Experimental: Allow local typedef declarations #3027
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This should be discussed by the language design working group.
This feature would be useful to make the
typeof
operator from #3017 much more useful.With this change one can write:
All standard scoping rules apply to the
typedef
. No other types can be declared locally, onlytypedef
. This means that there are no issues with types that may not be visible globally - only names that may not be visible globally.Unfortunately this required a relatively important change in the IR representation, which only supports single inheritance: the replacement of the StatOrDecl abstract class with its base class Node. So now block statements contain a
Vector<Node>
instead of aVector<StatOrDecl>
. This may require some changes in third-party backends.