I believe these are the relevant quotes from JLS 14.21: An empty block that is not a switch block can complete normally iff it is reachable. A non-empty block that is not a switch block can complete normally iff the last statement in it can complete normally. The first statement in a non-empty block that … Read more
There is no try catch statement in Rust. The closest approach is the ? operator. However, you do not have to create a function and a match statement to resolve it in the end. You can define a closure in your scope and use ? operator inside the closure. Then throws are held in the … Read more
I know you’re asking about performance overhead, but you really should not use try/catch and if interchangeably. try/catch is for things that go wrong that are outside of your control and not in the normal program flow. For example, trying to write to a file and the file system is full? That situation should typically … Read more
On Windows, exceptions are supported at the operating system level. Called Structured Exception Handling (SEH), they are the rough equivalent to Unix signals. Compilers that generate code for Windows typically take advantage of this, they use the SEH infrastructure to implement C++ exceptions. In keeping with the C++ standard, the throw and catch keywords only … Read more
You have almost answered your own question. Your catch block will not catch the AssertionError that the Assert throws if it fails, because it is an Error (or, more specifically, it extends java.lang.Error). See the docs for more information on this. Your catch block only catches Throwable objects that extend java.lang.Exception If you really want … Read more
Edit The below solution catches only render errors because they are sync in nature. That is how JS works, it has nothing to do with React, which is what the OP asked about. Original post React 16 introduced Error Boundaries and the componentDidCatch lifecycle method: class ErrorBoundary extends React.Component { constructor(props) { super(props); this.state = … Read more
I was an early proponent of typed errors in Swift. This is how the Swift team convinced me I was wrong. Strongly typed errors are fragile in ways that can lead to poor API evolution. If the API promises to throw only one of precisely 3 errors, then when a fourth error condition arises in … Read more
JLS hunting: It is a compile-time error if a final variable is assigned to unless it is definitely unassigned (ยง16) immediately prior to the assignment. Quoth chapter 16: V is definitely unassigned before a catch block iff all of the following conditions hold: V is definitely unassigned after the try block. V is definitely unassigned … Read more
Consider the fact that there are really three (or more) code blocks in play here: try {} catch (myexcption) {} catch (myotherexception) {} finally {} Keep in mind that these are in the scope of a larger context and the exceptions not caught are potentually caught further up the stack. Note that this is basically … Read more