[llvm-objdump] Add WarningHandler as a member variable. NFC

This can be used to avoid `auto WarningHandler = ...`.
Similar to llvm-readobj.

1 files changed, 5 insertions, 1 deletions

diff --git a/llvm/tools/llvm-objdump/llvm-objdump.h b/llvm/tools/llvm-objdump/llvm-objdump.h
index 9f6a031..7778cf6 100644
--- a/llvm/tools/llvm-objdump/llvm-objdump.h
+++ b/llvm/tools/llvm-objdump/llvm-objdump.h
@@ -18,6 +18,7 @@
 #include "llvm/Support/Compiler.h"
 #include "llvm/Support/DataTypes.h"
 #include "llvm/Support/FormattedStream.h"
+#include <functional>
 #include <memory>
 
 namespace llvm {
@@ -76,8 +77,11 @@ class Dumper {
   const object::ObjectFile &O;
   StringSet<> Warnings;
 
+protected:
+  std::function<Error(const Twine &Msg)> WarningHandler;
+
 public:
-  Dumper(const object::ObjectFile &O) : O(O) {}
+  Dumper(const object::ObjectFile &O);
   virtual ~Dumper() {}
 
   void reportUniqueWarning(Error Err);