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::errno and ned14's system_code go brrrrrrr (i.imgflip.com)
submitted 1 year ago by to c/cpp@programming.dev
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I've always found C++'s "trend" of handling normal or non-exceptional system errors with exceptions lackluster (and I'm being charitable). Overall trimming things down to (basically) passing around a couple integers and telling the user to check their manual is much better, much less error prone, and much more efficient and deterministic.

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[–] 11 points 1 year ago (9 children)

Use an enum class, it's strongly typed but the compiler just treats it as an integer

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  • [–] 3 points 1 year ago (7 children)

    Same, I also like giving this the [[nodiscard]] attribute if I want to make sure that it's not ignored.

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  • [–] 4 points 1 year ago (6 children)

    -Wunused-result is good practice in general

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  • [–] 2 points 1 year ago (5 children)

    I'm mixed on this one, because sometimes you'll want to call a function for its side effects without caring about the return value. E. g. container methods returning an iterator that shows you where the side effect took place.

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  • [–] 3 points 1 year ago (4 children)

    Right, so just cast the returned value to void: (void)function();

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  • [–] 3 points 1 year ago (2 children)

    The new C++ way is

    std::ignore = function();
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  • [–] [S] 0 points 1 year ago

    First: it's not new, it's been around since C++03.

    Second... it's not even that great. It's more characters to type and you have to deal with stds and colons. (void) is a classic and works everywhere.

    But hey, at least it's not static_cast<void>(...).

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