From 733ee9925dcc9374964e631e0196ed6facd82fb3 Mon Sep 17 00:00:00 2001
From: Hawtian Wang <twistoy.wang@gmail.com>
Date: Thu, 28 Mar 2024 23:27:07 +0800
Subject: [PATCH] ...

---
 lua/dotvim/libs/.vim-template:*.lua |  4 ++
 lua/dotvim/libs/class.lua           | 73 +++++++++++++++++++++++++++++
 lua/dotvim/libs/init.lua            |  0
 3 files changed, 77 insertions(+)
 create mode 100644 lua/dotvim/libs/.vim-template:*.lua
 create mode 100644 lua/dotvim/libs/class.lua
 create mode 100644 lua/dotvim/libs/init.lua

diff --git a/lua/dotvim/libs/.vim-template:*.lua b/lua/dotvim/libs/.vim-template:*.lua
new file mode 100644
index 00000000..ed2e96fe
--- /dev/null
+++ b/lua/dotvim/libs/.vim-template:*.lua
@@ -0,0 +1,4 @@
+---@class dotvim.libs.%FILE%
+local M = {}
+
+return M
diff --git a/lua/dotvim/libs/class.lua b/lua/dotvim/libs/class.lua
new file mode 100644
index 00000000..b0d1dfc3
--- /dev/null
+++ b/lua/dotvim/libs/class.lua
@@ -0,0 +1,73 @@
+---@class dotvim.libs.class
+local M = {}
+
+---@class dotvim.libs.class.Metatable
+---@field __class__ dotvim.libs.class.Class
+---@field __index table|fun():any
+---@field __newindex fun():any
+---@field __tostring fun():any
+
+---@class dotvim.libs.class.Class
+---@field meta dotvim.libs.class.Metatable
+---@field __super__ dotvim.libs.class.Class
+
+---@param meta? table
+---@return dotvim.libs.class.Class
+function M.new_class(meta)
+  local c = { meta = meta or {} }
+  c.meta.__index = c.meta
+  c.__class__ = c
+  return c
+end
+
+---@param target dotvim.libs.class.Class
+---@param base dotvim.libs.class.Class
+function M.extend_class(target, base)
+  target.__super__ = base
+  local mt = setmetatable({ __index = base }, base)
+  local base_metatable = getmetatable(base)
+  if base_metatable then
+    if type(base_metatable.__index) == "function" then
+      mt.__index = base_metatable.__index
+    end
+    if type(base_metatable.__newindex) == "function" then
+      mt.__newindex = base_metatable.__newindex
+    end
+  end
+  setmetatable(target, mt)
+  setmetatable(target.meta, base.meta)
+
+  if type(base.meta.__tostring) == "function" then
+    target.meta.__tostring = base.meta.__tostring
+  end
+  if type(base.meta.__index) == "function" then
+    target.meta.__index = base.meta.__index
+  end
+  if type(base.meta.__newindex) == "function" then
+    target.meta.__newindex = base.meta.__newindex
+  end
+end
+
+function M.new_instance(class, ...)
+  local instance = setmetatable({}, class.meta)
+  if instance.__init__ then
+    instance:__init__(...)
+  end
+  return instance
+end
+
+function M.instanceof(obj, class)
+  if type(obj) ~= "table" or type(class) ~= "table" then
+    return false
+  end
+  local cls = obj.__class__
+  while cls ~= nil do
+    if cls == class then
+      return true
+    end
+    cls = cls.__super__
+  end
+  return false
+end
+
+return M
diff --git a/lua/dotvim/libs/init.lua b/lua/dotvim/libs/init.lua
new file mode 100644
index 00000000..e69de29b