[cfe-dev] About AST rewriting / manipulation
spellegrini at dps.uibk.ac.at
Fri Jan 23 10:42:41 CST 2009
I am trying to use Clang as a source-to-source compiler. Through the API
I've found the way to rewrite back the syntax tree into source code, and
that's not difficult. However, before writing back the syntax tree I
would like to manipulate the syntax tree in order to apply some code
For example I would like to rewrite something like f(a,b) into g(b, a, c)
Now I guess I should create the AST nodes I need (building a new
CallExpr... object and so on...) and then substitute the old f(...) with
the new g(...). The Clang API for creating AST nodes is nevertheless
quite complex to use, it's really too demanding.
Now, I am wonder that It would be very nice if I could write the
statement I want to substitute (or to add) as a string and then use the
the Clang parser to create the syntax tree of the piece of code I have
written in a way it can be easily plugged in the old main syntax tree
(of course the new instance of the parser should be invoked considering
the previous context...). Is it possible to have this kind of behavior?
Or my imagination simply went too far? :)
Any pointers / references related to this kind of topic are really welcome!
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