Re: params to __tostring

[Wesley Smith <wesley.hoke@...>]

> Think for a moment why that wouldn't work -- the \t would only be
> added to the first line of a subtable.

Well, it doesn't take much work to indent a multi-line string:



local function indent(str, amt)
	return str:gsub('\n', '\n'..amt)
end


local meta = {
	__tostring = function(t)
		local res = {}
		for i=1, #t do
			res[i] = string.format("\t%d = %s,", i, tostring(t[i]))
		end
		for k, v in pairs(t) do
			if(type(k) ~= "number") then
				res[#res+1] = indent(string.format("\t%s = %s,", k, tostring(v)), '\t')
			end
		end
		return string.format("{\n%s\n}", table.concat(res, "\n"))
	end
}

local t1 = setmetatable({
	1, 2, 3, "four"
}, meta)
local t2 = setmetatable({
	this = "that",
	one = "two",
}, meta)
t1.t2 = t2


print(tostring(t1))