-- https://github.com/mah0x211/lua-loadchunk
local load = load
local loadstring = loadstring
local loadfile = loadfile
local setfenv = setfenv
--- constants
local LUA_VERSION = tonumber(string.match(_VERSION, 'Lua (.+)$'))

--- evalstr
-- @param src
-- @param env
-- @param ident
-- @return fn
-- @return err
local function evalstr(src, env, ident)
    if LUA_VERSION > 5.1 then
        return load(src, ident, nil, env)
    else
        local fn, err = loadstring(src, ident)
        if not err and env ~= nil then
            setfenv(fn, env)
        end
        return fn, err
    end
end

--- evalfile
-- @param file
-- @param env
-- @return fn
-- @return err
local function evalfile(file, env)
    if LUA_VERSION > 5.1 then
        return loadfile(file, nil, env)
    else
        local fn, err = loadfile(file)
        if not err and env ~= nil then
            setfenv(fn, env)
        end
        return fn, err
    end
end

return {
    string = evalstr,
    file = evalfile,
}