feat(furvm): expose the stack

furvm/include/furvm/executor.hpp

@@ -150,6 +150,8 @@ public:
     thing<>& top_thing();
 
     const thing<>& top_thing() const;
+
+    const std::vector<thing<>>& stack() const { return m_stack; }
 public:
     /**
      * @brief Stores a thing in a frame variable.
@@ -192,7 +194,7 @@ private:
     context*       m_context;
 
     std::stack<frame>    m_frames;
-    std::stack<thing<>> m_stack;
+    std::vector<thing<>> m_stack;
 
     new_frame_callback m_newFrameCb = nullptr;
 };

furvm/src/executor.cpp

@@ -140,28 +140,28 @@ struct executor::frame executor::top_frame() const {
 }
 
 thing<>& executor::push_thing(thing<>&& thing) {
-    return m_stack.emplace(std::move(thing));
+    return m_stack.emplace_back(std::move(thing));
 }
 
 thing<>& executor::push_thing(const thing<>& thing) {
-    return m_stack.emplace(thing);
+    return m_stack.emplace_back(thing);
 }
 
 thing<> executor::pop_thing() {
     if (m_frames.top().stackBase >= m_stack.size()) throw stack_underflow();
-    auto top = std::move(m_stack.top());
-    m_stack.pop();
+    auto top = std::move(m_stack.back());
+    m_stack.pop_back();
     return std::move(top);
 }
 
 thing<>& executor::top_thing() {
     if (m_frames.top().stackBase >= m_stack.size()) throw stack_underflow();
-    return m_stack.top();
+    return m_stack.back();
 }
 
 const thing<>& executor::top_thing() const {
     if (m_frames.top().stackBase >= m_stack.size()) throw stack_underflow();
-    return m_stack.top();
+    return m_stack.back();
 }
 
 void executor::store_thing(variable_t variable, const thing<>& thing) {