Document ObjCMethodDecl::setMethodParams.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@141216 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/clang/AST/DeclObjC.h b/include/clang/AST/DeclObjC.h
index c05e411..849697a 100644
--- a/include/clang/AST/DeclObjC.h
+++ b/include/clang/AST/DeclObjC.h
@@ -332,9 +332,13 @@
     return param_begin() + getSelector().getNumArgs(); 
   }
 
+  /// \brief Sets the method's parameters and selector source locations.
+  /// If the method is implicit (not coming from source) \arg SelLocs is
+  /// ignored.
   void setMethodParams(ASTContext &C,
                        ArrayRef<ParmVarDecl*> Params,
-                       ArrayRef<SourceLocation> SelLocs);
+                       ArrayRef<SourceLocation> SelLocs =
+                           ArrayRef<SourceLocation>());
 
   // Iterator access to parameter types.
   typedef std::const_mem_fun_t<QualType, ParmVarDecl> deref_fun;