chore: use explicit defaulting in pyobject macros (#4017)

* Use equals default in pyobject macros

* Remove extra semicolon

* Update clang-tidy equals-default rule to not ignore macros

* Fix formatting

* One last formatting change

.clang-tidy

@@ -63,6 +63,8 @@ Checks: |
   -bugprone-unused-raii,
 
 CheckOptions:
+- key:             modernize-use-equals-default.IgnoreMacros
+  value:           false
 - key:             performance-for-range-copy.WarnOnAllAutoCopies
   value:           true
 - key:             performance-inefficient-string-concatenation.StrictMode

include/pybind11/numpy.h

@@ -537,7 +537,7 @@ PYBIND11_NAMESPACE_END(detail)
 
 class dtype : public object {
 public:
-    PYBIND11_OBJECT_DEFAULT(dtype, object, detail::npy_api::get().PyArrayDescr_Check_);
+    PYBIND11_OBJECT_DEFAULT(dtype, object, detail::npy_api::get().PyArrayDescr_Check_)
 
     explicit dtype(const buffer_info &info) {
         dtype descr(_dtype_from_pep3118()(pybind11::str(info.format)));

include/pybind11/pytypes.h

@@ -1283,7 +1283,7 @@ public:
 
 #define PYBIND11_OBJECT_CVT_DEFAULT(Name, Parent, CheckFun, ConvertFun)                           \
     PYBIND11_OBJECT_CVT(Name, Parent, CheckFun, ConvertFun)                                       \
-    Name() : Parent() {}
+    Name() = default;
 
 #define PYBIND11_OBJECT_CHECK_FAILED(Name, o_ptr)                                                 \
     ::pybind11::type_error("Object of type '"                                                     \
@@ -1306,7 +1306,7 @@ public:
 
 #define PYBIND11_OBJECT_DEFAULT(Name, Parent, CheckFun)                                           \
     PYBIND11_OBJECT(Name, Parent, CheckFun)                                                       \
-    Name() : Parent() {}
+    Name() = default;
 
 /// \addtogroup pytypes
 /// @{