refactor(furvm): add shared pointer aliases

furvm/include/furvm/context.hpp

@@ -4,7 +4,6 @@
 #include "furvm/fwd.hpp"
 #include "furvm/module.hpp"
 
-#include <memory>
 #include <type_traits>
 #include <vector>
 
@@ -48,7 +47,7 @@ public:
      * @param index Index to the module.
      * @return Old value.
      */
-    std::shared_ptr<mod> erase(module_handle index) {
+    mod_p erase(module_handle index) {
         if (index >= m_modules.size()) return nullptr;
         return std::move(m_modules[index]);
     }
@@ -59,7 +58,7 @@ public:
      * @param index Position of the module.
      * @return The module.
      */
-    constexpr std::shared_ptr<mod>& operator[](module_handle index) { return m_modules[index]; }
+    constexpr mod_p& operator[](module_handle index) { return m_modules[index]; }
 
     /**
      * @brief Returns a module of this context.
@@ -67,7 +66,7 @@ public:
      * @param index Position of the module.
      * @return The module.
      */
-    constexpr const std::shared_ptr<mod>& operator[](module_handle index) const { return m_modules[index]; }
+    constexpr const mod_p& operator[](module_handle index) const { return m_modules[index]; }
 
     /**
      * @brief Returns a module of this context.
@@ -75,7 +74,7 @@ public:
      * @param index Position of the module.
      * @return The module.
      */
-    constexpr std::shared_ptr<mod>& at(module_handle index) { return m_modules.at(index); }
+    constexpr mod_p& at(module_handle index) { return m_modules.at(index); }
 
     /**
      * @brief Returns a module of this context.
@@ -83,7 +82,7 @@ public:
      * @param index Position of the module.
      * @return The module.
      */
-    constexpr const std::shared_ptr<mod>& at(module_handle index) const { return m_modules.at(index); }
+    constexpr const mod_p& at(module_handle index) const { return m_modules.at(index); }
 
     /**
      * @brief Returns how many does this context have modules.
@@ -92,9 +91,9 @@ public:
      */
     constexpr size_t size() const { return m_modules.size(); }
 private:
-    std::vector<std::shared_ptr<mod>>      m_modules;
-    std::vector<std::shared_ptr<thing>>    m_things;
-    std::vector<std::shared_ptr<executor>> m_executors;
+    std::vector<mod_p>      m_modules;
+    std::vector<thing_p>    m_things;
+    std::vector<executor_p> m_executors;
 };
 
 } // namespace furvm