renaming holder_helper<T>::get to yyy_get, to pin-point where it is used

include/pybind11/cast.h

@@ -1488,7 +1488,7 @@ template <typename... Ts> class type_caster<std::tuple<Ts...>>
 /// custom holders, but it's only necessary if the type has a non-standard interface.
 template <typename T>
 struct holder_helper {
-    static auto get(const T &p) -> decltype(p.get()) { return p.get(); }
+    static auto yyy_get(const T &p) -> decltype(p.get()) { return p.get(); }  // default implementation
 };
 
 /// Type caster for holder types like std::shared_ptr, etc.
@@ -1515,7 +1515,7 @@ public:
     explicit operator holder_type&() { return holder; }
 
     static handle cast(const holder_type &src, return_value_policy, handle) {
-        const auto *ptr = holder_helper<holder_type>::get(src);
+        const auto *ptr = holder_helper<holder_type>::yyy_get(src);  // copyable_holder_caster::cast
         return type_caster_base<type>::cast_holder(ptr, &src);
     }
 
@@ -1530,7 +1530,7 @@ protected:
         if (v_h.holder_constructed()) {
             value = v_h.xxx_value_ptr<void>();
             holder = v_h.template xxx_holder<holder_type>();
-            if (holder_helper<holder_type>::get(holder) != value) {
+            if (holder_helper<holder_type>::yyy_get(holder) != value) {  // copyable_holder_caster::load_value consistency check added by rwgk@
                 throw std::runtime_error("holder.get() != value in copyable_holder_caster::load_value");
             }
             return true;
@@ -1576,7 +1576,7 @@ struct move_only_holder_caster {
             "Holder classes are only supported for custom types");
 
     static handle cast(holder_type &&src, return_value_policy, handle) {
-        auto *ptr = holder_helper<holder_type>::get(src);
+        auto *ptr = holder_helper<holder_type>::yyy_get(src);  // move_only_holder_caster::cast
         return type_caster_base<type>::cast_holder(ptr, std::addressof(src));
     }
     static constexpr auto name = type_caster_base<type>::name;

include/pybind11/detail/init.h

@@ -131,7 +131,7 @@ void construct(value_and_holder &v_h, Alias<Class> *alias_ptr, bool) {
 // derived type (through those holder's implicit conversion from derived class holder constructors).
 template <typename Class>
 void construct(value_and_holder &v_h, Holder<Class> holder, bool need_alias) {
-    auto *ptr = holder_helper<Holder<Class>>::get(holder);
+    auto *ptr = holder_helper<Holder<Class>>::yyy_get(holder);  // construct from holder
     no_nullptr(ptr);
     // If we need an alias, check that the held pointer is actually an alias instance
     if (Class::has_alias && need_alias && !is_alias<Class>(ptr))

tests/test_smart_ptr.cpp

@@ -25,7 +25,7 @@ PYBIND11_DECLARE_HOLDER_TYPE(T, ref<T>, true);
 namespace pybind11 { namespace detail {
     template <typename T>
     struct holder_helper<ref<T>> {
-        static const T *get(const ref<T> &p) { return p.get_ptr(); }
+        static const T *yyy_get(const ref<T> &p) { return p.get_ptr(); }
     };
 } // namespace detail
 } // namespace pybind11