You just need two try/finally blocks: Screen.Cursor:= crHourGlass; try Obj:= TSomeObject.Create; try // do something finally Obj.Free; end; finally Screen.Cursor:= crDefault; end; The guideline to follow is that you should use finally rather than except for protecting resources. As you have observed, if you attempt to do it with except then you are forced to … Read more
Finally always executes. That’s what it’s for, which means its return value gets used in your case. You’ll want to change your code so it’s more like this: function example() { var returnState = false; // initialization value is really up to the design try { returnState = true; } catch { returnState = false; … Read more
Because try-with-resources is syntactic sugar and the Java compiler doesn’t expand regular try-finally blocks in the same way. Take a look at the following code: try(FileInputStream fstream = new FileInputStream(“test”)) { fstream.read(); } When compiled and then decompiled (using IntelliJ IDEA) it looks like this: FileInputStream fstream = new FileInputStream(“test”); Throwable var2 = null; try … Read more
From the python docs: When a return, break or continue statement is executed in the try suite of a try…finally statement, the finally clause is also executed ‘on the way out.’ A continue statement is illegal in the finally clause. (The reason is a problem with the current implementation — this restriction may be lifted … Read more
When the finally block throws an exception, it will effectively hide the exception thrown from the catch block and will be the one ultimately thrown. It is therefore important to either log exceptions when caught, or make sure that the finally block does not itself throw an exception, otherwise you can get exceptions being thrown … Read more
Using a contextmanager You could use a custom contextmanager, for example: class DidWeRaise: __slots__ = (‘exception_happened’, ) # instances will take less memory def __enter__(self): return self def __exit__(self, exc_type, exc_val, exc_tb): # If no exception happened the `exc_type` is None self.exception_happened = exc_type is not None And then use that inside the try: try: … Read more
Why not look at what you actually get? Here is a simple chunk of code in C#: static void Main(string[] args) { int i = 0; try { i = 1; Console.WriteLine(i); return; } finally { Console.WriteLine(“finally.”); } } And here is the resulting IL in the debug build: .method private hidebysig static void Main(string[] … Read more
These are two different things: The catch block is only executed if an exception is thrown in the try block. The finally block is executed always after the try(-catch) block, if an exception is thrown or not. In your example you haven’t shown the third possible construct: try { // try to execute this statements… … Read more
From the Python documentation A finally clause is always executed before leaving the try statement, whether an exception has occurred or not. When an exception has occurred in the try clause and has not been handled by an except clause (or it has occurred in a except or else clause), it is re-raised after the … Read more
If any of the code in the try block can throw a checked exception, it has to appear in the throws clause of the method signature. If an unchecked exception is thrown, it’s bubbled out of the method. The finally block is always executed, whether an exception is thrown or not.