| 427 | |
| 428 | |
| 429 | static int luaB_newproxy (lua_State *L) { |
| 430 | lua_settop(L, 1); |
| 431 | lua_newuserdata(L, 0); /* create proxy */ |
| 432 | if (lua_toboolean(L, 1) == 0) |
| 433 | return 1; /* no metatable */ |
| 434 | else if (lua_isboolean(L, 1)) { |
| 435 | lua_newtable(L); /* create a new metatable `m' ... */ |
| 436 | lua_pushvalue(L, -1); /* ... and mark `m' as a valid metatable */ |
| 437 | lua_pushboolean(L, 1); |
| 438 | lua_rawset(L, lua_upvalueindex(1)); /* weaktable[m] = true */ |
| 439 | } |
| 440 | else { |
| 441 | int validproxy = 0; /* to check if weaktable[metatable(u)] == true */ |
| 442 | if (lua_getmetatable(L, 1)) { |
| 443 | lua_rawget(L, lua_upvalueindex(1)); |
| 444 | validproxy = lua_toboolean(L, -1); |
| 445 | lua_pop(L, 1); /* remove value */ |
| 446 | } |
| 447 | luaL_argcheck(L, validproxy, 1, "boolean or proxy expected"); |
| 448 | lua_getmetatable(L, 1); /* metatable is valid; get it */ |
| 449 | } |
| 450 | lua_setmetatable(L, 2); |
| 451 | return 1; |
| 452 | } |
| 453 | |
| 454 | |
| 455 | static const luaL_Reg base_funcs[] = { |
nothing calls this directly
no test coverage detected