Added a two new operators: "?->" and "?:"
?-> can be used to index something that is either indexable or null.
?: is an alias for ||
Very useful for things like:
C c = a && a->b && a->b->c;
which can now be rewritten as
C c = a?->b?->c;
The code in language.yacc also supports ?. and ?, but there are
syntax conflicts with ?: for those:
?. conflicts with expr?.Module:...
? conflicts wtih expr?[softcast]:...
?: was added mostly to be compatible with other 'modern' C-like