DIBuilder: Make header iterator constructor explicit, NFC

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@226775 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/include/llvm/IR/DebugInfo.h b/include/llvm/IR/DebugInfo.h
index 68d86d72a7d1249d38ff57b9cb7bacf751fdd30c..c8c01def08d759d9da5a028e97d1c25476933ec0 100644 (file)
--- a/include/llvm/IR/DebugInfo.h
+++ b/include/llvm/IR/DebugInfo.h
@@ -66,7 +66,7 @@ class DIHeaderFieldIterator
 
 public:
   DIHeaderFieldIterator() {}
-  DIHeaderFieldIterator(StringRef Header)
+  explicit DIHeaderFieldIterator(StringRef Header)
       : Header(Header), Current(Header.slice(0, Header.find('\0'))) {}
   StringRef operator*() const { return Current; }
   const StringRef * operator->() const { return &Current; }
@@ -200,8 +200,10 @@ public:
                          DIHeaderFieldIterator());
   }
 
-  DIHeaderFieldIterator header_begin() const { return getHeader(); }
-  DIHeaderFieldIterator header_end() const { return StringRef(); }
+  DIHeaderFieldIterator header_begin() const {
+    return DIHeaderFieldIterator(getHeader());
+  }
+  DIHeaderFieldIterator header_end() const { return DIHeaderFieldIterator(); }
 
   DIHeaderFieldIterator getHeaderIterator(unsigned Index) const {
     // Since callers expect an empty string for out-of-range accesses, we can't