feat: add string parameter

src/Engine/Operator/Context.cpp

@@ -49,3 +49,19 @@ enzo::bt::floatT enzo::op::Context::evalFloatParm(const char* parmName, const un
         throw std::runtime_error("Parameter weak ptr invalid");
     }
 }
+
+// TODO: cache value
+enzo::bt::String enzo::op::Context::evalStringParm(const char* parmName, const unsigned int index) const
+{
+    enzo::nt::GeometryOperator& selfOp = networkManager_.getGeoOperator(opId_);
+    std::weak_ptr<prm::Parameter> parameter = selfOp.getParameter(parmName);
+
+    if(auto sharedParm = parameter.lock())
+    {
+        return sharedParm->evalString(index);
+    }
+    else
+    {
+        throw std::runtime_error("Parameter weak ptr invalid");
+    }
+}

src/Engine/Operator/Context.h

@@ -16,6 +16,7 @@ public:
     Context(enzo::nt::OpId opId, enzo::nt::NetworkManager& networkManager);
     enzo::geo::Geometry cloneInputGeo(unsigned int inputIndex);
     bt::floatT evalFloatParm(const char* parmName, const unsigned int index=0) const;
+    bt::String evalStringParm(const char* parmName, const unsigned int index=0) const;
 private:
     enzo::nt::OpId opId_;
     enzo::nt::NetworkManager& networkManager_;

src/Engine/Operator/GeometryOpDef.cpp

@@ -24,6 +24,13 @@ void enzo::nt::GeometryOpDef::setOutputGeometry(unsigned int outputIndex, enzo::
     outputGeometry_[outputIndex] = geometry;
 }
 
+void enzo::nt::GeometryOpDef::throwError(std::string error)
+{
+    std::cerr << "NODE EXCEPTION: " << error << "\n";
+
+}
+
+
 unsigned int enzo::nt::GeometryOpDef::getMinInputs() const
 {
     return opInfo_.minInputs;

src/Engine/Operator/GeometryOpDef.h

@@ -20,6 +20,8 @@ public:
     virtual void cookOp(op::Context context) = 0;
     geo::Geometry& getOutputGeo(unsigned outputIndex);
 
+    void throwError(std::string error);
+
     unsigned int getMinInputs() const;
     unsigned int getMaxInputs() const;
     unsigned int getMaxOutputs() const;