make genetic value is trait abc

cpp/genetic_value_to_fitness/GeneticValueIsTrait.cc

@@ -28,6 +28,12 @@ class GeneticValueIsTraitTrampoline : public fwdpy11::GeneticValueIsTrait
         PYBIND11_OVERLOAD_PURE(void, fwdpy11::GeneticValueIsTrait, update, pop);
     }
 
+    std::size_t
+    ndim() const
+    {
+        PYBIND11_OVERLOAD_PURE(std::size_t, fwdpy11::GeneticValueIsTrait, ndim);
+    }
+
     std::shared_ptr<fwdpy11::GeneticValueToFitnessMap>
     clone() const override
     // Implementation details from pybind11 issue 1049
@@ -49,7 +55,7 @@ init_GeneticValueIsTrait(py::module& m)
         m, "GeneticValueIsTrait",
         "ABC for functions mapping genetic values representing traits to "
         "fitness.")
-        .def(py::init<std::size_t>(), py::arg("ndim") = 1);
+        .def(py::init<>());
 
     py::class_<fwdpy11::DiploidGeneticValueToFitnessData>(
         m, "DiploidGeneticValueToFitnessData", py::buffer_protocol())

fwdpy11/custom_genetic_value_decorators.py

@@ -3,7 +3,7 @@ def clone(self):
         # create a new object without initializing it
         cloned = cls.__new__(cls)
         # clone C++ state
-        base.__init__(cloned, *args)
+        base.__init__(cloned)
         # clone Python state
         cloned.__dict__.update(self.__dict__)
         return cloned
@@ -19,7 +19,7 @@ def __init__(self, ndim=1):
     def __call__(self, cls):
         from fwdpy11 import GeneticValueIsTrait
 
-        return _make_cloner(cls, GeneticValueIsTrait, self.ndim)
+        return _make_cloner(cls, GeneticValueIsTrait)
 
 
 def genetic_value_noise_default_clone(cls):

fwdpy11/headers/fwdpy11/genetic_value_to_fitness/GSSmo.hpp

@@ -16,7 +16,7 @@ namespace fwdpy11
         std::vector<Optimum> optima;
 
         GSSmo(std::vector<Optimum> optima_)
-            : GeneticValueIsTrait{1}, VS{std::numeric_limits<double>::quiet_NaN()},
+            : GeneticValueIsTrait{}, VS{std::numeric_limits<double>::quiet_NaN()},
               opt{std::numeric_limits<double>::quiet_NaN()}, current_optimum(0),
               optima(std::move(optima_))
         {
@@ -80,6 +80,12 @@ namespace fwdpy11
         {
             return std::make_shared<GSSmo>(optima);
         }
+
+        std::size_t
+        ndim() const override
+        {
+            return 1;
+        }
     };
 } // namespace fwdpy11
 

fwdpy11/headers/fwdpy11/genetic_value_to_fitness/GaussianStabilizingSelection.hpp

@@ -15,12 +15,12 @@ namespace fwdpy11
 
       public:
         explicit GaussianStabilizingSelection(const GSSmo &input)
-            : GeneticValueIsTrait(input.ndim()), pimpl(input.clone())
+            : GeneticValueIsTrait(), pimpl(input.clone())
         {
         }
 
         explicit GaussianStabilizingSelection(const MultivariateGSSmo &input)
-            : GeneticValueIsTrait(input.ndim()), pimpl(input.clone())
+            : GeneticValueIsTrait(), pimpl(input.clone())
         {
         }
 
@@ -41,5 +41,11 @@ namespace fwdpy11
         {
             return this->pimpl->clone();
         }
+
+        std::size_t
+        ndim() const override
+        {
+            return pimpl->ndim();
+        }
     };
 }

fwdpy11/headers/fwdpy11/genetic_value_to_fitness/GeneticValueIsTrait.hpp

@@ -24,31 +24,19 @@
 
 namespace fwdpy11
 {
-    class GeneticValueIsTrait : public GeneticValueToFitnessMap
+    struct GeneticValueIsTrait : public GeneticValueToFitnessMap
     /// Another ABC.  Effectively a type trait
     {
-      private:
-        std::size_t dim;
-
-      public:
-        explicit GeneticValueIsTrait(std::size_t ndim)
-            : GeneticValueToFitnessMap(), dim(ndim)
+        explicit GeneticValueIsTrait() : GeneticValueToFitnessMap()
         {
         }
         virtual ~GeneticValueIsTrait() = default;
         GeneticValueIsTrait(const GeneticValueIsTrait&) = delete;
         GeneticValueIsTrait(GeneticValueIsTrait&&) = default;
         GeneticValueIsTrait& operator=(const GeneticValueIsTrait&) = delete;
         GeneticValueIsTrait& operator=(GeneticValueIsTrait&&) = default;
-        std::size_t
-        ndim() const override
-        {
-            return this->dim;
-        }
 
-        bool
-        is_fitness() const override
-        {
+        bool is_fitness() const final {
             return false;
         }
     };

fwdpy11/headers/fwdpy11/genetic_value_to_fitness/MultivariateGSSmo.hpp

@@ -38,7 +38,7 @@ namespace fwdpy11
         double VW;
 
         MultivariateGSSmo(const std::vector<PleiotropicOptima> &po)
-            : GeneticValueIsTrait{po.empty() ? 0 : po[0].optima.size()}, optima(po),
+            : GeneticValueIsTrait{}, optima(po),
               current_timepoint(0), current_timepoint_optima{},
               VW{std::numeric_limits<double>::quiet_NaN()}
         {