Package org.codehaus.groovy.control

Class PlaceholderVisitor

java.lang.Object

org.codehaus.groovy.ast.CodeVisitorSupport

org.codehaus.groovy.ast.ClassCodeVisitorSupport

org.codehaus.groovy.control.PlaceholderVisitor

All Implemented Interfaces:

GroovyClassVisitor, GroovyCodeVisitor, ErrorCollecting

public class PlaceholderVisitor
extends ClassCodeVisitorSupport

Marks repeated underscore placeholders used in tuple and closure parameters.

Constructor Summary

Constructors

Constructor	Description
PlaceholderVisitor(CompilationUnit compilationUnit, SourceUnit source)	Creates a visitor for placeholder analysis.

Method Summary

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

Methods inherited from class org.codehaus.groovy.ast.ClassCodeVisitorSupport

addError, visitAnnotation, visitAnnotations, visitAnnotations, visitAssertStatement, visitBlockStatement, visitBreakStatement, visitCaseStatement, visitCatchStatement, visitClass, visitClassCodeContainer, visitConstructor, visitConstructorOrMethod, visitContinueStatement, visitDoWhileLoop, visitExpressionStatement, visitField, visitForLoop, visitIfElse, visitImports, visitMethod, visitObjectInitializerStatements, visitPackage, visitProperty, visitReturnStatement, visitStatement, visitStatementAnnotations, visitSwitch, visitSynchronizedStatement, visitThrowStatement, visitTryCatchFinally, visitWhileLoop

Methods inherited from class org.codehaus.groovy.ast.CodeVisitorSupport

afterSwitchCaseStatementsVisited, afterSwitchConditionExpressionVisited, visitArgumentlistExpression, visitArrayExpression, visitAttributeExpression, visitBinaryExpression, visitBitwiseNegationExpression, visitBooleanExpression, visitBytecodeExpression, visitCastExpression, visitClassExpression, visitClosureListExpression, visitConstantExpression, visitConstructorCallExpression, visitEmptyStatement, visitFieldExpression, visitGStringExpression, visitLambdaExpression, visitListExpression, visitMapEntryExpression, visitMapExpression, visitMethodCallExpression, visitMethodPointerExpression, visitMethodReferenceExpression, visitNotExpression, visitPostfixExpression, visitPrefixExpression, visitPropertyExpression, visitRangeExpression, visitShortTernaryExpression, visitSpreadExpression, visitSpreadMapExpression, visitStaticMethodCallExpression, visitTernaryExpression, visitTupleExpression, visitUnaryMinusExpression, visitUnaryPlusExpression, visitVariableExpression

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.codehaus.groovy.ast.GroovyCodeVisitor

visit, visit, visitEmptyExpression, visitListOfExpressions

Constructor Details

PlaceholderVisitor

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 Details

getSourceUnit

protected SourceUnit getSourceUnit()

Returns the source unit currently being visited.

Specified by:

getSourceUnit in class ClassCodeVisitorSupport

Returns:

the active source unit

visitDeclarationExpression

public void visitDeclarationExpression(DeclarationExpression expression)

Visit the declaration marking underscore-named variables in multi-assignments as placeholders

Specified by:

visitDeclarationExpression in interface GroovyCodeVisitor

Overrides:

visitDeclarationExpression in class ClassCodeVisitorSupport

Parameters:

expression - the expression to check

visitClosureExpression

public void visitClosureExpression(ClosureExpression expression)

Visit the Closure (or Lambda) marking underscore-named parameters as placeholders

Specified by:

visitClosureExpression in interface GroovyCodeVisitor

Overrides:

visitClosureExpression in class ClassCodeVisitorSupport

Parameters:

expression - the expression to check

isPlaceholder

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