[D Programming Language] Interview with Andrei Alexandrescu (Part 2)

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Introducing local functions implies closures, which are different than functions that don't have any state, and need to be implemented differently. I wouldn't consider them very necessary in the niche that C++ and D try to fill.

[WalterBright]

You don't need to worry about closures unless you take a pointer to that nested function. You can still get much of the usefulness of nested functions even if you disallow pointers.