Try to fix ODR violation of ErrorInfo::ID

This implements my suggestion to Lang.

llvm-svn: 264360

1 files changed, 3 insertions, 0 deletions

diff --git a/llvm/docs/ProgrammersManual.rst b/llvm/docs/ProgrammersManual.rst
index 37792255937..32145550fe2 100644
--- a/llvm/docs/ProgrammersManual.rst
+++ b/llvm/docs/ProgrammersManual.rst
@@ -342,10 +342,13 @@ that inherits from the ErrorInfo utility:
   public:
     MyError(std::string Msg) : Msg(Msg) {}
     void log(OStream &OS) const override { OS << "MyError - " << Msg; }
+    static char ID;
   private:
     std::string Msg;
   };
 
+  char MyError::ID = 0; // In MyError.cpp
+
   Error bar() {
     if (checkErrorCondition)
       return make_error<MyError>("Error condition detected");