Hojun-Cho
83f5956df2
Every section banner dies (103 -> 0) across test/lang, the observer suites, the C carriers, and the five comment-heavy corpus fixtures; banner provenance (#N cites, carrier numbers, repair-cluster labels) folded into headers or adjacent WHY comments. Narration deleted; row provenance, ref cites, divergence pins, and layout contracts kept (fwd-ref decl-order guards and bootstrap-gate corpus rationale restored where the sweep over-cut). Comment-only proven: all 3742 wwbuild workdir .s byte-identical before/after; test-commit and test-byteid (161 lang + 1399 data, 0 pinned-divergent) green.
121 lines
3.4 KiB
Plaintext
121 lines
3.4 KiB
Plaintext
// Project #83: the general N-ary tuple-
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// destructure per-element register-return. The send (N_RETURN) and receive
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// (N_MLET / N_MASSIGN) sites previously gated the 3-word {ptr,len,cap} store
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// on a str-only XOR (e0_is_str ^ e1_is_str), which admitted EXACTLY ONE str
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// element and was slice-BLIND: a tuple with a []u8 element fell to the
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// scalar-pair fallback and silently DROPPED len+cap (only .ptr landed). The
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// fix REPLACES the XOR with a positional per-element cursor (harec
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// create_unpack_bindings, ref/harec/src/check.c:1354-1416): each element rides
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// consecutive eightbytes over [AX,DX,CX,R8]; a slice/str rides its 3-word
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// header, a scalar rides 1. SEND and RECEIVE walk the SAME cursor.
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//
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// Migrated from test/wcc/945_tuple_nary_destructure_run.c. Every wide row has
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// cap!=len so a dropped len OR cap is caught; N_MASSIGN rows pre-poison the
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// destination slot (distinct len/cap via a proven 3-word let-init copy) so a
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// dropped len/cap reads the poison, never the test value. Each []u8 element
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// borrows a str literal's .ptr (stable .rodata). Row F (slice_slice_recv) is
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// the over-cap 6-eightbyte tuple that #10 Fold A sret's at the SEND and Fold B
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// copies out at the RECEIVE — a working round-trip. cstage run is test-lang;
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// cs==ww byte-id is test-lang-byteid (T2) — both dimensions survive.
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package tuple_nary_destructure_test;
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fn mk_mlet_islice() (i64, []u8) = {
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let b: str = "hi";
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let p: []u8; p.ptr = b.ptr; p.len = 2; p.cap = 5;
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return (4i64, p);
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};
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fn mk_massign_islice() (i64, []u8) = {
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let b: str = "hi";
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let p: []u8; p.ptr = b.ptr; p.len = 2; p.cap = 5;
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return (4i64, p);
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};
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fn mk_mlet_istr() (i64, str) = {
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let p: str = "hi"; p.cap = 7i32;
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return (4i64, p);
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};
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fn mk_massign_istr() (i64, str) = {
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let p: str = "hi"; p.cap = 7i32;
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return (4i64, p);
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};
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fn mk_str_control() str = {
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let p: str = "hello"; p.cap = 9i32;
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return p;
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};
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fn mk_massign_blank_wide() ([]u8, i64) = {
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let b: str = "hi";
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let p: []u8; p.ptr = b.ptr; p.len = 2; p.cap = 5;
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return (p, 7i64);
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};
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fn mk_slice_slice_recv() ([]u8, []u8) = {
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let a: []u8; a.len = 1; a.cap = 5;
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let b: []u8; b.len = 2; b.cap = 6;
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return (a, b);
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};
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@test fn mlet_islice() void = {
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let (a, s) = mk_mlet_islice();
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assert(a == 4);
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assert(s.len: i32 == 2);
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assert(s.cap: i32 == 5);
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assert(s[0] == 104u8);
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};
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@test fn massign_islice() void = {
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let qb: str = "zzzz";
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let q: []u8; q.ptr = qb.ptr; q.len = 9; q.cap = 9;
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let a: i64 = 0i64;
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let s: []u8 = q;
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a, s = mk_massign_islice();
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assert(a == 4);
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assert(s.len: i32 == 2);
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assert(s.cap: i32 == 5);
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assert(s[0] == 104u8);
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};
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@test fn mlet_istr() void = {
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let (a, s) = mk_mlet_istr();
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assert(a == 4);
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assert(s.len: i32 == 2);
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assert(s.cap: i32 == 7);
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assert(s[0] == 104u8);
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};
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@test fn massign_istr() void = {
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let q: str = "qqqq"; q.cap = 6i32;
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let a: i64 = 0i64;
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let s: str = q;
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a, s = mk_massign_istr();
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assert(a == 4);
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assert(s.len: i32 == 2);
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assert(s.cap: i32 == 7);
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assert(s[0] == 104u8);
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};
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@test fn str_control() void = {
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let s: str = mk_str_control();
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assert(s.len: i32 == 5);
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assert(s.cap: i32 == 9);
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assert(s[0] == 104u8);
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};
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@test fn massign_blank_wide() void = {
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let a: i64 = 0i64;
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_, a = mk_massign_blank_wide();
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assert(a == 7);
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};
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@test fn slice_slice_recv() void = {
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let (x, y) = mk_slice_slice_recv();
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assert(x.len: i32 == 1);
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assert(x.cap: i32 == 5);
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assert(y.len: i32 == 2);
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assert(y.cap: i32 == 6);
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};
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