OK, I got subscript indexing working for matlab

Author: AndreyAPopov

src/+otp/RHS.m

@@ -1,4 +1,4 @@
-classdef RHS   
+classdef RHS < matlab.mixin.indexing.RedefinesParen
     properties (SetAccess = private)
         F
 
@@ -22,6 +22,29 @@
         OnEvent
     end
 
+    methods (Access = protected)
+        function newRHS = parenReference(obj, indexClass)
+            objF   = obj.F;
+            subst.type = '()';
+            subst.subs =  indexClass.Indices;
+            newF = @(t, y) subsref(objF(t, y), subst);
+            newRHS = otp.RHS(newF);
+        end
+
+        function newRHS = parenAssign(~, ~,~)
+            error('');
+        end
+
+        function newRHS = parenListLength(~, ~,~)
+            error('');
+        end
+
+        function newRHS = parenDelete(~, ~,~)
+            error('');
+        end
+    end
+
+
     methods
         function obj = RHS(F, varargin)
             obj.F = F;
@@ -41,14 +64,12 @@
             newRHS = otp.RHS(newF);
         end
 
-        function newRHS = subsref(obj, vs)
-            if vs.type == '.'
-                newRHS = obj.(vs.subs);
-            else
-                objF   = obj.F;
-                newF = @(t, y) subsref(objF(t, y), vs);
-                newRHS = otp.RHS(newF);
-            end
+        function newRHS = cat(obj, other)
+            error('');
+        end
+
+        function newRHS = size(obj)
+            error('');
         end
 
         function opts = odeset(obj, varargin)
@@ -65,5 +86,12 @@
                 'Vectorized', obj.Vectorized, ...
                 varargin{:});
         end
+
+    end
+
+    methods (Static)
+        function newRHS = empty(obj, other)
+            error('');
+        end
     end
 end