| 1322 | |
| 1323 | |
| 1324 | static void retstat (LexState *ls) { |
| 1325 | /* stat -> RETURN explist */ |
| 1326 | FuncState *fs = ls->fs; |
| 1327 | expdesc e; |
| 1328 | int first, nret; /* registers with returned values */ |
| 1329 | luaX_next(ls); /* skip RETURN */ |
| 1330 | if (block_follow(ls->t.token) || ls->t.token == ';') |
| 1331 | first = nret = 0; /* return no values */ |
| 1332 | else { |
| 1333 | nret = explist1(ls, &e); /* optional return values */ |
| 1334 | if (hasmultret(e.k)) { |
| 1335 | luaK_setmultret(fs, &e); |
| 1336 | if (e.k == VCALL && nret == 1) { /* tail call? */ |
| 1337 | SET_OPCODE(getcode(fs,&e), OP_TAILCALL); |
| 1338 | lua_assert(GETARG_A(getcode(fs,&e)) == fs->nactvar); |
| 1339 | } |
| 1340 | first = fs->nactvar; |
| 1341 | nret = LUA_MULTRET; /* return all values */ |
| 1342 | } |
| 1343 | else { |
| 1344 | if (nret == 1) /* only one single value? */ |
| 1345 | first = luaK_exp2anyreg(fs, &e); |
| 1346 | else { |
| 1347 | luaK_exp2nextreg(fs, &e); /* values must go to the `stack' */ |
| 1348 | first = fs->nactvar; /* return all `active' values */ |
| 1349 | lua_assert(nret == fs->freereg - first); |
| 1350 | } |
| 1351 | } |
| 1352 | } |
| 1353 | luaK_ret(fs, first, nret); |
| 1354 | } |
| 1355 | |
| 1356 | |
| 1357 | static int statement (LexState *ls) { |
no test coverage detected