refactor(furvm): add id to module

furvm/include/furvm/context.hpp

@@ -36,11 +36,10 @@ public:
      * @param args Arguments to forward to module's constructor.
      * @return An index to the emplaced module.
      */
-    template <typename... Args, typename = std::enable_if_t<std::is_constructible_v<mod, Args...>>>
+    template <typename... Args, typename = std::enable_if_t<std::is_constructible_v<mod, module_handle, Args...>>>
-    constexpr module_index emplace(Args&&... args) {
+    constexpr const auto& emplace(Args&&... args) {
-        module_index index = m_modules.size();
+        module_handle id = static_cast<module_handle>(m_modules.size());
-        m_modules.emplace_back(std::make_unique<mod>(std::forward<Args>(args)...));
+        return m_modules.emplace_back(std::make_unique<mod>(id, std::forward<Args>(args)...));
-        return index;
     }
 
     /**
@@ -49,7 +48,7 @@ public:
      * @param index Index to the module.
      * @return Old value.
      */
-    value_type erase(module_index index) {
+    value_type erase(module_handle index) {
         if (index >= m_modules.size()) return nullptr;
         return std::move(m_modules[index]);
     }
@@ -60,7 +59,7 @@ public:
      * @param index Position of the module.
      * @return The module.
      */
-    constexpr value_type& operator[](module_index index) { return m_modules[index]; }
+    constexpr value_type& operator[](module_handle index) { return m_modules[index]; }
 
     /**
      * @brief Returns a module of this context.
@@ -68,7 +67,7 @@ public:
      * @param index Position of the module.
      * @return The module.
      */
-    constexpr const value_type& operator[](module_index index) const { return m_modules[index]; }
+    constexpr const value_type& operator[](module_handle index) const { return m_modules[index]; }
 
     /**
      * @brief Returns a module of this context.
@@ -76,7 +75,7 @@ public:
      * @param index Position of the module.
      * @return The module.
      */
-    constexpr value_type& at(module_index index) { return m_modules.at(index); }
+    constexpr value_type& at(module_handle index) { return m_modules.at(index); }
 
     /**
      * @brief Returns a module of this context.
@@ -84,7 +83,7 @@ public:
      * @param index Position of the module.
      * @return The module.
      */
-    constexpr const value_type& at(module_index index) const { return m_modules.at(index); }
+    constexpr const value_type& at(module_handle index) const { return m_modules.at(index); }
 
     /**
      * @brief Returns how many does this context have modules.

furvm/include/furvm/fwd.hpp

@@ -59,7 +59,7 @@ class mod;
 /**
  * @brief Furvm module's index.
  */
-using module_index = std::size_t;
+using module_handle = std::uint32_t;
 
 // context.hpp
 

furvm/include/furvm/module.hpp

@@ -14,11 +14,12 @@ public:
     /**
      * @brief Construct a new module.
      *
+     * @param id Id of this module.
      * @param args Arguments to forward to bytecode's constructor.
      */
     template <typename... Args, typename = std::enable_if_t<std::is_constructible_v<bytecode_t, Args...>>>
-    mod(Args&&... args)
+    mod(module_handle id, Args&&... args)
-      : m_bytecode(std::forward<Args>(args)...) {}
+      : m_id(id), m_bytecode(std::forward<Args>(args)...) {}
 
     ~mod() = default;
 
@@ -34,8 +35,16 @@ public:
 
     mod(const mod&)            = delete;
     mod& operator=(const mod&) = delete;
+public:
+    /**
+     * @brief Returns an id of this module.
+     *
+     * @return The id.
+     */
+    constexpr module_handle id() const { return m_id; }
 private:
-    bytecode_t m_bytecode;
+    module_handle m_id;
+    bytecode_t    m_bytecode;
 };
 
 } // namespace furvm

furvm/src/main.cpp

@@ -13,7 +13,7 @@ static constexpr std::array<furvm::byte, 1> s_bytecode = {
 int main(void) {
     furvm::context context;
 
-    auto mainModule = context.emplace(s_bytecode.begin(), s_bytecode.end());
+    const auto& mainModule = context.emplace(s_bytecode.begin(), s_bytecode.end());
 
     return 0;
 }