refactor(furvm): better thing implementation

furvm/src/thing.cpp

@@ -1,10 +1,33 @@
+// NOLINTBEGIN(cppcoreguidelines-no-malloc)
+
 #include "furvm/thing.hpp"
 
+#include "furvm/context.hpp" // IWYU pragma: keep
+
+#include <cstdlib>
+
 namespace furvm {
 
+std::size_t thing_type_size(thing_t type) {
+    switch (type) {
+    case thing_t::Int: return 4;
+    }
+    return 0;
+}
+
 thing::thing(rzecz, thing_handle id, thing_t type, const context_p& context)
-  : m_id(id), m_type(type), m_context(context) {}
+  : m_id(id), m_type(type), m_context(context), m_data(std::calloc(1, thing_type_size(type))) {}
 
-thing::~thing() {}
+thing::~thing() {
+    std::free(m_data);
+}
 
-} // namespace furvm
+thing_p thing::create(const context_p& context, thing_t type) {
+    auto th = std::make_shared<thing>(rzecz{}, context->m_things.size(), type, context);
+    context->m_things.push_back(th);
+    return std::move(th);
+}
+
+} // namespace furvm
+
+// NOLINTEND(cppcoreguidelines-no-malloc)