Deduplicate code with macro

Author: pablogsal

Parser/pegen/pegen.c

@@ -2063,27 +2063,25 @@ _PyPegen_get_invalid_target(expr_ty e)
  if (e == NULL) {
  return NULL;
  }
+
+#define VISIT_CONTAINER(CONTAINER, TYPE) do { \
+ Py_ssize_t len = asdl_seq_LEN(CONTAINER->v.TYPE.elts);\
+ for (Py_ssize_t i = 0; i < len; i++) {\
+ expr_ty other = asdl_seq_GET(CONTAINER->v.TYPE.elts, i);\
+ expr_ty child = _PyPegen_get_invalid_target(other);\
+ if (child != NULL) {\
+ return child;\
+ }\
+ }\
+ } while (0)
+
  switch (e->kind) {
  case List_kind: {
- Py_ssize_t len = asdl_seq_LEN(e->v.List.elts);
- for (Py_ssize_t i = 0; i < len; i++) {
- expr_ty other = asdl_seq_GET(e->v.List.elts, i);
- expr_ty child = _PyPegen_get_invalid_target(other);
- if (child != NULL) {
- return child;
- }
- }
+ VISIT_CONTAINER(e, List);
  return NULL;
  }
  case Tuple_kind: {
- Py_ssize_t len = asdl_seq_LEN(e->v.Tuple.elts);
- for (Py_ssize_t i = 0; i < len; i++) {
- expr_ty other = asdl_seq_GET(e->v.Tuple.elts, i);
- expr_ty child = _PyPegen_get_invalid_target(other);
- if (child != NULL) {
- return child;
- }
- }
+ VISIT_CONTAINER(e, Tuple);
  return NULL;
  }
  case Starred_kind: