-- qw"aaa bbb ccc" --> { "aaa", "bbb", "ccc" }
local function qw(str)
	local out = {}
	for x in str:gmatch"%S+" do
		table.insert(out, x)
	end
	return out
end
-- qw.s"aaa bbb ccc" --> { aaa=true, bbb=true, ccc=true }
local function qws(str)
	local out = {}
	for x in str:gmatch"%S+" do
		out[x] = true
	end
	return out
end
local function qwi(str) return pairs(qws(str)) end
return setmetatable({qw=qw,s=qws,i=qwi},{__call=function(_,...) return qw(...) end})