1 files changed, 19 insertions, 0 deletions
diff --git a/core/compat.lua b/core/compat.lua
new file mode 100644
index 00000000..245233b3
--- /dev/null
+++ b/core/compat.lua
@@ -0,0 +1,19 @@
+-- Copyright 2007-2011 Mitchell mitchell<att>caladbolg.net. See LICENSE.
+
+-- When using LuaJIT try to retain backwards compatibility (Lua 5.1).
+-- LuaJIT is compiled with LUAJIT_ENABLE_LUA52COMPAT for some Lua 5.2 features.
+
+-- In Lua 5.1, `xpcall` did not accept function arguments.
+local xpcall51 = xpcall
+function xpcall(f, error, ...)
+  local args = {...}
+  return xpcall51(function() f(unpack(args)) end, error)
+end
+
+-- In Lua 5.1, `load` did not take mode and environment parameters.
+local load51 = load
+function load(ld, source, mode, env)
+  local f, err = load51(ld, source)
+  if f and env then return setfenv(f, env) end
+  return f, err
+end