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--[[
Option fragment module for Alpine Wall
Copyright (C) 2012 Kaarle Ritvanen
See LICENSE file for license details
]]--
module(..., package.seeall)
function combinations(of1, ...)
if #arg == 0 then return of1 end
if not of1 then return combinations(unpack(arg)) end
local of2 = arg[1]
table.remove(arg, 1)
if not of2 then return combinations(of1, unpack(arg)) end
local res = {}
for i, x in ipairs(of1) do
for i, y in ipairs(of2) do
local of = {}
for k, v in pairs(x) do
if k ~= 'opts' then of[k] = v end
end
local match = true
for k, v in pairs(y) do
if k ~= 'opts' then
if of[k] and v ~= of[k] then
match = false
break
end
of[k] = v
end
end
if match then
if x.opts then
if y.opts then of.opts = x.opts..' '..y.opts
else of.opts = x.opts end
else of.opts = y.opts end
table.insert(res, of)
end
end
end
return combinations(res, unpack(arg))
end
function location(of) return of.family..'/'..of.table..'/'..of.chain end
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