org.codehaus.groovy.ast.expr
Class ElvisOperatorExpression

java.lang.Object
  org.codehaus.groovy.ast.ASTNode
      org.codehaus.groovy.ast.AnnotatedNode
          org.codehaus.groovy.ast.expr.Expression
              org.codehaus.groovy.ast.expr.TernaryExpression
                  org.codehaus.groovy.ast.expr.ElvisOperatorExpression

class ElvisOperatorExpression
extends TernaryExpression

Represents a short ternary expression x ?: y, which is equal to

 def truePart = x
 def booleanPart = truePart as boolean
 booleanPart? truePart : y
 

 class Foo { 
   def index=0 
   def getX(){ index++; return index }
 }
 def foo = new Foo()
 def result = foo.x ?: "false case" 
 assert foo.index == 1
 assert result == 1 
 
 
 
author:
Jochen Theodorou
 
since:
1.5
 
































    

    

    

    Constructor Summary
    
    
        

        

            ElvisOperatorExpression(Expression base, Expression falseExpression)
            

            

        
        
    
    
     






    

    

    

    Method Summary
    
    
        

        

            Expression
        
        

            transformExpression(ExpressionTransformer transformer)
            

            

        
        
    
        

        

            void
        
        

            visit(GroovyCodeVisitor visitor)
            

            

        
        
    
    
     

                

                Methods inherited from class TernaryExpression
                
                
getBooleanExpression, getFalseExpression, getText, getTrueExpression, getType, toString, transformExpression, visit
                
                 

                

                Methods inherited from class Expression
                
                
getType, setType, transformExpression, transformExpressions, transformExpressions
                
                 

                

                Methods inherited from class AnnotatedNode
                
                
addAnnotation, addAnnotations, getAnnotations, getAnnotations, getDeclaringClass, isSynthetic, setDeclaringClass, setSynthetic
                
                 

                

                Methods inherited from class ASTNode
                
                
getColumnNumber, getLastColumnNumber, getLastLineNumber, getLineNumber, getText, setColumnNumber, setLastColumnNumber, setLastLineNumber, setLineNumber, setSourcePosition, visit
                
                 

                

                Methods inherited from class Object
                
                
wait, wait, wait, hashCode, getClass, equals, toString, notify, notifyAll
                
                 



























    

    

    

    Constructor Detail
    
    
    
        

        ElvisOperatorExpression
        
public ElvisOperatorExpression(Expression base, Expression falseExpression)
        

        

        
        

        
        

    
     






    

    

    

    Method Detail
    
    
    
        

        transformExpression
        
public Expression transformExpression(ExpressionTransformer transformer)
        

        

        
        

        
        

    
        

        visit
        
public void visit(GroovyCodeVisitor visitor)
        

        

        
        

        
        

    
     



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