[clang] [clang-tools-extra] [llvm] [clang] Introduce diagnostics suppression mappings (PR #112517)

[kadir çetinkaya via cfe-commits]

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@@ -946,6 +952,13 @@ class DiagnosticsEngine : public RefCountedBase<DiagnosticsEngine> {
     return (Level)Diags->getDiagnosticLevel(DiagID, Loc, *this);
   }
 
+  /// Diagnostic suppression mappings can be used to ignore diagnostics based on
+  /// the file they occur in.
+  /// These take presumed locations into account, and can still be overriden by
+  /// clang-diagnostics pragmas.
+  void setDiagSuppressionMapping(decltype(DiagSuppressionMapping) Mapping);
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kadircet wrote:

makes sense, restricting the API by taking in a memory-buffer and performing the parsing in DiagnosticsEngine instead.

https://github.com/llvm/llvm-project/pull/112517