PlaceholderVisitor (Groovy 6.0.0-alpha-2)

org.codehaus.groovy.control.PlaceholderVisitor

```
public class PlaceholderVisitor
extends ClassCodeVisitorSupport
```
Marks repeated underscore placeholders used in tuple and closure parameters.

Constructor Summary

Constructors
Constructor and description
`PlaceholderVisitor(CompilationUnit compilationUnit, SourceUnit source)` Creates a visitor for placeholder analysis.

Methods Summary

Methods
Type Params	Return Type	Name and description
	`protected SourceUnit`	`getSourceUnit()` Returns the source unit currently being visited.
	`public static boolean`	`isPlaceholder(ASTNode node)` Checks whether the supplied node has been marked as a placeholder.
	`public void`	`visitClosureExpression(ClosureExpression expression)` Visit the Closure (or Lambda) marking underscore-named parameters as placeholders
	`public void`	`visitDeclarationExpression(DeclarationExpression expression)` Visit the declaration marking underscore-named variables in multi-assignments as placeholders

Inherited Methods Summary

Inherited Methods
Methods inherited from class	Name
`class ClassCodeVisitorSupport`	addError, getSourceUnit, visitAnnotation, visitAnnotations, visitAnnotations, visitAssertStatement, visitBlockStatement, visitBreakStatement, visitCaseStatement, visitCatchStatement, visitClass, visitClassCodeContainer, visitClosureExpression, visitConstructor, visitConstructorOrMethod, visitContinueStatement, visitDeclarationExpression, visitDoWhileLoop, visitExpressionStatement, visitField, visitForLoop, visitIfElse, visitImports, visitMethod, visitObjectInitializerStatements, visitPackage, visitProperty, visitReturnStatement, visitStatement, visitStatementAnnotations, visitSwitch, visitSynchronizedStatement, visitThrowStatement, visitTryCatchFinally, visitWhileLoop
`class CodeVisitorSupport`	afterSwitchCaseStatementsVisited, afterSwitchConditionExpressionVisited, visitArgumentlistExpression, visitArrayExpression, visitAssertStatement, visitAttributeExpression, visitBinaryExpression, visitBitwiseNegationExpression, visitBlockStatement, visitBooleanExpression, visitBreakStatement, visitBytecodeExpression, visitCaseStatement, visitCastExpression, visitCatchStatement, visitClassExpression, visitClosureExpression, visitClosureListExpression, visitConstantExpression, visitConstructorCallExpression, visitContinueStatement, visitDeclarationExpression, visitDoWhileLoop, visitEmptyStatement, visitExpressionStatement, visitFieldExpression, visitForLoop, visitGStringExpression, visitIfElse, visitLambdaExpression, visitListExpression, visitMapEntryExpression, visitMapExpression, visitMethodCallExpression, visitMethodPointerExpression, visitMethodReferenceExpression, visitNotExpression, visitPostfixExpression, visitPrefixExpression, visitPropertyExpression, visitRangeExpression, visitReturnStatement, visitShortTernaryExpression, visitSpreadExpression, visitSpreadMapExpression, visitStaticMethodCallExpression, visitSwitch, visitSynchronizedStatement, visitTernaryExpression, visitThrowStatement, visitTryCatchFinally, visitTupleExpression, visitUnaryMinusExpression, visitUnaryPlusExpression, visitVariableExpression, visitWhileLoop

- Constructor Detail
  - public PlaceholderVisitor(CompilationUnit compilationUnit, SourceUnit source)
    
    Creates a visitor for placeholder analysis.
    Parameters:
    compilationUnit - the owning compilation unit
    source - the source unit being visited
- Method Detail
  - protected SourceUnit getSourceUnit()
    
    Returns the source unit currently being visited.
    Returns:
    the active source unit
  - public static boolean isPlaceholder(ASTNode node)
    
    Checks whether the supplied node has been marked as a placeholder.
    Parameters:
    node - the node to inspect
    Returns:
    true if the node is a placeholder
  - public void visitClosureExpression(ClosureExpression expression)
    
    Visit the Closure (or Lambda) marking underscore-named parameters as placeholders
    Parameters:
    expression - the expression to check
  - public void visitDeclarationExpression(DeclarationExpression expression)
    
    Visit the declaration marking underscore-named variables in multi-assignments as placeholders
    Parameters:
    expression - the expression to check

Summary:
Constructor
Method

| Detail:
Constructor
Method

[Java] Class PlaceholderVisitor

Constructor Summary

Methods Summary

Inherited Methods Summary

Constructor Detail

public PlaceholderVisitor(CompilationUnit compilationUnit, SourceUnit source)

Method Detail

protected SourceUnit getSourceUnit()

public static boolean isPlaceholder(ASTNode node)

public void visitClosureExpression(ClosureExpression expression)

public void visitDeclarationExpression(DeclarationExpression expression)