Package com.google.javascript.jscomp

Class ControlFlowGraph<N>

java.lang.Object

com.google.javascript.jscomp.graph.Graph<N,ControlFlowGraph.Branch>

com.google.javascript.jscomp.graph.DiGraph<N,ControlFlowGraph.Branch>

com.google.javascript.jscomp.graph.LinkedDirectedGraph<N,ControlFlowGraph.Branch>

com.google.javascript.jscomp.ControlFlowGraph<N>

Type Parameters:

N - The instruction type of the control flow graph.

All Implemented Interfaces:

AdjacencyGraph<N,ControlFlowGraph.Branch>, GraphvizGraph

public class ControlFlowGraph<N>
extends LinkedDirectedGraph<N,ControlFlowGraph.Branch>

Control flow graph.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	ControlFlowGraph.AbstractCfgNodeTraversalCallback	Abstract callback to visit a control flow graph node without going into subtrees of the node that are also represented by other control flow graph nodes.
static enum	ControlFlowGraph.Branch	The edge object for the control flow graph.

Nested classes/interfaces inherited from class com.google.javascript.jscomp.graph.LinkedDirectedGraph

LinkedDirectedGraph.LinkedDiGraphEdge<N,E>, LinkedDirectedGraph.LinkedDiGraphNode<N,E>

Nested classes/interfaces inherited from class com.google.javascript.jscomp.graph.DiGraph

DiGraph.DiGraphEdge<N,E>, DiGraph.DiGraphNode<N,E>

Nested classes/interfaces inherited from class com.google.javascript.jscomp.graph.Graph

Graph.GraphEdge<N,E>

Nested classes/interfaces inherited from interface com.google.javascript.jscomp.graph.GraphvizGraph

GraphvizGraph.GraphvizEdge, GraphvizGraph.GraphvizNode

Field Summary

Fields inherited from class com.google.javascript.jscomp.graph.LinkedDirectedGraph

nodes

Method Summary

Modifier and Type	Method	Description
DiGraph.DiGraphNode<N,ControlFlowGraph.Branch>	getEntry()	Gets the entry point of the control flow graph.
DiGraph.DiGraphNode<N,ControlFlowGraph.Branch>	getImplicitReturn()	Gets the implicit return node.
Comparator<DiGraph.DiGraphNode<N,ControlFlowGraph.Branch>>	getOptionalNodeComparator(boolean isForward)	Gets a comparator for the nodes.
static boolean	isEnteringNewCfgNode(Node n)
boolean	isImplicitReturn(DiGraph.DiGraphNode<N,ControlFlowGraph.Branch> node)	Checks whether node is the implicit return.
String	toString()

Methods inherited from class com.google.javascript.jscomp.graph.LinkedDirectedGraph

connect, connect, connectIfNotConnectedInDirection, create, createNode, createWithoutAnnotations, disconnect, disconnectInDirection, getDirectedPredNodes, getDirectedPredNodes, getDirectedSuccNodes, getDirectedSuccNodes, getEdges, getEdges, getEdgesInDirection, getFirstEdge, getGraphvizEdges, getGraphvizNodes, getInEdges, getName, getNeighborNodes, getNode, getNodeCount, getNodeDegree, getNodes, getOutEdges, isConnectedInDirection, isConnectedInDirection, isConnectedInDirection, isDirected, newSubGraph

Methods inherited from class com.google.javascript.jscomp.graph.DiGraph

isConnected, isConnected

Methods inherited from class com.google.javascript.jscomp.graph.Graph

clearEdgeAnnotations, clearNodeAnnotations, connectIfNotFound, getWeight, hasNode, popEdgeAnnotations, popNodeAnnotations, pushEdgeAnnotations, pushNodeAnnotations

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Method Details

getImplicitReturn

public DiGraph.DiGraphNode<N,ControlFlowGraph.Branch> getImplicitReturn()

Gets the implicit return node.

Returns:

Return node.

getEntry

public DiGraph.DiGraphNode<N,ControlFlowGraph.Branch> getEntry()

Gets the entry point of the control flow graph. In general, this should be the beginning of the global script or beginning of a function.

Returns:

The entry point.

isImplicitReturn

public boolean isImplicitReturn(DiGraph.DiGraphNode<N,ControlFlowGraph.Branch> node)

Checks whether node is the implicit return.

Parameters:

node - Node.

Returns:

True if the node is the implicit return.

getOptionalNodeComparator

public Comparator<DiGraph.DiGraphNode<N,ControlFlowGraph.Branch>> getOptionalNodeComparator(boolean isForward)

Gets a comparator for the nodes. The default implementation returns null. See getOptionalNodeComparator(boolean).

Parameters:

isForward - Whether the comparator sorts the nodes in the direction of the flow.

Returns:

a comparator or null (in particular, if not overridden)

isEnteringNewCfgNode

public static boolean isEnteringNewCfgNode(Node n)

Returns:

True if n should be represented by a new CFG node in the control flow graph.

toString

public String toString()

Overrides:

toString in class Object