[dmd-internals] Add a ghostNode Hierachy ?

Stefan K via dmd-internals dmd-internals at puremagic.com
Mon Jun 6 14:48:31 PDT 2016


In DMD's AST we have something I'd like to call gohstNodes.
That is nodes which get lowered into others.
For example a the foreach-loop, the do while, while and do until loop.
Are all lowered into a for loop.

making the others into a ghost node which is never supposed to appear.
yet every visitor checks for them explicitly.

If all of those were a subclass of ghostnode which in turn would be a
subclass of RootObject.
Then one visit overload would suffice to catch them all.

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