[cfe-dev] How to change typedef in AST

[Jaymie Strecker]

Hi, everyone. 

Is it possible to parse some code containing a typedef, then modify that typedef in the AST? For example, the input code contains `typedef int blah` and I want to change it to `typedef float blah`. 

I found some example code for traversing the AST, which I modified to visit each typedef declaration: 

	bool VisitDecl(Decl *d) {
		d->dump();printf("\n");
		if (TypedefDecl::classof(d)) {
			TypedefDecl *td = static_cast<TypedefDecl *>(d);
			td->getTypeForDecl()->dump();  // prints "NULL TYPE"
			// Type *t = ???;
			// td->setTypeForDecl(t); ???
		}
        return true;
    }

But I wasn't sure where to go next. Any hints? 

---
Jaymie Strecker
jstrecker at kosada.com

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