ElvisOperatorExpression (groovy 2.5.23 API)

org.codehaus.groovy.ast.expr.ElvisOperatorExpression

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

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

Even if x is no atomic expression, x will be evaluated only once. Example:

 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

Since:: 1.5

Constructor Summary

Constructors
Constructor and description
`ElvisOperatorExpression (Expression base, Expression falseExpression)`

Methods Summary

Methods
Type Params	Return Type	Name and description
	`Expression`	`transformExpression(ExpressionTransformer transformer)`
	`void`	`visit(GroovyCodeVisitor visitor)`

Inherited Methods Summary

Inherited Methods
Methods inherited from class	Name
`class TernaryExpression`	`getBooleanExpression, getFalseExpression, getText, getTrueExpression, getType, toString, transformExpression, visit`
`class Expression`	`getType, setType, transformExpression, transformExpressions, transformExpressions`
`class AnnotatedNode`	`addAnnotation, addAnnotations, getAnnotations, getAnnotations, getDeclaringClass, hasNoRealSourcePosition, isSynthetic, setDeclaringClass, setHasNoRealSourcePosition, setSynthetic`
`class ASTNode`	`copyNodeMetaData, getColumnNumber, getLastColumnNumber, getLastLineNumber, getLineNumber, getMetaDataMap, getNodeMetaData, getNodeMetaData, getText, putNodeMetaData, removeNodeMetaData, setColumnNumber, setLastColumnNumber, setLastLineNumber, setLineNumber, setNodeMetaData, setSourcePosition, visit`

- Constructor Detail
  - public ElvisOperatorExpression(Expression base, Expression falseExpression)
- Method Detail
  - public Expression transformExpression(ExpressionTransformer transformer)
  - public void visit(GroovyCodeVisitor visitor)

Summary:
Constructor
Method

| Detail:
Constructor
Method

[Java] Class ElvisOperatorExpression

Constructor Summary

Methods Summary

Inherited Methods Summary

Constructor Detail

public ElvisOperatorExpression(Expression base, Expression falseExpression)

Method Detail

public Expression transformExpression(ExpressionTransformer transformer)

public void visit(GroovyCodeVisitor visitor)