/* * 944_variant_chain_b95_run — #95: variant-match chain-membership arm * (pass 1b) + structural fallback (c2), BOTH stages fused (cstage * cg_tag_for_variant + wwstage flatvariantidxt are the same route). * Pre-#95 a NAMED struct source that was not pointer-identical to a * NAMED variant fell through every pass and the widen stored tag 0 — * both stages, byte-identical, gate-blind (the worst class on the * board: silent wrong tag on VALID code). * * Row sources are ken's #95 first-position oracle * (.ai/ken-95-oracle.md, probes /tmp/b95/src + kb4/kb5) and rob's * fold spec (.ai/rob-95-spec.md). Reference: harec * tagged_select_subtype P1/P2/P3 (ref/harec/src/types.c:702-739, * :988-1140). * * row | shape (oracle row) | cs/ww * --------------------+-------------------------------------+------ * chain_1lvl_i | kb5_v2s1i HEADLINE: depth-1 ident | * | src base → (void|al0) — was both- | * | wrong-IDENTICAL byte-id tag 0 | 0/0 * chain_2lvl_i | kb95_2lvl_i: ident src depth-2 — | * | the class extends to any depth | 0/0 * chain_deep_src | kb95_deep_src: src ali2 → (void| | * | ali) — chain-direction DOWN | 0/0 * chain_deep_var | kb95_deep_var: src base → (void| | * | ali2) — chain-direction UP | 0/0 * chain_call_bound81 | kb5_v2s1: CALL src 1-lvl — runs | * | 0/0; byte-id waived: pre-existing | * | #81 uninit-local zero-fill asm | * | noise (NO at the #95 base too) | 0/0 * chain_call2_bound81 | kb4_v2_struct2 (#95's original): | * | CALL src 2-lvl — same #81 waiver | 0/0 * chain_amb_loud | kb95_amb: (ali|ali2) over one base, | * | src base — TODAY silently tagged | * | member 0; ≥2 chain hits cannot be | * | disambiguated in the nominal-lossy | * | model (harec nassign≥2 → NULL) — | * | hard-error, twin texts share the | * | experr tail | err/err * chain_amb_srcA/B | src ali / src ali2 into (ali|ali2): | * | pass-1 EXACT fires first (harec P1 | * | short-circuit) — precedence pins, | * | MUST NOT MOVE | 0/0 * nom_str / nom_err | (str|linerr) #218 nominal pins: str | * | src tags str, linerr src tags | * | linerr — MUST NOT MOVE through the | * | new arm | 0/0 * exact_ctl | kb5_v2sE2: exact-match ident | * | control — MUST NOT MOVE | 0/0 * bare_ctl/bare_2lvl | kb4_v2_ctrl / kb4_v2_alias2: pass-2 | * | bare-source controls — MUST NOT | * | MOVE | 0/0 * bare_ambig/2 | kb4_v2_ambig(2): pass-2 ambiguity | * | guards hold their loud texts | err/err * callret_bound277 | kb5_v2sE: CALL src typed-as-alias — | * | ww #277 aggregate-return capability | * | leg, OUT of #95; cells pinned as | * | observed (cs runs, ww loud) | 0/err * unrel_struct | kb95_unrel (c2): ta/tb nominally- | * | unrelated same-layout structs, src | * | ta → (void|tb) — was both-wrong- | * | identical byte-id; harec interning | * | makes dealias(ta)==dealias(tb) → | * | accept, tag tb (types.c:72-81 + | * | :1000-1002) | 0/0 * * K_RUN rows build+run BOTH drivers (exit==want) and assert cstage/ * wwstage asm byte-id. K_RUN_NOID waives byte-id — cite the blocking * task at the row. K_RUN_CS_WWERR: cstage build+run exit==cswant AND * wwstage build FAILS with experr (944_alias_accept_run kind). NNN<950, * self-contained /tmp sources, no imports (944 precedent). */ #include #include #include #include #include #include static int runwait(const char *cmd) { int rc = system(cmd); if (rc == -1) return -1; if (WIFEXITED(rc)) return WEXITSTATUS(rc); return -1; } static int slurp_eq(const char *a, const char *b) { FILE *fa = fopen(a, "rb"); FILE *fb = fopen(b, "rb"); if (!fa || !fb) { if (fa) fclose(fa); if (fb) fclose(fb); return -1; } int rc = 0; for (;;) { int ca = fgetc(fa), cb = fgetc(fb); if (ca != cb) { rc = -1; break; } if (ca == EOF) break; } fclose(fa); fclose(fb); return rc; } #define K_RUN 0 /* build+run BOTH, exits==wants, + byte-id */ #define K_BUILDERR 1 /* build FAILS with experr on BOTH drivers */ #define K_RUN_NOID 2 /* build+run BOTH, exits==wants, byte-id * SKIPPED — cite the blocking task */ #define K_RUN_CS_WWERR 3 /* bound row: cstage build+run exit==cswant; * wwstage build FAILS with experr — cite * the blocking task */ struct row { const char *label; const char *src; int cswant; int wwwant; int kind; const char *experr; }; /* errlog_has — a builderr cell must fail WITH its diagnostic; any other * failure (parse error, crash, hang-kill) is a vacuous reject (940 * precedent). */ static int errlog_has(const char *path, const char *needle) { FILE *f = fopen(path, "rb"); if (!f) return 0; char buf[8192]; size_t got = fread(buf, 1, sizeof buf - 1, f); fclose(f); buf[got] = '\0'; return strstr(buf, needle) != NULL; } static const struct row rows[] = { /* ---- c1: chain-membership graduations (were tag-0 silent) */ { "chain_1lvl_i", "package main;\n" "type base = struct { a: int, b: int };\n" "type al0 = base;\n" "export fn main() i32 = {\n" " let s: base;\n" " s.a = 4; s.b = 9;\n" " let v: (void | al0) = s;\n" " if (!(v is al0)) { return 1; };\n" " return 0;\n" "};\n", 0, 0, K_RUN, NULL }, { "chain_2lvl_i", "package main;\n" "type base = struct { a: int, b: int };\n" "type al0 = base;\n" "type ali = al0;\n" "export fn main() i32 = {\n" " let s: base;\n" " s.a = 4; s.b = 9;\n" " let v: (void | ali) = s;\n" " if (!(v is ali)) { return 1; };\n" " return 0;\n" "};\n", 0, 0, K_RUN, NULL }, { "chain_deep_src", "package main;\n" "type base = struct { a: int, b: int };\n" "type ali = base;\n" "type ali2 = ali;\n" "export fn main() i32 = {\n" " let s: ali2;\n" " s.a = 4; s.b = 9;\n" " let v: (void | ali) = s;\n" " if (!(v is ali)) { return 1; };\n" " return 0;\n" "};\n", 0, 0, K_RUN, NULL }, { "chain_deep_var", "package main;\n" "type base = struct { a: int, b: int };\n" "type ali = base;\n" "type ali2 = ali;\n" "export fn main() i32 = {\n" " let s: base;\n" " s.a = 4; s.b = 9;\n" " let v: (void | ali2) = s;\n" " if (!(v is ali2)) { return 1; };\n" " return 0;\n" "};\n", 0, 0, K_RUN, NULL }, /* CALL-src legs run 0/0; byte-id waived: the mk() frame carries * the pre-existing #81 uninit-local zero-fill asm divergence * (cells were byteid=NO at the #95 base too). */ { "chain_call_bound81", "package main;\n" "type base = struct { a: int, b: int };\n" "type al0 = base;\n" "fn mk() base = {\n" " let s: base;\n" " s.a = 4; s.b = 9;\n" " return s;\n" "};\n" "export fn main() i32 = {\n" " let v: (void | al0) = mk();\n" " if (!(v is al0)) { return 1; };\n" " return 0;\n" "};\n", 0, 0, K_RUN_NOID, NULL }, /* byte-id: task #81 */ { "chain_call2_bound81", "package main;\n" "type base = struct { a: int, b: int };\n" "type al0 = base;\n" "type ali = al0;\n" "fn mk() base = {\n" " let s: base;\n" " s.a = 4; s.b = 9;\n" " return s;\n" "};\n" "export fn main() i32 = {\n" " let v: (void | ali) = mk();\n" " if (!(v is ali)) { return 1; };\n" " return 0;\n" "};\n", 0, 0, K_RUN_NOID, NULL }, /* byte-id: task #81 */ /* ≥2 chain hits — was a SILENT member-0 tag; twin texts share * the experr tail (prefix convention). */ { "chain_amb_loud", "package main;\n" "type base = struct { a: int, b: int };\n" "type ali = base;\n" "type ali2 = ali;\n" "export fn main() i32 = {\n" " let s: base;\n" " s.a = 4; s.b = 9;\n" " let v: (ali | ali2) = s;\n" " if (v is ali) { return 1; };\n" " if (v is ali2) { return 2; };\n" " return 3;\n" "};\n", 0, 0, K_BUILDERR, "source alias chain reaches >=2 variants" }, /* pass-1 EXACT precedence pins: an exact source distinguishes * (ali|ali2) — the chain arm must stay BEHIND pass 1. */ { "chain_amb_srcA", "package main;\n" "type base = struct { a: int, b: int };\n" "type ali = base;\n" "type ali2 = ali;\n" "export fn main() i32 = {\n" " let s: ali;\n" " s.a = 4; s.b = 9;\n" " let v: (ali | ali2) = s;\n" " if (!(v is ali)) { return 1; };\n" " if (v is ali2) { return 2; };\n" " return 0;\n" "};\n", 0, 0, K_RUN, NULL }, { "chain_amb_srcB", "package main;\n" "type base = struct { a: int, b: int };\n" "type ali = base;\n" "type ali2 = ali;\n" "export fn main() i32 = {\n" " let s: ali2;\n" " s.a = 4; s.b = 9;\n" " let v: (ali | ali2) = s;\n" " if (!(v is ali2)) { return 1; };\n" " if (v is ali) { return 2; };\n" " return 0;\n" "};\n", 0, 0, K_RUN, NULL }, /* #218 nominal regression pins (rob §3e): (str | linerr) stays * distinguishable through the new arm. */ { "nom_str", "package main;\n" "type linerr = str;\n" "export fn main() i32 = {\n" " let s: str = \"ok\";\n" " let v: (str | linerr) = s;\n" " if (!(v is str)) { return 1; };\n" " if (v is linerr) { return 2; };\n" " return 0;\n" "};\n", 0, 0, K_RUN, NULL }, { "nom_err", "package main;\n" "type linerr = str;\n" "export fn main() i32 = {\n" " let e: linerr = \"bad\";\n" " let v: (str | linerr) = e;\n" " if (!(v is linerr)) { return 1; };\n" " if (v is str) { return 2; };\n" " return 0;\n" "};\n", 0, 0, K_RUN, NULL }, { "exact_ctl", "package main;\n" "type base = struct { a: int, b: int };\n" "type al0 = base;\n" "type ali = al0;\n" "export fn main() i32 = {\n" " let s: ali;\n" " s.a = 4; s.b = 9;\n" " let v: (void | ali) = s;\n" " if (!(v is ali)) { return 1; };\n" " return 0;\n" "};\n", 0, 0, K_RUN, NULL }, /* ---- pass-2 bare-source controls (the #15 leg stays put) */ { "bare_ctl", "package main;\n" "type vt = struct { a: int };\n" "type stream = *vt;\n" "export fn main() i32 = {\n" " let x: vt;\n" " x.a = 7;\n" " let v: (void | stream) = &x;\n" " if (!(v is stream)) { return 1; };\n" " match (v) {\n" " case let s: stream => { if (s.a != 7) { return 2; }; };\n" " case void => { return 3; };\n" " };\n" " return 0;\n" "};\n", 0, 0, K_RUN, NULL }, { "bare_2lvl", "package main;\n" "type vt = struct { a: int };\n" "type st0 = *vt;\n" "type stream = st0;\n" "export fn main() i32 = {\n" " let x: vt;\n" " x.a = 7;\n" " let v: (void | stream) = &x;\n" " if (!(v is stream)) { return 1; };\n" " match (v) {\n" " case let s: stream => { if (s.a != 7) { return 2; }; };\n" " case void => { return 3; };\n" " };\n" " return 0;\n" "};\n", 0, 0, K_RUN, NULL }, { "bare_ambig", "package main;\n" "type p1 = *i32;\n" "type p2 = *i32;\n" "export fn main() i32 = {\n" " let x: i32 = 7;\n" " let v: (p1 | p2) = &x;\n" " return 0;\n" "};\n", 0, 0, K_BUILDERR, "bare source structurally matches >=2 NAMED variants" }, { "bare_ambig2", "package main;\n" "type b1 = *i32;\n" "type b2 = *i32;\n" "type q1 = b1;\n" "type q2 = b2;\n" "export fn main() i32 = {\n" " let x: i32 = 7;\n" " let v: (q1 | q2) = &x;\n" " return 0;\n" "};\n", 0, 0, K_BUILDERR, "bare source structurally matches >=2 NAMED variants" }, /* ww #277 aggregate-return capability leg — OUT of #95; dual * cells pinned as observed so neither side drifts silently. */ { "callret_bound277", "package main;\n" "type base = struct { a: int, b: int };\n" "type al0 = base;\n" "type ali = al0;\n" "fn mk() ali = {\n" " let s: ali;\n" " s.a = 4; s.b = 9;\n" " return s;\n" "};\n" "export fn main() i32 = {\n" " let v: (void | ali) = mk();\n" " if (!(v is ali)) { return 1; };\n" " return 0;\n" "};\n", 0, 0, K_RUN_CS_WWERR, "deferred #277" }, /* ww: task #277 */ /* ---- c2: structural fallback — was both-wrong-identical * byte-id silent (live metric-1: checkers accept, cgen tagged * 0). harec accepts by interning (one node, tag tb). */ { "unrel_struct", "package main;\n" "type ta = struct { a: int, b: int };\n" "type tb = struct { a: int, b: int };\n" "export fn main() i32 = {\n" " let s: ta;\n" " s.a = 4; s.b = 9;\n" " let v: (void | tb) = s;\n" " if (!(v is tb)) { return 1; };\n" " return 0;\n" "};\n", 0, 0, K_RUN, NULL }, /* ---- c3 (#107): is/as ACCEPTANCE must stay nominal-exact. cgen's * chain/structural tag-synthesis arms widen tag lookup at the WIDEN * site only; the wwstage is/as gate (check.ww:4677) reuses * flatvariantidxt and, pre-c3, the widening leaked into ACCEPTANCE * (cs!=ww) and surfaced the >=2 cgen fatal mid-check. c3 added an * exact-only mode for that caller. These pin BOTH stages REJECTING * (cstage's independent gate check.c:2036 already does; wwstage now * matches it) — NOT a crash for the ambiguity shape. Shared experr * substring "not a variant" (cstage "X is not a variant of (...)", * wwstage "is/as: not a variant of operand (X)"). */ { "isas_chain_reject", "package main;\n" "type base = struct { a: int, b: int };\n" "type ali = base;\n" "fn f(v: (void | ali)) i32 = {\n" " if (v is base) { return 1; };\n" " return 0;\n" "};\n" "export fn main() i32 = { return 0; };\n", 0, 0, K_BUILDERR, "not a variant" }, { "isas_unrel_reject", "package main;\n" "type ta = struct { a: int, b: int };\n" "type tb = struct { a: int, b: int };\n" "fn f(v: (void | tb)) i32 = {\n" " if (v is ta) { return 1; };\n" " return 0;\n" "};\n" "export fn main() i32 = { return 0; };\n", 0, 0, K_BUILDERR, "not a variant" }, { "isas_amb_reject_notcrash", "package main;\n" "type base = struct { a: int, b: int };\n" "type ali = base;\n" "type ali2 = ali;\n" "fn f(v: (ali | ali2)) i32 = {\n" " if (v is base) { return 1; };\n" " return 0;\n" "};\n" "export fn main() i32 = { return 0; };\n", 0, 0, K_BUILDERR, "not a variant" }, /* ---- rob's obligated mixed prim/alias TWIN: union (int | ai) * ai=int, source typed aj=int — under all-variants counting both the * bare `int` variant and `ai` share the int bottom -> the cgen widen * (full mode) hard-errors (harec nassign>=2 -> NULL). Pinned LOUD * BOTH stages (the chain-ambiguity path; #95 deviation-2 ratified). */ { "twin_prim_alias_amb", "package main;\n" "type ai = int;\n" "type aj = int;\n" "export fn main() i32 = {\n" " let s: aj = 7;\n" " let v: (int | ai) = s;\n" " return 0;\n" "};\n", 0, 0, K_BUILDERR, "source alias chain reaches >=2 variants" }, }; static int run_driver(const char *driver, const struct row *r, int i, int expect_err, int want) { char src[96], tmpdir[96], errf[96], cmd[1024]; snprintf(src, sizeof src, "/tmp/vc95_%d_%d.ww", getpid(), i); snprintf(tmpdir, sizeof tmpdir, "/tmp/vc95_%d_d_%d", getpid(), i); snprintf(errf, sizeof errf, "/tmp/vc95_%d_e_%d", getpid(), i); FILE *f = fopen(src, "wb"); if (!f) return -1; fputs(r->src, f); fclose(f); mkdir(tmpdir, 0755); snprintf(cmd, sizeof cmd, "cd %s && timeout 20 %s build %s >/dev/null 2>%s", tmpdir, driver, src, errf); int brc = runwait(cmd); if (expect_err) { int ok = (brc != 0) && (r->experr == NULL || errlog_has(errf, r->experr)); if (!ok) fprintf(stderr, "row[%s]: %s expected loud builderr " "\"%s\" (brc=%d)\n", r->label, driver, r->experr ? r->experr : "", brc); unlink(src); unlink(errf); rmdir(tmpdir); return ok ? 0 : 1; } if (brc != 0) { fprintf(stderr, "row[%s]: build via %s failed\n", r->label, driver); unlink(src); unlink(errf); rmdir(tmpdir); return -1; } const char *base = strrchr(src, '/'); base = base ? base + 1 : src; char outbin[256]; snprintf(outbin, sizeof outbin, "%s/%s", tmpdir, base); char *dot = strrchr(outbin, '.'); if (dot && strcmp(dot, ".ww") == 0) *dot = '\0'; int got = runwait(outbin); unlink(src); unlink(outbin); unlink(errf); rmdir(tmpdir); if (got != want) { fprintf(stderr, "row[%s]: %s exit %d, want %d\n", r->label, driver, got, want); return 1; } return 0; } static int asm_byte_identical(const char *bin, const struct row *r, int i) { char src[96], cs[96], ws[96], cmd[1024]; snprintf(src, sizeof src, "/tmp/vc95_asm_%d_%d.ww", getpid(), i); snprintf(cs, sizeof cs, "/tmp/vc95_asm_%d_%d_c.s", getpid(), i); snprintf(ws, sizeof ws, "/tmp/vc95_asm_%d_%d_w.s", getpid(), i); FILE *f = fopen(src, "wb"); if (!f) return -1; fputs(r->src, f); fclose(f); snprintf(cmd, sizeof cmd, "%s/w6c -o %s %s 2>/dev/null", bin, cs, src); if (runwait(cmd) != 0) { fprintf(stderr, "row[%s]: w6c errored\n", r->label); unlink(src); return -1; } snprintf(cmd, sizeof cmd, "%s/w6c_ww -o %s %s 2>/dev/null", bin, ws, src); if (runwait(cmd) != 0) { fprintf(stderr, "row[%s]: w6c_ww errored\n", r->label); unlink(src); unlink(cs); return -1; } int rc = slurp_eq(cs, ws); if (rc != 0) fprintf(stderr, "row[%s]: cstage vs wwstage asm differs\n", r->label); unlink(src); unlink(cs); unlink(ws); return rc; } int main(void) { const char *bin = getenv("BIN"); if (!bin) bin = "out/bin"; char absbin[2080]; if (bin[0] != '/') { char cwd[1024]; if (getcwd(cwd, sizeof cwd) == NULL) return 1; snprintf(absbin, sizeof absbin, "%s/%s", cwd, bin); bin = absbin; } char cdrv[2120], wdrv[2120]; snprintf(cdrv, sizeof cdrv, "%s/ww", bin); snprintf(wdrv, sizeof wdrv, "%s/ww_ww", bin); int n = (int)(sizeof rows / sizeof rows[0]); int total = 0, fail = 0; for (int i = 0; i < n; i++) { total++; int cs_err = rows[i].kind == K_BUILDERR; if (run_driver(cdrv, &rows[i], i, cs_err, rows[i].cswant) != 0) fail++; } if (access(wdrv, X_OK) == 0) { for (int i = 0; i < n; i++) { total++; int ww_err = rows[i].kind == K_BUILDERR || rows[i].kind == K_RUN_CS_WWERR; if (run_driver(wdrv, &rows[i], i, ww_err, rows[i].wwwant) != 0) fail++; } for (int i = 0; i < n; i++) { if (rows[i].kind != K_RUN) continue; total++; if (asm_byte_identical(bin, &rows[i], i) != 0) fail++; } } if (fail) { fprintf(stderr, "variant_chain_b95: %d/%d checks failed\n", fail, total); return 1; } printf("variant_chain_b95: %d/%d ok\n", total, total); return 0; }