lua_shared

Function topointer

Source 
pub unsafe extern "C" fn topointer(
    state: lua_State,
    index: i32,
) -> *const c_void
Expand description

Converts the value at the given acceptable index to a generic C pointer (void*). The value can be a userdata, a table, a thread, or a function; otherwise, topointer (lua_topointer) returns NULL. Different objects will give different pointers. There is no way to convert the pointer back to its original value.

Typically this function is used only for debug information.