Predicate basicOrCustomNullGuard

Gets an expression that directly tests whether a given expression, e, is null or not.

If result evaluates to branch, then e is guaranteed to be null if isnull is true, and non-null if isnull is false.

Import path


                                import semmle.code.java.dataflow.NullGuards


                            
                                
                                    Expr
                                
                                 
                            
                            
                                basicOrCustomNullGuard
                            
                            
                                (
                                
                                    
                                        Expr
                                    
                                     
                                    e
                                
                                , 
                                
                                    
                                        boolean
                                    
                                     
                                    branch
                                
                                , 
                                
                                    
                                        boolean
                                    
                                     
                                    isnull
                                
                                )