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--!The Make-like Build Utility based on Lua
--
-- XMake is free software; you can redistribute it and/or modify
-- it under the terms of the GNU Lesser General Public License as published by
-- the Free Software Foundation; either version 2.1 of the License, or
-- (at your option) any later version.
--
-- XMake is distributed in the hope that it will be useful,
-- but WITHOUT ANY WARRANTY; without even the implied warranty of
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-- GNU Lesser General Public License for more details.
--
-- You should have received a copy of the GNU Lesser General Public License
-- along with XMake;
-- If not, see <a href="http://www.gnu.org/licenses/"> http://www.gnu.org/licenses/</a>
--
-- Copyright (C) 2015 - 2016, ruki All rights reserved.
--
-- @author ruki
-- @file ipairs.lua
--
-- load modules
local table = require("base/table")
-- ipairs
--
-- .e.g
--
-- @code
--
-- for idx, val in ipairs({"a", "b", "c", "d", "e", "f"}) do
-- print("%d %s", idx, val)
-- end
--
-- for idx, val in ipairs({"a", "b", "c", "d", "e", "f"}, function (v) return v:upper() end) do
-- print("%d %s", idx, val)
-- end
--
-- for idx, val in ipairs({"a", "b", "c", "d", "e", "f"}, function (v, a, b) return v:upper() .. a .. b end, "a", "b") do
-- print("%d %s", idx, val)
-- end
--
-- @endcode
function sandbox_ipairs(t, filter, ...)
-- has filter?
local has_filter = type(filter) == "function"
-- init iterator
local args = {...}
local iter = function (t, i)
i = i + 1
local v = t[i]
if v then
if has_filter then
v = filter(v, unpack(args))
end
return i, v
end
end
-- return iterator and initialized state
return iter, table.wrap(t), 0
end
-- load module
return sandbox_ipairs
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