Mark ImmutableMap::remove/add() const.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169629 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/include/llvm/ADT/ImmutableMap.h b/include/llvm/ADT/ImmutableMap.h
index ce27d0536a5ac03c46b3af04ac283d1b17fcb54e..f9baec213a6eae70526261b0629a90ccf4e16bc5 100644 (file)
--- a/include/llvm/ADT/ImmutableMap.h
+++ b/include/llvm/ADT/ImmutableMap.h
@@ -333,12 +333,12 @@ public:
     if (Root) Root->release();
   }
 
-  ImmutableMapRef add(key_type_ref K, data_type_ref D) {
+  ImmutableMapRef add(key_type_ref K, data_type_ref D) const {
     TreeTy *NewT = Factory->add(Root, std::pair<key_type, data_type>(K, D));
     return ImmutableMapRef(NewT, Factory);
   }
 
-  ImmutableMapRef remove(key_type_ref K) {
+  ImmutableMapRef remove(key_type_ref K) const {
     TreeTy *NewT = Factory->remove(Root, K);
     return ImmutableMapRef(NewT, Factory);
   }