commit a558ee81052830b8a4f2c5491c418c18e2f0ba32
author David Blaikie <dblaikie@gmail.com> Thu May 02 16:30:49 2019 +0000
committer David Blaikie <dblaikie@gmail.com> Thu May 02 16:30:49 2019 +0000
tree 9b3ce4df06c7e0b92692414eb7b153d7d63b9de3
parent 1b29dec05f3cc005d66be9633a85e1fce0883c38

Do not warn on switches over enums that do not use [[maybe_unused]] enumerators

PR36231, [dcl.attr.unused]p3

Reviewers: aaron.ballman

Differential Revision: https://reviews.llvm.org/D61444

llvm-svn: 359800

clang/lib/Sema/SemaStmt.cpp

diff --git a/clang/lib/Sema/SemaStmt.cpp b/clang/lib/Sema/SemaStmt.cpp
index 9055eb7..feb0052 100644
--- a/clang/lib/Sema/SemaStmt.cpp
+++ b/clang/lib/Sema/SemaStmt.cpp
@@ -1162,6 +1162,9 @@
           break;
         }
 
+        if (EI->second->hasAttr<UnusedAttr>())
+          continue;
+
         // Drop unneeded case values
         while (CI != CaseVals.end() && CI->first < EI->first)
           CI++;