`std::deque<Slice>::const_iterator it; it->data()` was matched by the
method's name alone, so it could reach any class with a `data`, and
`itr->c_str()` on a `std::vector<std::string>::const_iterator` reached
gtest's `FilePath::c_str`. A `->` on a value of an iterator type now
reaches the container's element, as `->` on a smart pointer reaches what it
holds: the element is read from the container's template arguments
(cppRangeElementOf), before the container's own `iterator` alias would
lose them (protobuf's `RepeatedPtrField<T>::iterator`), and looked up as
C++ does. A library element (`std::string`) or the caller's template
parameter calls no project method. An element only a class template's own
`begin()`/`operator*` writes with its parameter (googletest's
`ParamGenerator<T>::iterator`) goes on as before.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Colby Mchenry