[PATCH] D93701: [clang][cli] NFC: Pass an ignoring DiagnosticsEngine instead of nullptr to ParseDiagnosticArgs

[Duncan P. N. Exon Smith via Phabricator via cfe-commits]

dexonsmith added inline comments.


================
Comment at: clang/lib/Frontend/CompilerInvocation.cpp:1400-1402
 bool clang::ParseDiagnosticArgs(DiagnosticOptions &Opts, ArgList &Args,
-                                DiagnosticsEngine *Diags,
+                                DiagnosticsEngine &Diags,
                                 bool DefaultDiagColor) {
----------------
Instead of this change (and updating callers), I suggest adding:
```
  Optional<DiagnosticsEngine> IgnoredDiags;
  if (!Diags) {
    IgnoredDiags.emplace(new DiagnosticIDs(), new DiagnosticOptions(),
                         new IgnoringDiagConsumer());
    Diags = &*IgnoredDiags;
  }
```



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  https://reviews.llvm.org/D93701/new/

https://reviews.llvm.org/D93701