On Saturday, 3 September 2016 at 14:40:37 UTC, Martin Nowak wrote:
On Wednesday, 31 August 2016 at 09:56:17 UTC, Johan Engelen
wrote:
(I can only think of complicated stuff that requires pretty
much whole-program analysis to prove validity, and in that
case adding `private` doesn't help any more)
Yes, it does help. As private prevents usage outside of a
module it allows to do some optimizations that required whole
program analysis otherwise, e.g. variables and functions can
get internal linkage, thus reducing loads/stores and indirect
calls.
There are enough ways to leak access to private entity (alias,
template argument, taking address, some compile-time
introspection) to make such optimizations impossible without
extensive program analysis.
