[clang] a32feed - Add a static_assert confirming that DiagnosticBuilder is small

[Reid Kleckner via cfe-commits]

Author: Reid Kleckner
Date: 2020-09-24T16:38:41-07:00
New Revision: a32feed0dbeac7606d042d0d7e041c9eaf12cd51

URL: https://github.com/llvm/llvm-project/commit/a32feed0dbeac7606d042d0d7e041c9eaf12cd51
DIFF: https://github.com/llvm/llvm-project/commit/a32feed0dbeac7606d042d0d7e041c9eaf12cd51.diff

LOG: Add a static_assert confirming that DiagnosticBuilder is small

Added: 
    

Modified: 
    clang/lib/Basic/Diagnostic.cpp

Removed: 
    


################################################################################
diff  --git a/clang/lib/Basic/Diagnostic.cpp b/clang/lib/Basic/Diagnostic.cpp
index 661eabf9bc7c..c98fa6ebf817 100644
--- a/clang/lib/Basic/Diagnostic.cpp
+++ b/clang/lib/Basic/Diagnostic.cpp
@@ -40,6 +40,9 @@
 
 using namespace clang;
 
+static_assert(sizeof(DiagnosticBuilder) <= 2 * sizeof(void *),
+              "DiagnosticBuilder should be small, see class doc comments");
+
 const DiagnosticBuilder &clang::operator<<(const DiagnosticBuilder &DB,
                                            DiagNullabilityKind nullability) {
   StringRef string;