pretty/table_type.lua

-- TODO: I don't like to have such tiny modules. Either merge into another
-- module or provide the funtionallity with another approach.

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-- Enum

local enum_metatable = {
	__tostring = function (e)     return 'Enum:' .. e.name or 'Enum: no name' end,
	__concat   = function (a, b)  return tostring(a) .. tostring(b) end,
}

local function enum (t)
	local e = {}
	for _, v in ipairs(t) do
		e[v] = setmetatable({ name = v }, enum_metatable)
	end
	return e
end

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local TABLE_TYPE = enum { 'EMPTY', 'SEQUENCE', 'STRING_MAP', 'PURE_MAP', 'MIXED', 'SET' }

return TABLE_TYPE