alt Hacker NewsIt has a slightly different meaning now, instead of hinting to the compiler that the variable should be placed in a register it now means that it is illegal to take the address of the variable (e.g. cannot create a pointer from it):
https://www.godbolt.org/z/eEYf5c59f
Might be useful in some situations although I currently can't think of any :)
I mean, yeah, but that function is really only an aid for the programmer in self-enforcing that rule; the compiler already knows whether the address of the variable is taken anywhere, and behave as is useful if it isn't taken anywhere…
Doesn't feel particularly valuable to have that "help" from the compiler against "accidentally" taking the address of a variable… I mean, how do you even accidentally do that?