Initial commit

lua/cave/enum.lua

@@ -0,0 +1,23 @@
+local Meta = require "cave.meta"
+local validate = Meta.validate
+local Map = Meta.Map
+local Str = Meta.String
+
+---@class cave.Enum
+local Enum = {}
+Enum.__index = Enum
+
+---@param tbl table<string, string>
+---@param name string
+function Enum.new(tbl, name)
+  validate {
+    tbl = { tbl, Map(Str, Str) },
+    name = { name, Str },
+  }
+  for key, value in pairs(tbl) do
+    assert(key == value)
+  end
+  setmetatable(tbl, { __meta = Meta.Enum(tbl, name) })
+end
+
+return Enum