* Otherwise it is undefined behavior to access the field of another `.as`.
* Accessing the right `.as` field according mode would be extra overhead.
7dc41ee803
This commit is the initial sync of all files from ruby/yarp
into ruby/ruby. Notably, it does the following:
* Sync all ruby/yarp/lib/ files to ruby/ruby/lib/yarp
* Sync all ruby/yarp/src/ files to ruby/ruby/yarp/
* Sync all ruby/yarp/test/ files to ruby/ruby/test/yarp
