Class PrintVisitor

java.lang.Object

com.oracle.js.parser.ir.visitor.NodeVisitor<LexicalContext>

com.oracle.truffle.js.parser.internal.ir.debug.PrintVisitor

public final class PrintVisitor
extends NodeVisitor<LexicalContext>

Print out the AST as human readable source code. This works both on lowered and unlowered ASTs see the flags --print-parse and --print-lower-parse

Field Summary

Fields inherited from class NodeVisitor

lc

Constructor Summary

Constructors

Constructor	Description
PrintVisitor()	Constructor.
PrintVisitor(boolean printLineNumbers, boolean printTypes)	Constructor.
PrintVisitor(Node root)	Constructor.
PrintVisitor(Node root, boolean printLineNumbers, boolean printTypes)	Constructor.

Method Summary

Modifier and Type	Method	Description
boolean	enterBinaryNode(BinaryNode binaryNode)	Callback for entering a BinaryNode
boolean	enterBlock(Block block)	Callback for entering a Block
boolean	enterBlockStatement(BlockStatement statement)	Callback for entering a BlockStatement
boolean	enterBreakNode(BreakNode node)	Callback for entering a BreakNode
boolean	enterContinueNode(ContinueNode node)	Callback for entering a ContinueNode
boolean	enterDefault(Node node)	Override this method to do a double inheritance pattern, e.g.
boolean	enterExpressionStatement(ExpressionStatement expressionStatement)	Callback for entering an ExpressionStatement
boolean	enterForNode(ForNode forNode)	Callback for entering a ForNode
boolean	enterFunctionNode(FunctionNode functionNode)	Callback for entering a FunctionNode
boolean	enterIdentNode(IdentNode identNode)	Callback for entering an IdentNode
boolean	enterIfNode(IfNode ifNode)	Callback for entering an IfNode
boolean	enterJoinPredecessorExpression(JoinPredecessorExpression expr)	Callback for entering a JoinPredecessorExpression.
boolean	enterLabelNode(LabelNode labeledNode)	Callback for entering a LabelNode
boolean	enterSwitchNode(SwitchNode switchNode)	Callback for entering a SwitchNode
boolean	enterThrowNode(ThrowNode node)	Callback for entering a ThrowNode
boolean	enterTryNode(TryNode tryNode)	Callback for entering a TryNode
boolean	enterUnaryNode(UnaryNode unaryNode)	Callback for entering a UnaryNode
boolean	enterVarNode(VarNode varNode)	Callback for entering a VarNode
boolean	enterWhileNode(WhileNode whileNode)	Callback for entering a WhileNode
boolean	enterWithNode(WithNode withNode)	Callback for entering a WithNode
String	toString()

Methods inherited from class NodeVisitor

enterAccessNode, enterBlockExpression, enterCallNode, enterCaseNode, enterCatchNode, enterClassElement, enterClassNode, enterDebuggerNode, enterEmptyNode, enterErrorNode, enterExportNode, enterExportSpecifierNode, enterImportClauseNode, enterImportNode, enterImportSpecifierNode, enterIndexNode, enterLiteralNode, enterNamedExportsNode, enterNamedImportsNode, enterNameSpaceImportNode, enterObjectNode, enterParameterNode, enterPropertyNode, enterReturnNode, enterTemplateLiteralNode, enterTernaryNode, getLexicalContext, leaveAccessNode, leaveBinaryNode, leaveBlock, leaveBlockExpression, leaveBlockStatement, leaveBreakNode, leaveCallNode, leaveCaseNode, leaveCatchNode, leaveClassElement, leaveClassNode, leaveContinueNode, leaveDebuggerNode, leaveDefault, leaveEmptyNode, leaveErrorNode, leaveExportNode, leaveExportSpecifierNode, leaveExpressionStatement, leaveForNode, leaveFunctionNode, leaveIdentNode, leaveIfNode, leaveImportClauseNode, leaveImportNode, leaveImportSpecifierNode, leaveIndexNode, leaveJoinPredecessorExpression, leaveLabelNode, leaveLiteralNode, leaveNamedExportsNode, leaveNamedImportsNode, leaveNameSpaceImportNode, leaveObjectNode, leaveParameterNode, leavePropertyNode, leaveReturnNode, leaveSwitchNode, leaveTemplateLiteralNode, leaveTernaryNode, leaveThrowNode, leaveTryNode, leaveUnaryNode, leaveVarNode, leaveWhileNode, leaveWithNode

Methods inherited from class Object

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

Constructor Details

PrintVisitor

public PrintVisitor()

Constructor.

PrintVisitor

public PrintVisitor(boolean printLineNumbers,
 boolean printTypes)

Constructor.

Parameters:

printLineNumbers - should line number nodes be included in the output?

printTypes - should we print optimistic and inferred types?

PrintVisitor

public PrintVisitor(Node root)

Constructor.

Parameters:

root - a node from which to start printing code

PrintVisitor

public PrintVisitor(Node root,
 boolean printLineNumbers,
 boolean printTypes)

Constructor.

Parameters:

root - a node from which to start printing code

printLineNumbers - should line numbers nodes be included in the output?

printTypes - should we print optimistic and inferred types?

Method Details

toString

public String toString()

Overrides:

toString in class Object

enterDefault

public boolean enterDefault(Node node)

Description copied from class: NodeVisitor

Override this method to do a double inheritance pattern, e.g. avoid using

if (x instanceof NodeTypeA) {
   ...
} else if (x instanceof NodeTypeB) {
   ...
} else {
   ...
}

Use a NodeVisitor instead, and this method contents forms the else case.

Overrides:

enterDefault in class NodeVisitor<LexicalContext>

Parameters:

node - the node to visit

Returns:

true if traversal should continue and node children be traversed, false otherwise

See Also:

• NodeVisitor.leaveDefault(Node)

enterContinueNode

public boolean enterContinueNode(ContinueNode node)

Description copied from class: NodeVisitor

Callback for entering a ContinueNode

Overrides:

enterContinueNode in class NodeVisitor<LexicalContext>

Parameters:

node - the node

Returns:

true if traversal should continue and node children be traversed, false otherwise

enterBreakNode

public boolean enterBreakNode(BreakNode node)

Description copied from class: NodeVisitor

Callback for entering a BreakNode

Overrides:

enterBreakNode in class NodeVisitor<LexicalContext>

Parameters:

node - the node

Returns:

true if traversal should continue and node children be traversed, false otherwise

enterThrowNode

public boolean enterThrowNode(ThrowNode node)

Description copied from class: NodeVisitor

Callback for entering a ThrowNode

Overrides:

enterThrowNode in class NodeVisitor<LexicalContext>

Parameters:

node - the node

Returns:

true if traversal should continue and node children be traversed, false otherwise

enterBlock

public boolean enterBlock(Block block)

Description copied from class: NodeVisitor

Callback for entering a Block

Overrides:

enterBlock in class NodeVisitor<LexicalContext>

Parameters:

block - the node

Returns:

true if traversal should continue and node children be traversed, false otherwise

enterBlockStatement

public boolean enterBlockStatement(BlockStatement statement)

Description copied from class: NodeVisitor

Callback for entering a BlockStatement

Overrides:

enterBlockStatement in class NodeVisitor<LexicalContext>

Parameters:

statement - the node

Returns:

true if traversal should continue and node children be traversed, false otherwise

enterBinaryNode

public boolean enterBinaryNode(BinaryNode binaryNode)

Description copied from class: NodeVisitor

Callback for entering a BinaryNode

Overrides:

enterBinaryNode in class NodeVisitor<LexicalContext>

Parameters:

binaryNode - the node

Returns:

processed node

enterJoinPredecessorExpression

public boolean enterJoinPredecessorExpression(JoinPredecessorExpression expr)

Description copied from class: NodeVisitor

Callback for entering a JoinPredecessorExpression.

Overrides:

enterJoinPredecessorExpression in class NodeVisitor<LexicalContext>

Parameters:

expr - the join predecessor expression

Returns:

true if traversal should continue and node children be traversed, false otherwise

enterIdentNode

public boolean enterIdentNode(IdentNode identNode)

Description copied from class: NodeVisitor

Callback for entering an IdentNode

Overrides:

enterIdentNode in class NodeVisitor<LexicalContext>

Parameters:

identNode - the node

Returns:

true if traversal should continue and node children be traversed, false otherwise

enterUnaryNode

public boolean enterUnaryNode(UnaryNode unaryNode)

Description copied from class: NodeVisitor

Callback for entering a UnaryNode

Overrides:

enterUnaryNode in class NodeVisitor<LexicalContext>

Parameters:

unaryNode - the node

Returns:

true if traversal should continue and node children be traversed, false otherwise

enterExpressionStatement

public boolean enterExpressionStatement(ExpressionStatement expressionStatement)

Description copied from class: NodeVisitor

Callback for entering an ExpressionStatement

Overrides:

enterExpressionStatement in class NodeVisitor<LexicalContext>

Parameters:

expressionStatement - the node

Returns:

true if traversal should continue and node children be traversed, false otherwise

enterForNode

public boolean enterForNode(ForNode forNode)

Description copied from class: NodeVisitor

Callback for entering a ForNode

Overrides:

enterForNode in class NodeVisitor<LexicalContext>

Parameters:

forNode - the node

Returns:

true if traversal should continue and node children be traversed, false otherwise

enterFunctionNode

public boolean enterFunctionNode(FunctionNode functionNode)

Description copied from class: NodeVisitor

Callback for entering a FunctionNode

Overrides:

enterFunctionNode in class NodeVisitor<LexicalContext>

Parameters:

functionNode - the node

Returns:

true if traversal should continue and node children be traversed, false otherwise

enterIfNode

public boolean enterIfNode(IfNode ifNode)

Description copied from class: NodeVisitor

Callback for entering an IfNode

Overrides:

enterIfNode in class NodeVisitor<LexicalContext>

Parameters:

ifNode - the node

Returns:

true if traversal should continue and node children be traversed, false otherwise

enterLabelNode

public boolean enterLabelNode(LabelNode labeledNode)

Description copied from class: NodeVisitor

Callback for entering a LabelNode

Overrides:

enterLabelNode in class NodeVisitor<LexicalContext>

Parameters:

labeledNode - the node

Returns:

true if traversal should continue and node children be traversed, false otherwise

enterSwitchNode

public boolean enterSwitchNode(SwitchNode switchNode)

Description copied from class: NodeVisitor

Callback for entering a SwitchNode

Overrides:

enterSwitchNode in class NodeVisitor<LexicalContext>

Parameters:

switchNode - the node

Returns:

true if traversal should continue and node children be traversed, false otherwise

enterTryNode

public boolean enterTryNode(TryNode tryNode)

Description copied from class: NodeVisitor

Callback for entering a TryNode

Overrides:

enterTryNode in class NodeVisitor<LexicalContext>

Parameters:

tryNode - the node

Returns:

true if traversal should continue and node children be traversed, false otherwise

enterVarNode

public boolean enterVarNode(VarNode varNode)

Description copied from class: NodeVisitor

Callback for entering a VarNode

Overrides:

enterVarNode in class NodeVisitor<LexicalContext>

Parameters:

varNode - the node

Returns:

true if traversal should continue and node children be traversed, false otherwise

enterWhileNode

public boolean enterWhileNode(WhileNode whileNode)

Description copied from class: NodeVisitor

Callback for entering a WhileNode

Overrides:

enterWhileNode in class NodeVisitor<LexicalContext>

Parameters:

whileNode - the node

Returns:

true if traversal should continue and node children be traversed, false otherwise

enterWithNode

public boolean enterWithNode(WithNode withNode)

Description copied from class: NodeVisitor

Callback for entering a WithNode

Overrides:

enterWithNode in class NodeVisitor<LexicalContext>

Parameters:

withNode - the node

Returns:

true if traversal should continue and node children be traversed, false otherwise