--[[ POSIX library for Lua 5.1, 5.2, 5.3 & 5.4. Copyright (C) 2014-2020 Gary V. Vaughan ]] --[[-- Private argument checking helpers. Undocumented internal helpers for strict environment wrapping. @module posix._strict ]] local setfenv = rawget(_G, 'setfenv') or function() end local strict do local ok, _debug = pcall(require, 'std._debug.init') if ok and _debug.strict then ok, strict = pcall(require, 'std.strict.init') end if not ok then strict = function(env) return env end end end return function(env, level) env = strict(env) setfenv(1+(level or 1), env) return env end