* Map is unnecessary and inefficient in almost every case.
* Replaced by the new HashMap.
* Renamed Map to RBMap and Set to RBSet for cases that still make sense
(order matters) but use is discouraged.
There were very few cases where replacing by HashMap was undesired because
keeping the key order was intended.
I tried to keep those (as RBMap) as much as possible, but might have missed
some. Review appreciated!
This was evidently a typo. Didn't get a crash but GCC 12 raised a
`-Warray-bounds` warning:
```
In file included from ./core/io/stream_peer.h:34,
from ./core/io/packet_peer.h:34,
from ./core/multiplayer/multiplayer_peer.h:34,
from modules/webrtc/webrtc_multiplayer_peer.h:34,
from modules/webrtc/webrtc_multiplayer_peer.cpp:31:
In member function 'T* Ref<T>::operator->() [with T = WebRTCMultiplayerPeer::ConnectedPeer]',
inlined from 'virtual Error WebRTCMultiplayerPeer::put_packet(const uint8_t*, int)' at modules/webrtc/webrtc_multiplayer_peer.cpp:376:4:
./core/object/ref_counted.h:101:24: error: array subscript 0 is outside array bounds of 'Ref<WebRTCMultiplayerPeer::ConnectedPeer> [0]' [-Werror=array-bounds]
101 | return reference;
| ^~~~~~~~~
```
Due to the async nature of WebRTC implementations, the multiplayer peer
could end up having queued packets from a given connection before it is
able to emit the "peer_added" signal.
This commit ensures that packets from peers which are not notified yet
are skipped by `get_packet` and `get_available_packet_count`.
Move multiplayer classes to "core/multiplayer" subdir.
Move the RPCConfig and enums (TransferMode, RPCMode) to a separate
file (multiplayer.h), and bind them to the global namespace.
Move the RPC handling code to its own class (RPCManager).
Renames "get_rpc_sender_id" to "get_remote_sender_id".
* Added a new macro SNAME() that constructs and caches a local stringname.
* Subsequent usages use the cached version.
* Since these use a global static variable, a second refcounter of static usages need to be kept for cleanup time.
* Replaced all theme usages by this new macro.
* Replace all signal emission usages by this new macro.
* Replace all call_deferred usages by this new macro.
This is part of ongoing work to optimize GUI and the editor.
