Adding a const overload of DesignatedInitExpr::getDesignator().

llvm-svn: 304000

clang/include/clang/AST/Expr.h

@@ -4284,6 +4284,9 @@ public:
   }
 
   Designator *getDesignator(unsigned Idx) { return &designators()[Idx]; }
+  const Designator *getDesignator(unsigned Idx) const {
+    return &designators()[Idx];
+  }
 
   void setDesignators(const ASTContext &C, const Designator *Desigs,
                       unsigned NumDesigs);