Issue #27985: Implement PEP 526 -- Syntax for Variable Annotations.
Patch by Ivan Levkivskyi.
diff --git a/Python/Python-ast.c b/Python/Python-ast.c
index 1193c7c..6ab57df 100644
--- a/Python/Python-ast.c
+++ b/Python/Python-ast.c
@@ -86,6 +86,15 @@
"op",
"value",
};
+static PyTypeObject *AnnAssign_type;
+_Py_IDENTIFIER(annotation);
+_Py_IDENTIFIER(simple);
+static char *AnnAssign_fields[]={
+ "target",
+ "annotation",
+ "value",
+ "simple",
+};
static PyTypeObject *For_type;
_Py_IDENTIFIER(iter);
_Py_IDENTIFIER(orelse);
@@ -466,7 +475,6 @@
"col_offset",
};
_Py_IDENTIFIER(arg);
-_Py_IDENTIFIER(annotation);
static char *arg_fields[]={
"arg",
"annotation",
@@ -873,6 +881,8 @@
if (!Assign_type) return 0;
AugAssign_type = make_type("AugAssign", stmt_type, AugAssign_fields, 3);
if (!AugAssign_type) return 0;
+ AnnAssign_type = make_type("AnnAssign", stmt_type, AnnAssign_fields, 4);
+ if (!AnnAssign_type) return 0;
For_type = make_type("For", stmt_type, For_fields, 4);
if (!For_type) return 0;
AsyncFor_type = make_type("AsyncFor", stmt_type, AsyncFor_fields, 4);
@@ -1407,6 +1417,34 @@
}
stmt_ty
+AnnAssign(expr_ty target, expr_ty annotation, expr_ty value, int simple, int
+ lineno, int col_offset, PyArena *arena)
+{
+ stmt_ty p;
+ if (!target) {
+ PyErr_SetString(PyExc_ValueError,
+ "field target is required for AnnAssign");
+ return NULL;
+ }
+ if (!annotation) {
+ PyErr_SetString(PyExc_ValueError,
+ "field annotation is required for AnnAssign");
+ return NULL;
+ }
+ p = (stmt_ty)PyArena_Malloc(arena, sizeof(*p));
+ if (!p)
+ return NULL;
+ p->kind = AnnAssign_kind;
+ p->v.AnnAssign.target = target;
+ p->v.AnnAssign.annotation = annotation;
+ p->v.AnnAssign.value = value;
+ p->v.AnnAssign.simple = simple;
+ p->lineno = lineno;
+ p->col_offset = col_offset;
+ return p;
+}
+
+stmt_ty
For(expr_ty target, expr_ty iter, asdl_seq * body, asdl_seq * orelse, int
lineno, int col_offset, PyArena *arena)
{
@@ -2740,6 +2778,30 @@
goto failed;
Py_DECREF(value);
break;
+ case AnnAssign_kind:
+ result = PyType_GenericNew(AnnAssign_type, NULL, NULL);
+ if (!result) goto failed;
+ value = ast2obj_expr(o->v.AnnAssign.target);
+ if (!value) goto failed;
+ if (_PyObject_SetAttrId(result, &PyId_target, value) == -1)
+ goto failed;
+ Py_DECREF(value);
+ value = ast2obj_expr(o->v.AnnAssign.annotation);
+ if (!value) goto failed;
+ if (_PyObject_SetAttrId(result, &PyId_annotation, value) == -1)
+ goto failed;
+ Py_DECREF(value);
+ value = ast2obj_expr(o->v.AnnAssign.value);
+ if (!value) goto failed;
+ if (_PyObject_SetAttrId(result, &PyId_value, value) == -1)
+ goto failed;
+ Py_DECREF(value);
+ value = ast2obj_int(o->v.AnnAssign.simple);
+ if (!value) goto failed;
+ if (_PyObject_SetAttrId(result, &PyId_simple, value) == -1)
+ goto failed;
+ Py_DECREF(value);
+ break;
case For_kind:
result = PyType_GenericNew(For_type, NULL, NULL);
if (!result) goto failed;
@@ -4535,6 +4597,64 @@
if (*out == NULL) goto failed;
return 0;
}
+ isinstance = PyObject_IsInstance(obj, (PyObject*)AnnAssign_type);
+ if (isinstance == -1) {
+ return 1;
+ }
+ if (isinstance) {
+ expr_ty target;
+ expr_ty annotation;
+ expr_ty value;
+ int simple;
+
+ if (_PyObject_HasAttrId(obj, &PyId_target)) {
+ int res;
+ tmp = _PyObject_GetAttrId(obj, &PyId_target);
+ if (tmp == NULL) goto failed;
+ res = obj2ast_expr(tmp, &target, arena);
+ if (res != 0) goto failed;
+ Py_CLEAR(tmp);
+ } else {
+ PyErr_SetString(PyExc_TypeError, "required field \"target\" missing from AnnAssign");
+ return 1;
+ }
+ if (_PyObject_HasAttrId(obj, &PyId_annotation)) {
+ int res;
+ tmp = _PyObject_GetAttrId(obj, &PyId_annotation);
+ if (tmp == NULL) goto failed;
+ res = obj2ast_expr(tmp, &annotation, arena);
+ if (res != 0) goto failed;
+ Py_CLEAR(tmp);
+ } else {
+ PyErr_SetString(PyExc_TypeError, "required field \"annotation\" missing from AnnAssign");
+ return 1;
+ }
+ if (exists_not_none(obj, &PyId_value)) {
+ int res;
+ tmp = _PyObject_GetAttrId(obj, &PyId_value);
+ if (tmp == NULL) goto failed;
+ res = obj2ast_expr(tmp, &value, arena);
+ if (res != 0) goto failed;
+ Py_CLEAR(tmp);
+ } else {
+ value = NULL;
+ }
+ if (_PyObject_HasAttrId(obj, &PyId_simple)) {
+ int res;
+ tmp = _PyObject_GetAttrId(obj, &PyId_simple);
+ if (tmp == NULL) goto failed;
+ res = obj2ast_int(tmp, &simple, arena);
+ if (res != 0) goto failed;
+ Py_CLEAR(tmp);
+ } else {
+ PyErr_SetString(PyExc_TypeError, "required field \"simple\" missing from AnnAssign");
+ return 1;
+ }
+ *out = AnnAssign(target, annotation, value, simple, lineno, col_offset,
+ arena);
+ if (*out == NULL) goto failed;
+ return 0;
+ }
isinstance = PyObject_IsInstance(obj, (PyObject*)For_type);
if (isinstance == -1) {
return 1;
@@ -7517,6 +7637,8 @@
NULL;
if (PyDict_SetItemString(d, "AugAssign", (PyObject*)AugAssign_type) < 0)
return NULL;
+ if (PyDict_SetItemString(d, "AnnAssign", (PyObject*)AnnAssign_type) < 0)
+ return NULL;
if (PyDict_SetItemString(d, "For", (PyObject*)For_type) < 0) return NULL;
if (PyDict_SetItemString(d, "AsyncFor", (PyObject*)AsyncFor_type) < 0)
return NULL;