scrooge-generator/src/main/resources/luagen/enum.mustache

{{#docstring}}
--[[
{{docstring}}
--]]
{{/docstring}}

-- Import this file with:
--   require '{{package}}.{{EnumName}}'

local {{EnumName}} = {
{{#values}}
  {{originalName}} = {{value}},
{{/values}}}

local inverseMapping = {}

local lookupById = function(enum_id)
  if not next(inverseMapping) then
    for label, id in pairs({{EnumName}}) do
      inverseMapping[tostring(id)] = label
    end
  end
  return inverseMapping[tostring(enum_id)]
end

setmetatable({{EnumName}}, {
  __index = function(tbl, arg)
    if type(arg) == "number" then
      return lookupById(arg)
    else
      local upper = arg:upper()
      if rawget(tbl, upper) then
        return rawget(tbl, upper)
      else
        error('Key `' .. arg .. '` is not a valid entry in the `{{EnumName}}` enum.')
      end
    end
  end
})

return {{EnumName}}