From 9717fd235d31b576855a0c0061b7834c0b0f70a9 Mon Sep 17 00:00:00 2001
From: Dan Halbert <halbert@halwitz.org>
Date: Tue, 3 May 2022 15:28:42 -0400
Subject: [PATCH] make Pin hashable

---
 locale/circuitpython.pot              |  2 +-
 shared-bindings/microcontroller/Pin.c | 20 +++++++++++++++++++-
 2 files changed, 20 insertions(+), 2 deletions(-)

diff --git a/locale/circuitpython.pot b/locale/circuitpython.pot
index 3bec8b622b..db06147fe0 100644
--- a/locale/circuitpython.pot
+++ b/locale/circuitpython.pot
@@ -623,7 +623,7 @@ msgstr ""
 msgid "Buffer length must be a multiple of 512"
 msgstr ""
 
-#: ports/stm/common-hal/sdioio/SDCard.c
+#: ports/stm/common-hal/sdioio/SDCard.c shared-bindings/floppyio/__init__.c
 msgid "Buffer must be a multiple of 512 bytes"
 msgstr ""
 
diff --git a/shared-bindings/microcontroller/Pin.c b/shared-bindings/microcontroller/Pin.c
index ee8336fa8a..80c8c1d33c 100644
--- a/shared-bindings/microcontroller/Pin.c
+++ b/shared-bindings/microcontroller/Pin.c
@@ -78,10 +78,28 @@ STATIC void mcu_pin_print(const mp_print_t *print, mp_obj_t self_in, mp_print_ki
     }
 }
 
+//|     def __hash__(self) -> int:
+//|         """Returns a hash for the Pin."""
+//|         ...
+//|
+STATIC mp_obj_t mcu_pin_unary_op(mp_unary_op_t op, mp_obj_t self_in) {
+    switch (op) {
+        case MP_UNARY_OP_HASH: {
+            return mp_obj_id(self_in);
+        }
+        default:
+            return MP_OBJ_NULL; // op not supported
+    }
+}
+
 const mp_obj_type_t mcu_pin_type = {
     { &mp_type_type },
+    .flags = MP_TYPE_FLAG_EXTENDED,
     .name = MP_QSTR_Pin,
-    .print = mcu_pin_print
+    .print = mcu_pin_print,
+    MP_TYPE_EXTENDED_FIELDS(
+        .unary_op = mcu_pin_unary_op,
+        )
 };
 
 const mcu_pin_obj_t *validate_obj_is_pin(mp_obj_t obj) {