1 files changed, 172 insertions, 0 deletions
diff --git a/src/script.inl b/src/script.inl
new file mode 100644
index 00000000..9e8cc40b
--- /dev/null
+++ b/src/script.inl
@@ -0,0 +1,172 @@
+#pragma once
+#include "script.hpp"
+#include "compat/assert.hpp"
+
+#include <Corrade/Containers/StringView.h>
+
+// ReSharper disable CppDFAUnreachableCode
+
+namespace floormat::detail_Script {
+
+template<typename S, typename Obj>
+concept BaseScript =
+requires (S& script, const std::shared_ptr<Obj>& obj, size_t& i, const Ns& ns)
+{
+    requires std::is_base_of_v<base_script, S>;
+    script.on_init(obj);
+    script.on_update(obj, i, ns);
+    script.on_destroy(obj, script_destroy_reason::COUNT);
+    script.delete_self();
+    script.~S();
+};
+
+template<typename S, typename Obj>
+requires requires ()
+{
+    requires BaseScript<S, Obj>;
+    requires std::is_base_of_v<object, Obj>;
+}
+CORRADE_ALWAYS_INLINE
+void concept_check() {}
+
+} // namespace floormat::detail_Script
+
+namespace floormat {
+
+#define FM_ASSERT_SCRIPT_STATE(new_state) (Script<S, Obj>::_assert_state((new_state), __FILE__, __LINE__))
+
+template <typename S, typename Obj>
+Script<S, Obj>::~Script() noexcept
+{
+    fm_assert(state < script_lifecycle::COUNT);
+    switch (state)
+    {
+    case script_lifecycle::no_init:
+    case script_lifecycle::torn_down:
+        state = (script_lifecycle)(unsigned)-1;
+        break;
+    case script_lifecycle::COUNT:
+        std::unreachable();
+    case script_lifecycle::created:
+    case script_lifecycle::destroying:
+    case script_lifecycle::initializing:
+        fm_abort("invalid state '%s' in script destructor",
+                 base_script::state_name(state).data());
+    }
+}
+
+template <typename S, typename Obj>
+
+Script<S, Obj>::Script(): ptr{nullptr}, state{script_lifecycle::no_init}
+{
+    detail_Script::concept_check<S, Obj>();
+}
+
+template <typename S, typename Obj>
+void Script<S, Obj>::_assert_state(script_lifecycle s, const char* file, int line)
+{
+    if (state != s)
+    {
+        fm_EMIT_DEBUG2("fatal: ",
+                       "invalid state transition from '%s' to '%s'",
+                       base_script::state_name(state).data(),
+                       base_script::state_name(s).data());
+        fm_EMIT_DEBUG("", " in %s:%d", file, line);
+        fm_EMIT_ABORT();
+    }
+}
+
+template <typename S, typename Obj>
+S* Script<S, Obj>::operator->()
+{
+    FM_ASSERT_SCRIPT_STATE(script_lifecycle::created);
+    fm_debug_assert(ptr);
+    return ptr;
+}
+
+template<typename S, typename Obj>
+void Script<S, Obj>::do_create(S* p)
+{
+    fm_assert(p);
+    FM_ASSERT_SCRIPT_STATE(script_lifecycle::no_init);
+    state = script_lifecycle::initializing;
+    ptr = p;
+}
+
+template <typename S, typename Obj>
+void Script<S, Obj>::do_initialize(const std::shared_ptr<Obj>& obj)
+{
+    FM_ASSERT_SCRIPT_STATE(script_lifecycle::initializing);
+    state = script_lifecycle::created;
+    ptr->on_init(obj);
+}
+
+template <typename S, typename Obj>
+void Script<S, Obj>::do_reassign(S* p, const std::shared_ptr<Obj>& obj)
+{
+    fm_assert(p);
+    FM_ASSERT_SCRIPT_STATE(script_lifecycle::created);
+    fm_debug_assert(ptr);
+    ptr->on_destroy(obj, script_destroy_reason::unassign);
+    ptr->delete_self();
+    ptr = p;
+    p->on_init(obj);
+}
+
+template <typename S, typename Obj>
+void Script<S, Obj>::do_destroy_1(const std::shared_ptr<Obj>& obj)
+{
+    FM_ASSERT_SCRIPT_STATE(script_lifecycle::created);
+    state = script_lifecycle::torn_down;
+    ptr->on_destroy(obj, script_destroy_reason::kill);
+    ptr->delete_self();
+    ptr = nullptr;
+}
+
+template <typename S, typename Obj>
+void Script<S, Obj>::do_destroy_pre(const std::shared_ptr<Obj>& obj)
+{
+    FM_ASSERT_SCRIPT_STATE(script_lifecycle::created);
+    state = script_lifecycle::destroying;
+    ptr->on_destroy(obj, script_destroy_reason::quit);
+}
+
+template <typename S, typename Obj>
+void Script<S, Obj>::do_finish_destroy()
+{
+    FM_ASSERT_SCRIPT_STATE(script_lifecycle::destroying);
+    state = script_lifecycle::torn_down;
+    ptr->delete_self();
+    ptr = nullptr;
+}
+
+template <typename S, typename Obj>
+void Script<S, Obj>::do_ensure_torn_down()
+{
+    FM_ASSERT_SCRIPT_STATE(script_lifecycle::torn_down);
+}
+
+template <typename S, typename Obj>
+void Script<S, Obj>::do_error_unwind()
+{
+    fm_assert(state < script_lifecycle::COUNT);
+    switch (state)
+    {
+    using enum script_lifecycle;
+    case COUNT: std::unreachable();
+    case created:
+    case initializing:
+    case destroying:
+        ptr->delete_self();
+        ptr = nullptr;
+        break;
+    case no_init:
+    case torn_down:
+        break;
+    }
+    fm_assert(false);
+}
+
+#undef FM_ASSERT_SCRIPT_STATE
+
+} // namespace floormat