Function luaL_optnumber

third-party/lua-5.4.6/src/lauxlib.c:432–434

LUALIB_API lua_Number luaL_optnumber (lua_State *L, int arg, lua_Number def) {
  return luaL_opt(L, luaL_checknumber, arg, def);
}


static void interror (lua_State *L, int arg) {