}
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}
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// basicEdge is a basic implementation of Edge that has the source and
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// target vertex.
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type basicEdge struct {
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S, T Vertex
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}
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func (e *basicEdge) Hashcode() interface{} {
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return fmt.Sprintf("%p-%p", e.S, e.T)
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}
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func (e *basicEdge) Source() Vertex {
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return e.S
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}
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func (e *basicEdge) Target() Vertex {
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return e.T
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}
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