[RFC] type safe trees

[Neil Booth]

Richard Kenner wrote:-

>     We really need front-end specific data structures, lowered to a common
>     representation (I suspect gimple).  It would even solve the current
>     Kenner thread, though he may disagree.  
> 
> I don't see how it would "solve" the current thread since that's what
> the Ada front end already does!  It has a quite complex internal
> representation that's basically a very heavily annotated (well over
> 100 fields and flags) parse tree.

Clearly it's not what is happening, as people are complaining about
the effect of your changes on data structure size for the C++ frontend.

Neil.