HsLua.Core.Userdata

Creates a new userdata wrapping the given Haskell object. The userdata is pushed to the top of the stack.

Creates and registers a new metatable for a userdata-wrapped Haskell value; checks whether a metatable of that name has been registered yet and uses the registered table if possible.

Returns True if a new metatable was created, and False otherwise.

Using a metatable created by this functions ensures that the pointer to the Haskell value will be freed when the userdata object is garbage collected in Lua.

The name may not contain a nul character.

Retrieves a Haskell object from userdata at the given index. The userdata must have the given name.

Replaces the Haskell value contained in the userdata value at index. Checks that the userdata is of type name and returns True on success, or False otherwise.