Fix dcargs.conf.SuppressFixed bug + test

dcargs/_arguments.py

@@ -297,8 +297,7 @@ def _rule_generate_helptext(
 
     # If the suppress marker is attached, hide the argument.
     if _markers.Suppress in arg.field.markers or (
-        _markers.SuppressFixed in arg.field.markers
-        and _markers.Fixed in arg.field.markers
+        _markers.SuppressFixed in arg.field.markers and lowered.is_fixed()
     ):
         return dataclasses.replace(lowered, help=argparse.SUPPRESS)
 

pyproject.toml

@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "dcargs"
-version = "0.3.18"
+version = "0.3.19"
 description = "Strongly typed, zero-effort CLI interfaces"
 authors = ["brentyi <[email protected]>"]
 include = ["./dcargs/**/*"]

tests/test_helptext.py

@@ -626,7 +626,7 @@ def main(x: Any = Struct()):
     assert "--x.b" not in helptext
 
 
-def test_suppress_fixed():
+def test_suppress_manual_fixed():
     @dataclasses.dataclass
     class Struct:
         a: int = 5
@@ -638,3 +638,17 @@ def main(x: Any = Struct()):
     helptext = _get_helptext(main)
     assert "--x.a" in helptext
     assert "--x.b" not in helptext
+
+
+def test_suppress_auto_fixed():
+    @dataclasses.dataclass
+    class Struct:
+        a: int = 5
+        b: Callable = lambda x: 5
+
+    def main(x: dcargs.conf.SuppressFixed[Any] = Struct()):
+        pass
+
+    helptext = _get_helptext(main)
+    assert "--x.a" in helptext
+    assert "--x.b" not in helptext