add comment about why experimental features doesn't use choices

wyattscarpenter · wyattscarpenter · commit 80745917a160 · 2025-09-18T00:34:18.000+07:00
diff --git a/mypy/main.py b/mypy/main.py
@@ -1107,6 +1107,8 @@ def add_invertible_flag(
     parser.add_argument(
         "--enable-incomplete-feature",
         action="append",
+        # We can't just use choices= here because we actually accept more than this;
+        # see process_incomplete_features.
         metavar="{" + ",".join(sorted(INCOMPLETE_FEATURES)) + "}",
         help="Enable support of incomplete/experimental features for early preview",
     )

Original file line number	Diff line number	Diff line change
`@@ -1107,6 +1107,8 @@ def add_invertible_flag(`
`1107`	`1107`	`parser.add_argument(`
`1108`	`1108`	`"--enable-incomplete-feature",`
`1109`	`1109`	`action="append",`
	`1110`	`+ # We can't just use choices= here because we actually accept more than this;`
	`1111`	`+ # see process_incomplete_features.`
`1110`	`1112`	`metavar="{" + ",".join(sorted(INCOMPLETE_FEATURES)) + "}",`
`1111`	`1113`	`help="Enable support of incomplete/experimental features for early preview",`
`1112`	`1114`	`)`