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-rw-r--r--src/google/protobuf/generated_message_util.h9
1 files changed, 7 insertions, 2 deletions
diff --git a/src/google/protobuf/generated_message_util.h b/src/google/protobuf/generated_message_util.h
index daa16f77..1a2343d4 100644
--- a/src/google/protobuf/generated_message_util.h
+++ b/src/google/protobuf/generated_message_util.h
@@ -38,6 +38,8 @@
#ifndef GOOGLE_PROTOBUF_GENERATED_MESSAGE_UTIL_H__
#define GOOGLE_PROTOBUF_GENERATED_MESSAGE_UTIL_H__
+#include <string>
+
#include <google/protobuf/stubs/common.h>
@@ -66,8 +68,11 @@ namespace internal {
// Constants for special floating point values.
-LIBPROTOBUF_EXPORT double Infinity();
-LIBPROTOBUF_EXPORT double NaN();
+double Infinity();
+double NaN();
+
+// Constant used for empty default strings.
+extern const ::std::string kEmptyString;
} // namespace internal