<div>Hi all,</div><div><br></div><div>we have noticed that the RecursiveASTMatcher does not seem to traverse nested template instantiations as in this code segment:</div><div><br></div><div>template <typename Rhs> struct Outer {</div>
<div> template <typename Lhs> struct Inner {</div><div> void Compare() {</div><div> Lhs y;</div><div> y.x();</div><div> }</div><div> };</div><div>};</div><div>struct A { void x(); };</div><div>int main() {</div>
<div> (new Outer<A>::Inner<A>())->Compare();</div><div>}</div><div><br></div><div>Here, the templates Outer and Inner are instantiated with type A, but the Inner-instantiation is not traversed even if the RecursiveASTMatcher's subclass implements shouldVisitTemplateInstantiations() to return true. The reason is, that isThisDeclarationADefinition() does (erroneously?) return false for this instantiation. The attached patch works around this. As far as I can tell, isThisDeclarationADefinition() is checked in order to prevent forward-declared templates to be traversed multiple times. However, if this template is instantiated from a member template, this cannot happen.</div>
<div><br></div><div>Kind regards,</div><div>Daniel</div>