Fix build broken by r328090

- constexpr is needed for out-of-class definition of the Type static
  member by some compilers
- MSVC is confused by the initialization of the static constexpr char[]
  member when it happens in a template specialization. Explicitly
  specifying the length of the array seems to be enough to help it
  figure things out.

llvm-svn: 328093

1 files changed, 4 insertions, 4 deletions

diff --git a/llvm/lib/BinaryFormat/Dwarf.cpp b/llvm/lib/BinaryFormat/Dwarf.cpp
index 3a97ddebf8e..dd1ecea1782 100644
--- a/llvm/lib/BinaryFormat/Dwarf.cpp
+++ b/llvm/lib/BinaryFormat/Dwarf.cpp
@@ -676,7 +676,7 @@ bool llvm::dwarf::isValidFormForVersion(Form F, unsigned Version,
   return ExtensionsOk;
 }
 
-const char llvm::dwarf::EnumTraits<Attribute>::Type[];
-const char llvm::dwarf::EnumTraits<Form>::Type[];
-const char llvm::dwarf::EnumTraits<Index>::Type[];
-const char llvm::dwarf::EnumTraits<Tag>::Type[];
+constexpr char llvm::dwarf::EnumTraits<Attribute>::Type[];
+constexpr char llvm::dwarf::EnumTraits<Form>::Type[];
+constexpr char llvm::dwarf::EnumTraits<Index>::Type[];
+constexpr char llvm::dwarf::EnumTraits<Tag>::Type[];