From f0f7a8f7fd237d1f8e2bab2bfb2cb4442e1a692f Mon Sep 17 00:00:00 2001
From: Roland Reichwein <mail@reichwein.it>
Date: Sat, 7 Nov 2020 15:05:45 +0100
Subject: Add node map

---
 cpp.cpp                  | 21 ++++++++++++++++++---
 cpp.h                    |  7 ++++++-
 flowgraph/node.h         |  2 +-
 tests/test-flowgraph.cpp |  1 +
 4 files changed, 26 insertions(+), 5 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));
diff --git a/cpp.h b/cpp.h
index ce4a516..2594a4c 100644
--- a/cpp.h
+++ b/cpp.h
@@ -53,7 +53,12 @@ private:
  std::string typeOfChild(int32_t child_id) const;
  bool childTypesOfNodeMatch(index_t, const std::vector<std::string>& pattern) const; ///< returns true iff specified type list matches; "" -> don't care
 
- std::deque<std::shared_ptr<std::any>> mValues;
+ std::deque<std::shared_ptr<std::any>> mValues; // values stack during phase 7.c
+
+ std::unordered_map<std::string, std::function<std::shared_ptr<std::any>(index_t)>> getNodeEvalMap();
+ std::unordered_map<std::string, std::function<std::shared_ptr<std::any>(index_t)>> node_eval_map;
+
+ CPPContext mContext;
  void getValueOfToken(index_t index);
  void getValueOfNode(index_t index);
  void visitRecursive(index_t node_id);
diff --git a/flowgraph/node.h b/flowgraph/node.h
index 40846e2..aa9d333 100644
--- a/flowgraph/node.h
+++ b/flowgraph/node.h
@@ -17,7 +17,7 @@ namespace FlowGraph {
  class Node
  {
  public:
-  virtual ~Node() {}; // force class to be polymorphic
+  virtual ~Node() {}; // force class to be polymorphic (e.g. in a container)
  };
  
  // Memory on Heap: new and delete
diff --git a/tests/test-flowgraph.cpp b/tests/test-flowgraph.cpp
index 132af4b..f0cc204 100644
--- a/tests/test-flowgraph.cpp
+++ b/tests/test-flowgraph.cpp
@@ -48,3 +48,4 @@ TEST_F(FlowGraphTest, build_graph) {
  graph.push_back(malloc1);
  graph.push_back(free1);
 }
+
-- 
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