bpo-39245: Switch to public API for Vectorcall (GH-18460)

The bulk of this patch was generated automatically with:

    for name in \
        PyObject_Vectorcall \
        Py_TPFLAGS_HAVE_VECTORCALL \
        PyObject_VectorcallMethod \
        PyVectorcall_Function \
        PyObject_CallOneArg \
        PyObject_CallMethodNoArgs \
        PyObject_CallMethodOneArg \
    ;
    do
        echo $name
        git grep -lwz _$name | xargs -0 sed -i "s/\b_$name\b/$name/g"
    done

    old=_PyObject_FastCallDict
    new=PyObject_VectorcallDict
    git grep -lwz $old | xargs -0 sed -i "s/\b$old\b/$new/g"

and then cleaned up:

- Revert changes to in docs & news
- Revert changes to backcompat defines in headers
- Nudge misaligned comments

1 files changed, 8 insertions, 8 deletions

diff --git a/Python/bltinmodule.c b/Python/bltinmodule.c
index 980b81041b4..cb048af9785 100644
--- a/Python/bltinmodule.c
+++ b/Python/bltinmodule.c
@@ -56,7 +56,7 @@ update_bases(PyObject *bases, PyObject *const *args, Py_ssize_t nargs)
             }
             continue;
         }
-        new_base = _PyObject_CallOneArg(meth, bases);
+        new_base = PyObject_CallOneArg(meth, bases);
         Py_DECREF(meth);
         if (!new_base) {
             goto error;
@@ -203,7 +203,7 @@ builtin___build_class__(PyObject *self, PyObject *const *args, Py_ssize_t nargs,
     }
     else {
         PyObject *pargs[2] = {name, bases};
-        ns = _PyObject_FastCallDict(prep, pargs, 2, mkw);
+        ns = PyObject_VectorcallDict(prep, pargs, 2, mkw);
         Py_DECREF(prep);
     }
     if (ns == NULL) {
@@ -229,7 +229,7 @@ builtin___build_class__(PyObject *self, PyObject *const *args, Py_ssize_t nargs,
             }
         }
         PyObject *margs[3] = {name, bases, ns};
-        cls = _PyObject_FastCallDict(meta, margs, 3, mkw);
+        cls = PyObject_VectorcallDict(meta, margs, 3, mkw);
         if (cls != NULL && PyType_Check(cls) && PyCell_Check(cell)) {
             PyObject *cell_cls = PyCell_GET(cell);
             if (cell_cls != cls) {
@@ -489,7 +489,7 @@ builtin_breakpoint(PyObject *self, PyObject *const *args, Py_ssize_t nargs, PyOb
     }
 
     Py_INCREF(hook);
-    PyObject *retval = _PyObject_Vectorcall(hook, args, nargs, keywords);
+    PyObject *retval = PyObject_Vectorcall(hook, args, nargs, keywords);
     Py_DECREF(hook);
     return retval;
 }
@@ -575,7 +575,7 @@ filter_next(filterobject *lz)
             ok = PyObject_IsTrue(item);
         } else {
             PyObject *good;
-            good = _PyObject_CallOneArg(lz->func, item);
+            good = PyObject_CallOneArg(lz->func, item);
             if (good == NULL) {
                 Py_DECREF(item);
                 return NULL;
@@ -1631,7 +1631,7 @@ min_max(PyObject *args, PyObject *kwds, int op)
     while (( item = PyIter_Next(it) )) {
         /* get the value from the key function */
         if (keyfunc != NULL) {
-            val = _PyObject_CallOneArg(keyfunc, item);
+            val = PyObject_CallOneArg(keyfunc, item);
             if (val == NULL)
                 goto Fail_it_item;
         }
@@ -2178,7 +2178,7 @@ builtin_round_impl(PyObject *module, PyObject *number, PyObject *ndigits)
     if (ndigits == Py_None)
         result = _PyObject_CallNoArg(round);
     else
-        result = _PyObject_CallOneArg(round, ndigits);
+        result = PyObject_CallOneArg(round, ndigits);
     Py_DECREF(round);
     return result;
 }
@@ -2234,7 +2234,7 @@ builtin_sorted(PyObject *self, PyObject *const *args, Py_ssize_t nargs, PyObject
     }
 
     assert(nargs >= 1);
-    v = _PyObject_Vectorcall(callable, args + 1, nargs - 1, kwnames);
+    v = PyObject_Vectorcall(callable, args + 1, nargs - 1, kwnames);
     Py_DECREF(callable);
     if (v == NULL) {
         Py_DECREF(newlist);