py/modbuiltins: Make built-in dir support the __dir__ special method.

If MICROPY_PY_ALL_SPECIAL_METHODS is enabled then dir() will now delegate
to the special method __dir__ if the object it is listing has this method.

1 files changed, 3 insertions, 0 deletions

diff --git a/py/makeqstrdata.py b/py/makeqstrdata.py
index 38fde1a9c..3c0a60909 100644
--- a/py/makeqstrdata.py
+++ b/py/makeqstrdata.py
@@ -114,6 +114,9 @@ def parse_input_headers(infiles):
                 if ident == "":
                     # Sort empty qstr above all still
                     order = -200000
+                elif ident == "__dir__":
+                    # Put __dir__ after empty qstr for builtin dir() to work
+                    order = -190000
                 elif ident.startswith("__"):
                     order -= 100000
                 qstrs[ident] = (order, ident, qstr)