3.4.6 – Concatenation The string concatenation operator in Lua is denoted by two dots ('..'). If both operands are strings or numbers, then they are converted to strings according

3.3.4 – Control Structures The control structures if, while, and repeat have the usual meaning and familiar syntax: stat ::=

lua_upvalueid[-0, +0, –] void *lua_upvalueid (lua_State *L, int funcindex, int n); Returns a unique identifier

lua_getupvalue[-0, +(0|1), –] const char *lua_getupvalue (lua_State *L, int funcindex, int n); Gets information

lua_newthread[-0, +1, m] lua_State *lua_newthread (lua_State *L); Creates a new thread, pushes

lua_sethook[-0, +0, –] void lua_sethook (lua_State *L, lua_Hook f, int mask, int count); Sets the debugging

luaL_newmetatable[-0, +1, m] int luaL_newmetatable (lua_State *L, const char *tname); If the registry

lua_pushcclosure[-n, +1, m] void lua_pushcclosure (lua_State *L, lua_CFunction fn, int n); Pushes

lua_pcallk[-(nargs + 1), +(nresults|1), –] int lua_pcallk (lua_State *L, int nargs,

lua_Reader typedef const char * (*lua_Reader) (lua_State *L, void *data,