Member predicate Expr :: hasChild

Holds if e is the nth child of this expression.

                            
                                
                                    predicate
                                
                                 
                            
                            
                                hasChild
                            
                            
                                (
                                
                                    
                                        Expr
                                    
                                     
                                    e
                                
                                , 
                                
                                    
                                        int
                                    
                                     
                                    n
                                
                                )