Moving the kernel to modern C [LWN.net]

Moving the kernel to modern C

Posted Feb 25, 2022 20:31 UTC (Fri) by abatters (✭ supporter ✭, #6932)
In reply to: Moving the kernel to modern C by ballombe
Parent article: Moving the kernel to modern C

> gnu89 nested functions

Which require your entire program to have an executable stack.

to post comments

Posted Feb 25, 2022 20:55 UTC (Fri) by pbonzini (subscriber, #60935) [Link] (2 responses)

They only do if they are used as function pointers.

Posted Feb 25, 2022 22:12 UTC (Fri) by ncm (guest, #165) [Link] (1 responses)

Of course in C++ and Rust you have function literals. In C++,


  auto f = [](auto a, auto b) { return a + b; };
  assert(f(3, 4) == 7);
  assert(f(3.25, 3.75) == 7.0);
  assert(f("3"s, "4"s) == "34");

Rust lambdas might be less versatile.

Posted Feb 26, 2022 0:18 UTC (Sat) by camhusmj38 (subscriber, #99234) [Link]

No, Rust Lambdas generally work the same as C++ lambdas - subject to the usual Rust rules about lifetime.