dag

package
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 Go to latest Published: Mar 31, 2026 License: Apache-2.0 Imports: 2 Imported by: 0

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Types

type CycleError 

type CycleError struct {
	Nodes []int
}

CycleError indicates a cycle was detected in the DAG.

func (*CycleError) Error 

func (e *CycleError) Error() string

type DAG 

type DAG struct {
	// contains filtered or unexported fields
}

DAG represents a directed acyclic graph of tasks.

func New 

func New() *DAG

New creates an empty DAG.

func (*DAG) AddEdge 

func (d *DAG) AddEdge(from, to int)

AddEdge adds a dependency: `from` depends on `to`.

func (*DAG) AddNode 

func (d *DAG) AddNode(id int)

AddNode adds a node to the graph.

func (*DAG) Tiers 

func (d *DAG) Tiers() ([][]int, error)

Tiers returns nodes grouped into execution tiers using Kahn's algorithm. Tier 0 = nodes with no dependencies, Tier N+1 = nodes whose deps are all in tiers <= N. Returns an error if the graph contains a cycle.

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