Being lazy in C++

Old blog résumé Twitter Being lazy in C++ September 12, 2026 C++ Context Again, I haven’t posted in a long time. I suppose I’ll have to start all my new articles with this sentence, ahaha. I can say I was a bit lazy, and that’s a good…

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Old blog résumé Twitter Being lazy in C++ September 12, 2026 C++ Context Again, I haven’t posted in a long time. I suppose I’ll have to start all my new articles with this sentence, ahaha. I can say I was a bit lazy, and that’s a good thing because we’re going to see how to be lazy in C++.

Lazy initialization is the practice of delaying initialization until it is needed. It can be used to optimize performance (which will be the subject of the next article), but it popped up when I was asked an interesting question a while ago while working for one of my clients.

int complex_computation() { std::cout << "Compute" << std::endl; return 2; } int main() { std::optional<int> a = 50; std::optional<int> b; std::cout << a.value_or(complex_computation()) << "\n"; std::cout <<…

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