1 files changed, 18 insertions, 3 deletions
diff --git a/cpp.cpp b/cpp.cpp
index b9f405f..4ab3b94 100644
--- a/cpp.cpp
+++ b/cpp.cpp
@@ -21,7 +21,11 @@ using namespace Gram;
 
 namespace fs = std::filesystem;
 
-CPP::CPP(){}
+CPP::CPP()
+{
+ node_eval_map = getNodeEvalMap();
+}
+
 
 CPP::~CPP(){}
 
@@ -295,7 +299,13 @@ bool CPP::childTypesOfNodeMatch(index_t node_id, const std::vector<std::string>&
  return true; // match
 }
 
-//std::unordered_map<std::string, std::function<>>
+
+std::unordered_map<std::string, std::function<std::shared_ptr<std::any>(index_t)>> CPP::getNodeEvalMap()
+{
+ return {
+  { "primary-expression ", [&](index_t index) -> std::shared_ptr<std::any> { return nullptr; }},
+ };
+}
 
 // precondition: stack contains child values c1, ..., cn on top -> to be popped
 // postcondition: stack contains value on top -> to be pushed
@@ -304,9 +314,13 @@ void CPP::getValueOfNode(index_t index)
  size_t num_childs {m_nodes[index].child_ids.size()};
 
  if (mValues.size() < num_childs)
-  throw std::runtime_error("Expected num_childs elements on Values stack at "s + locationOfNode(index));
+  throw std::runtime_error("ICE: Expected num_childs elements on Values stack at "s + locationOfNode(index));
 
+ auto function_it{node_eval_map.find(m_nodes[index].type)};
  std::shared_ptr<std::any> result {nullptr};
+ if (function_it != node_eval_map.end()) {
+  result = function_it->second(index);
+ }
 
  mValues.resize(mValues.size() - num_childs);
 
@@ -316,6 +330,7 @@ void CPP::getValueOfNode(index_t index)
 // pushes result onto stack
 void CPP::getValueOfToken(index_t index)
 {
+ // TODO: also support the other tokens ...
  if (m_tokens[index].type == "literal") {
   FlowGraph::Data data{FlowGraph::MakeConstantInt(stoi(m_tokens[index].value))};
   mValues.push_back(std::make_shared<std::any>(data));