Jason Turner: IIFE in C++ for Performance and Safety

IIFE (Immediately-Invoked Function Expression) is a common tool used in JavaScript. The idea is to both define an anonymous function and call it in the same expression. The point is to produce a local scope for variables so they do not pollute the global scope.

This same technique can be deployed in C++ to lead to cleaner, safer, more performant code when building up objects which require multiple steps to initialize.

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[ennokoster]

I dont know the performance implications but isnt the ternary operator a viable alternative at least for simple cases? The simple if-else assignment example at the beginning is pretty much exactly the example given for the operator on cplusplus.com

[vivekatbitm]

Doesn't IIFE Lambda has more cost than const initialisation?

[jenius]

I think the ternary is more readable and I find tiny functions that do one thing fine. 95% of the time I see this being used it feels like a solution looking for a problem.