...belong to the same template". Add an opt-in annotation to template parameters that indicates...

...sometimes null pointers.
2. Have a syntactical opt-in way of force unwrapping a nullable...

...minor cost as things go, no reason to start thinking opt-in at this stage.

...build penalty, than i hope it's opt-in, i personally do not use any...

Yes its opt-in. https://dlang.org/spec/statement.html#synchronized-statement

...and opt-in on Windows. He was working on a DIP to make it opt...

...where attribute inference is not desired, an opt-out mechanism will be provided.

Currently, `.di...

...obviously wrong, except that the requirement to opt out of rvalue references seems error prone...

...defined(_WINSOCK_H) || \
      defined(__LWIP_OPT_H__) || defined(LWIP_HDR_OPT_H))
/* The check above...

...new semantics they'd have to explicitly opt in.


Yes, large breaking changes are a...