Frontend: Warn if adoption mode is requested but not supported

2025-12-14 20:36:38 +01:00 · 2025-02-20 23:24:37 +00:00
parent 8dab67bcee
commit 756abb9284
3 changed files with 20 additions and 0 deletions
--- a/lib/Frontend/CompilerInvocation.cpp
+++ b/lib/Frontend/CompilerInvocation.cpp
@@ -831,6 +831,13 @@ static bool ParseEnabledFeatureArgs(LangOptions &Opts, ArgList &Args,
                         /*didYouMean=*/validModeName);
          continue;
        }
+
+        if (!isFeatureAdoptable(*feature)) {
+          Diags.diagnose(SourceLoc(),
+                         diag::feature_does_not_support_adoption_mode,
+                         featureName);
+          continue;
+        }
      } else {
        // `-disable-*-feature` flags do not support a mode specifier.
        Diags.diagnose(SourceLoc(), diag::cannot_disable_feature_with_mode,