debug.setuservalue (udata, value) Sets the given value as the Lua value associated to the given udata. udata must be a full userdata.

3.4.5 – Logical Operators The logical operators in Lua are and, or, and not. Like the control structures (see

luaL_traceback[-0, +1, m] void luaL_traceback (lua_State *L, lua_State *L1, const char *msg,

lua_isboolean[-0, +0, –] int lua_isboolean (lua_State *L, int index); Returns 1 if the value at the given

lua_getglobal[-0, +1, e] int lua_getglobal (lua_State *L, const char *name); Pushes onto the stack

luaL_tolstring[-0, +1, e] const char *luaL_tolstring (lua_State *L, int idx, size_t *len); Converts

3.4.2 – Bitwise Operators Lua supports the following bitwise operators: &: bitwise AND |: bitwise OR ~:

lua_isnone[-0, +0, –] int lua_isnone (lua_State *L, int index); Returns 1 if the given index is not valid

collectgarbage ([opt [, arg]]) This function is a generic interface to the garbage collector. It performs different functions according to its first argument, opt:

luaL_gsub[-0, +1, m] const char *luaL_gsub (lua_State *L, const char *s,