Add optional docstrings to member descriptors. For backwards

compatibility, this required all places where an array of "struct
memberlist" structures was declared that is referenced from a type's
tp_members slot to change the type of the structure to PyMemberDef;
"struct memberlist" is now only used by old code that still calls
PyMember_Get/Set.  The code in PyObject_GenericGetAttr/SetAttr now
calls the new APIs PyMember_GetOne/SetOne, which take a PyMemberDef
argument.

As examples, I added actual docstrings to the attributes of a few
types: file, complex, instance method, super, and xxsubtype.spamlist.

Also converted the symtable to new style getattr.

9 files changed, 57 insertions, 34 deletions

diff --git a/Objects/classobject.c b/Objects/classobject.c
index 3845dfc..f8ee6fd 100644
--- a/Objects/classobject.c
+++ b/Objects/classobject.c
@@ -2006,10 +2006,13 @@ PyMethod_New(PyObject *func, PyObject *self, PyObject *class)
 
 #define OFF(x) offsetof(PyMethodObject, x)
 
-static struct memberlist instancemethod_memberlist[] = {
-	{"im_class",	T_OBJECT,	OFF(im_class),	READONLY|RESTRICTED},
-	{"im_func",	T_OBJECT,	OFF(im_func),	READONLY|RESTRICTED},
-	{"im_self",	T_OBJECT,	OFF(im_self),	READONLY|RESTRICTED},
+static PyMemberDef instancemethod_memberlist[] = {
+	{"im_class",	T_OBJECT,	OFF(im_class),	READONLY|RESTRICTED,
+	 "the class associated with a method"},
+	{"im_func",	T_OBJECT,	OFF(im_func),	READONLY|RESTRICTED,
+	 "the function (or other callable) implementing a method"},
+	{"im_self",	T_OBJECT,	OFF(im_self),	READONLY|RESTRICTED,
+	 "the instance to which a method is bound; None for unbound methods"},
 	{NULL}	/* Sentinel */
 };
 
diff --git a/Objects/complexobject.c b/Objects/complexobject.c
index a2ccadb..191dcba 100644
--- a/Objects/complexobject.c
+++ b/Objects/complexobject.c
@@ -625,9 +625,11 @@ static PyMethodDef complex_methods[] = {
 	{NULL,		NULL}		/* sentinel */
 };
 
-static struct memberlist complex_members[] = {
-	{"real", T_DOUBLE, offsetof(PyComplexObject, cval.real), 0},
-	{"imag", T_DOUBLE, offsetof(PyComplexObject, cval.imag), 0},
+static PyMemberDef complex_members[] = {
+	{"real", T_DOUBLE, offsetof(PyComplexObject, cval.real), 0,
+	 "the real part of a complex number"},
+	{"imag", T_DOUBLE, offsetof(PyComplexObject, cval.imag), 0,
+	 "the imaginary part of a complex number"},
 	{0},
 };
 
diff --git a/Objects/descrobject.c b/Objects/descrobject.c
index e5b08c3..dfbb3b6 100644
--- a/Objects/descrobject.c
+++ b/Objects/descrobject.c
@@ -21,7 +21,7 @@ typedef struct {
 
 typedef struct {
 	COMMON;
-	struct memberlist *d_member;
+	PyMemberDef *d_member;
 } PyMemberDescrObject;
 
 typedef struct {
@@ -126,8 +126,7 @@ member_get(PyMemberDescrObject *descr, PyObject *obj, PyTypeObject *type)
 
 	if (descr_check((PyDescrObject *)descr, obj, type, &res))
 		return res;
-	return PyMember_Get((char *)obj, descr->d_member,
-			    descr->d_member->name);
+	return PyMember_GetOne((char *)obj, descr->d_member);
 }
 
 static PyObject *
@@ -181,8 +180,7 @@ member_set(PyMemberDescrObject *descr, PyObject *obj, PyObject *value)
 
 	if (descr_setcheck((PyDescrObject *)descr, obj, value, &res))
 		return res;
-	return PyMember_Set((char *)obj, descr->d_member,
-			    descr->d_member->name, value);
+	return PyMember_SetOne((char *)obj, descr->d_member, value);
 }
 
 static int
@@ -289,7 +287,7 @@ wrapperdescr_call(PyWrapperDescrObject *descr, PyObject *args, PyObject *kwds)
 }
 
 static PyObject *
-member_get_doc(PyMethodDescrObject *descr, void *closure)
+method_get_doc(PyMethodDescrObject *descr, void *closure)
 {
 	if (descr->d_method->ml_doc == NULL) {
 		Py_INCREF(Py_None);
@@ -298,12 +296,27 @@ member_get_doc(PyMethodDescrObject *descr, void *closure)
 	return PyString_FromString(descr->d_method->ml_doc);
 }
 
-static struct memberlist descr_members[] = {
+static PyMemberDef descr_members[] = {
 	{"__objclass__", T_OBJECT, offsetof(PyDescrObject, d_type), READONLY},
 	{"__name__", T_OBJECT, offsetof(PyDescrObject, d_name), READONLY},
 	{0}
 };
 
+static struct getsetlist method_getset[] = {
+	{"__doc__", (getter)method_get_doc},
+	{0}
+};
+
+static PyObject *
+member_get_doc(PyMemberDescrObject *descr, void *closure)
+{
+	if (descr->d_member->doc == NULL) {
+		Py_INCREF(Py_None);
+		return Py_None;
+	}
+	return PyString_FromString(descr->d_member->doc);
+}
+
 static struct getsetlist member_getset[] = {
 	{"__doc__", (getter)member_get_doc},
 	{0}
@@ -355,7 +368,7 @@ static PyTypeObject PyMethodDescr_Type = {
 	0,					/* tp_iternext */
 	0,					/* tp_methods */
 	descr_members,				/* tp_members */
-	member_getset,				/* tp_getset */
+	method_getset,				/* tp_getset */
 	0,					/* tp_base */
 	0,					/* tp_dict */
 	(descrgetfunc)method_get,		/* tp_descr_get */
@@ -393,7 +406,7 @@ static PyTypeObject PyMemberDescr_Type = {
 	0,					/* tp_iternext */
 	0,					/* tp_methods */
 	descr_members,				/* tp_members */
-	0,					/* tp_getset */
+	member_getset,				/* tp_getset */
 	0,					/* tp_base */
 	0,					/* tp_dict */
 	(descrgetfunc)member_get,		/* tp_descr_get */
@@ -507,7 +520,7 @@ PyDescr_NewMethod(PyTypeObject *type, PyMethodDef *method)
 }
 
 PyObject *
-PyDescr_NewMember(PyTypeObject *type, struct memberlist *member)
+PyDescr_NewMember(PyTypeObject *type, PyMemberDef *member)
 {
 	PyMemberDescrObject *descr;
 
diff --git a/Objects/fileobject.c b/Objects/fileobject.c
index 6ceb83c..5c879ff 100644
--- a/Objects/fileobject.c
+++ b/Objects/fileobject.c
@@ -1383,10 +1383,13 @@ static PyMethodDef file_methods[] = {
 
 #define OFF(x) offsetof(PyFileObject, x)
 
-static struct memberlist file_memberlist[] = {
-	{"softspace",	T_INT,		OFF(f_softspace)},
-	{"mode",	T_OBJECT,	OFF(f_mode),	RO},
-	{"name",	T_OBJECT,	OFF(f_name),	RO},
+static PyMemberDef file_memberlist[] = {
+	{"softspace",	T_INT,		OFF(f_softspace), 0,
+	 "flag indicating that a space needs to be printed; used by print"},
+	{"mode",	T_OBJECT,	OFF(f_mode),	RO,
+	 "file mode ('r', 'w', 'a', possibly with 'b' or '+' added)"},
+	{"name",	T_OBJECT,	OFF(f_name),	RO,
+	 "file name"},
 	/* getattr(f, "closed") is implemented without this table */
 	{NULL}	/* Sentinel */
 };
diff --git a/Objects/frameobject.c b/Objects/frameobject.c
index fd9a4e2..cb7e80a 100644
--- a/Objects/frameobject.c
+++ b/Objects/frameobject.c
@@ -10,7 +10,7 @@
 
 #define OFF(x) offsetof(PyFrameObject, x)
 
-static struct memberlist frame_memberlist[] = {
+static PyMemberDef frame_memberlist[] = {
 	{"f_back",	T_OBJECT,	OFF(f_back),	RO},
 	{"f_code",	T_OBJECT,	OFF(f_code),	RO},
 	{"f_builtins",	T_OBJECT,	OFF(f_builtins),RO},
diff --git a/Objects/funcobject.c b/Objects/funcobject.c
index 91a3127..e1cf080 100644
--- a/Objects/funcobject.c
+++ b/Objects/funcobject.c
@@ -129,7 +129,7 @@ PyFunction_SetClosure(PyObject *op, PyObject *closure)
 
 #define RR ()
 
-static struct memberlist func_memberlist[] = {
+static PyMemberDef func_memberlist[] = {
         {"func_closure",  T_OBJECT,     OFF(func_closure),
 	 RESTRICTED|READONLY},
         {"func_doc",      T_OBJECT,     OFF(func_doc), WRITE_RESTRICTED},
diff --git a/Objects/moduleobject.c b/Objects/moduleobject.c
index 6d91ecc..586785c 100644
--- a/Objects/moduleobject.c
+++ b/Objects/moduleobject.c
@@ -9,7 +9,7 @@ typedef struct {
 	PyObject *md_dict;
 } PyModuleObject;
 
-struct memberlist module_members[] = {
+PyMemberDef module_members[] = {
 	{"__dict__", T_OBJECT, offsetof(PyModuleObject, md_dict), READONLY},
 	{0}
 };
diff --git a/Objects/sliceobject.c b/Objects/sliceobject.c
index 8f52f9e..81517a8 100644
--- a/Objects/sliceobject.c
+++ b/Objects/sliceobject.c
@@ -129,7 +129,7 @@ slice_repr(PySliceObject *r)
 	return s;
 }
 
-static struct memberlist slice_members[] = {
+static PyMemberDef slice_members[] = {
 	{"start", T_OBJECT, offsetof(PySliceObject, start), READONLY},
 	{"stop", T_OBJECT, offsetof(PySliceObject, stop), READONLY},
 	{"step", T_OBJECT, offsetof(PySliceObject, step), READONLY},
diff --git a/Objects/typeobject.c b/Objects/typeobject.c
index 26ddabe..b53555d 100644
--- a/Objects/typeobject.c
+++ b/Objects/typeobject.c
@@ -4,7 +4,7 @@
 #include "Python.h"
 #include "structmember.h"
 
-static struct memberlist type_members[] = {
+static PyMemberDef type_members[] = {
 	{"__basicsize__", T_INT, offsetof(PyTypeObject,tp_basicsize),READONLY},
 	{"__itemsize__", T_INT, offsetof(PyTypeObject, tp_itemsize), READONLY},
 	{"__flags__", T_LONG, offsetof(PyTypeObject, tp_flags), READONLY},
@@ -263,7 +263,7 @@ typedef struct {
 	PyMappingMethods as_mapping;
 	PyBufferProcs as_buffer;
 	PyObject *name, *slots;
-	struct memberlist members[1];
+	PyMemberDef members[1];
 } etype;
 
 /* type test with subclassing support */
@@ -672,7 +672,7 @@ type_new(PyTypeObject *metatype, PyObject *args, PyObject *kwds)
 	PyObject *slots, *tmp;
 	PyTypeObject *type, *base, *tmptype, *winner;
 	etype *et;
-	struct memberlist *mp;
+	PyMemberDef *mp;
 	int i, nbases, nslots, slotoffset, dynamic, add_dict, add_weak;
 
 	/* Special case: type(x) should return x->ob_type */
@@ -1087,7 +1087,7 @@ PyTypeObject PyType_Type = {
 	0,					/* ob_size */
 	"type",					/* tp_name */
 	sizeof(etype),				/* tp_basicsize */
-	sizeof(struct memberlist),		/* tp_itemsize */
+	sizeof(PyMemberDef),			/* tp_itemsize */
 	(destructor)type_dealloc,		/* tp_dealloc */
 	0,					/* tp_print */
 	0,			 		/* tp_getattr */
@@ -1192,7 +1192,7 @@ object_free(PyObject *self)
 	PyObject_Del(self);
 }
 
-static struct memberlist object_members[] = {
+static PyMemberDef object_members[] = {
 	{"__class__", T_OBJECT, offsetof(PyObject, ob_type), READONLY},
 	{0}
 };
@@ -1263,7 +1263,7 @@ add_methods(PyTypeObject *type, PyMethodDef *meth)
 }
 
 static int
-add_members(PyTypeObject *type, struct memberlist *memb)
+add_members(PyTypeObject *type, PyMemberDef *memb)
 {
 	PyObject *dict = type->tp_defined;
 
@@ -3221,9 +3221,11 @@ typedef struct {
 	PyObject *obj;
 } superobject;
 
-static struct memberlist super_members[] = {
-	{"__type__", T_OBJECT, offsetof(superobject, type), READONLY},
-	{"__obj__",  T_OBJECT, offsetof(superobject, obj), READONLY},
+static PyMemberDef super_members[] = {
+	{"__thisclass__", T_OBJECT, offsetof(superobject, type), READONLY,
+	 "the class invoking super()"},
+	{"__self__",  T_OBJECT, offsetof(superobject, obj), READONLY,
+	 "the instance invoking super(); may be None"},
 	{0}
 };