gh-108511: Add C API functions which do not silently ignore errors (GH-109025)

Add the following functions:

* PyObject_HasAttrWithError()
* PyObject_HasAttrStringWithError()
* PyMapping_HasKeyWithError()
* PyMapping_HasKeyStringWithError()

Include/abstract.h

@@ -50,6 +50,25 @@ extern "C" {
 
    This function always succeeds. */
 
+
+/* Implemented elsewhere:
+
+   int PyObject_HasAttrStringWithError(PyObject *o, const char *attr_name);
+
+   Returns 1 if object 'o' has the attribute attr_name, and 0 otherwise.
+   This is equivalent to the Python expression: hasattr(o,attr_name).
+   Returns -1 on failure. */
+
+
+/* Implemented elsewhere:
+
+   int PyObject_HasAttrWithError(PyObject *o, PyObject *attr_name);
+
+   Returns 1 if o has the attribute attr_name, and 0 otherwise.
+   This is equivalent to the Python expression: hasattr(o,attr_name).
+   Returns -1 on failure. */
+
+
 /* Implemented elsewhere:
 
    PyObject* PyObject_GetAttr(PyObject *o, PyObject *attr_name);
@@ -821,6 +840,18 @@ PyAPI_FUNC(int) PyMapping_HasKeyString(PyObject *o, const char *key);
    This function always succeeds. */
 PyAPI_FUNC(int) PyMapping_HasKey(PyObject *o, PyObject *key);
 
+/* Return 1 if the mapping object has the key 'key', and 0 otherwise.
+   This is equivalent to the Python expression: key in o.
+   On failure, return -1. */
+
+PyAPI_FUNC(int) PyMapping_HasKeyWithError(PyObject *o, PyObject *key);
+
+/* Return 1 if the mapping object has the key 'key', and 0 otherwise.
+   This is equivalent to the Python expression: key in o.
+   On failure, return -1. */
+
+PyAPI_FUNC(int) PyMapping_HasKeyStringWithError(PyObject *o, const char *key);
+
 /* On success, return a list or tuple of the keys in mapping object 'o'.
    On failure, return NULL. */
 PyAPI_FUNC(PyObject *) PyMapping_Keys(PyObject *o);

Include/object.h

@@ -394,6 +394,10 @@ PyAPI_FUNC(int) PyObject_GetOptionalAttrString(PyObject *, const char *, PyObjec
 PyAPI_FUNC(int) PyObject_SetAttr(PyObject *, PyObject *, PyObject *);
 PyAPI_FUNC(int) PyObject_DelAttr(PyObject *v, PyObject *name);
 PyAPI_FUNC(int) PyObject_HasAttr(PyObject *, PyObject *);
+#if !defined(Py_LIMITED_API) || Py_LIMITED_API+0 >= 0x030d0000
+PyAPI_FUNC(int) PyObject_HasAttrWithError(PyObject *, PyObject *);
+PyAPI_FUNC(int) PyObject_HasAttrStringWithError(PyObject *, const char *);
+#endif
 PyAPI_FUNC(PyObject *) PyObject_SelfIter(PyObject *);
 PyAPI_FUNC(PyObject *) PyObject_GenericGetAttr(PyObject *, PyObject *);
 PyAPI_FUNC(int) PyObject_GenericSetAttr(PyObject *, PyObject *, PyObject *);