Exceptions vs Errors in Python

Yes. SyntaxError isn’t catchable except in cases of dynamically executed code (via eval/exec), because it occurs before the code is actually running. “Fatal” means “program dies regardless of what the code says”; that doesn’t happen with exceptions in Python, they’re all catchable. os._exit can forcibly kill the process, but it does so by bypassing the … Read more

How to deal with static storage duration warnings?

One way to defer initialization of global variables such as the ones you are using is to wrap them in get-functions. std::default_random_engine& getEngine() { // Initialized upon first call to the function. static std::default_random_engine engine(static_cast<unsigned int>(time(nullptr))); return engine; } std::uniform_int_distribution<unsigned int>& getRandomInt() { // Initialized upon first call to the function. static std::uniform_int_distribution<unsigned int> randomInt(1, … Read more

Why can Haskell exceptions only be caught inside the IO monad?

One of the reasons is the denotational semantics of Haskell. One of the neat properties of (pure) Haskell functions is their monotonicity — more defined argument yields more defined value. This property is very important e.g. to reason about recursive functions (read the article to understand why). Denotation of exception by definition is the bottom, … Read more

What is noexcept useful for?

The primary use of noexcept is for generic algorithms, e.g., when resizing a std::vector<T>: for an efficient algorithm moving elements it is necessary to know ahead of time that none of the moves will throw. If moving elements might throw, elements need to be copied instead. Using the noexcept(expr) operator the library implementation can determine … Read more

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