From 171c2188d111c4b390c530e534ed97b277c5c4a6 Mon Sep 17 00:00:00 2001
From: Aditya Dixit <adityadixit@Adityas-MacBook-Air.local>
Date: Tue, 30 Jun 2026 23:23:58 +0530
Subject: [PATCH] fix: resolve Enum default value resolution when parameter
 callbacks are present

---
 tests/test_types.py | 19 +++++++++++++++++++
 typer/main.py       |  2 ++
 2 files changed, 21 insertions(+)

diff --git a/tests/test_types.py b/tests/test_types.py
index db6dae08da..d9bb824c83 100644
--- a/tests/test_types.py
+++ b/tests/test_types.py
@@ -163,3 +163,22 @@ def test_list_pair() -> None:
 def test_float_range_open_bounds_with_clamp_not_allowed():
     with pytest.raises(TypeError, match="Clamping is not supported for open bounds."):
         _click.types.FloatRange(min=0.0, min_open=True, clamp=True)
+
+
+def test_enum_with_callback() -> None:
+    app = typer.Typer()
+
+    class User(str, Enum):
+        rick = "Rick"
+        morty = "Morty"
+
+    def cb(value: User) -> User:
+        return value
+
+    @app.command()
+    def main(user: User = typer.Option(User.rick, callback=cb)) -> None:
+        print(f"Main received: {user.value}")
+
+    result = runner.invoke(app, [])
+    assert result.exit_code == 0
+    assert "Main received: Rick" in result.output
diff --git a/typer/main.py b/typer/main.py
index a825c1b14e..b79a2d0ca3 100644
--- a/typer/main.py
+++ b/typer/main.py
@@ -1446,6 +1446,8 @@ def generate_enum_convertor(enum: type[Enum]) -> Callable[[Any], Any]:
     val_map = {str(val.value): val for val in enum}
 
     def convertor(value: Any) -> Any:
+        if isinstance(value, enum):
+            return value
         if value is not None:
             val = str(value)
             if val in val_map: