In most cases this means adding @public to things that get serialized;
in a few cases it means using a modern public stdlib API instead of
a legacy thing I was trying to keep @internal.
Swift SVN r19350
The implied semantics are:
- side-effects can occur any time before the first invocation.
- all calls to the same global_init function have the same side-effects.
- any operation that may observe the initializer's side-effects must be
preceded by a call to the initializer.
This is currently true if the function is an addressor that was lazily
generated from a global variable access. Note that the initialization
function itself does not need this attribute. It is private and only
called within the addressor.
Swift SVN r16683
