[cfe-dev] How to get Function Definition from CallExpr

[Kevin Boos]

Hello,

I have a piece of C code like so:

==========================================
void foo(); // just a declaration (sometimes in a header file instead)

void bar() {
    // definition here
}

int main() {
    bar();  // this one is fine
    foo();  // this one doesn't work
}

void foo() {
    // definition here
}
============================================

I'm using VisitStmt and looking at the CallExprs in main(). For the "bar()"
function above, I can get the FunctionDecl* using
CallExpr::getDirectCallee(). However, that doesn't work for the "foo()"
function -- calling getDirectCallee() gives me the function prototype, not
the definition of "foo()"...

So I tried using the Redeclarable class's "redecl_iterator" to dump each
redeclaration starting from  getDirectCallee()->redecls_begin. However, it
only iterates once for the function prototype and doesn't include the
actual definition of "foo()."

How can I get the real definition of foo() at the bottom of the code above?
I know it's probably something easy, but I just can't seem to get there.

Thanks in advance,
Kevin Boos
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