245 indexed read in plural envelope and nested

✓ Passing This code compiles and runs correctly.

Code

// PINS: a handle-addressed READ survives both places it used to be dropped —
// inside a MULTI-FIELD envelope, and inside another indexed read's INDEX.
//
// Two defects, one shape, found together by trying to walk an intrusive chain.
//
//   (1) `stored` has TWO lowerings. A row-addressed envelope and the
//       single-write path both ran the full expression lowering; the
//       non-row-addressed plural envelope ran only its OWN store's rewrite, so
//       a value reading any other store — or reading one through a handle at
//       all — reached the host verbatim as `cells[...]`. One field worked and
//       two did not, which is the tell for a second lowering rather than a
//       missing feature.
//
//   (2) `indexedFieldRefs` consumed the whole matched span, so an indexed read
//       sitting INSIDE another one's index was never visited. That is exactly
//       one hop along a chain — `cells[cells[h].next].v` — and it is the shape
//       any linked structure is walked with.
//
// The consumer's spelling, not the minimal one: three rows chained at insert
// (`| row` is the only place a handle is minted), then walked THREE hops deep
// through a plural envelope. Handles are opaque and branded, so the oracle is
// the values they reach, never the handle numbers.
//
// Found writing the ECS benchmark's spatial grid: an intrusive bucket chain
// needs no nested collections, no positional addressing and no new verb — only
// these two reads. What it still lacks is a way to name the handle of the row a
// SWEEP is visiting; `[id]` is refused-and-named by the request block today.
import std/io
import std/store

std/store:new(cells, capacity: 8) { v: i64, next: -1[i64] }
std/store:new(head) { h: -1[i64] }
std/store:new(probe) { v1: 0[i64], v2: 0[i64], v3: 0[i64] }

std/store:insert(cells) { v: 10, next: -1 }
| row a |> std/store:stored { head.h: a }
| full |> _

std/store:insert(cells) { v: 20, next: head.h }
| row b |> std/store:stored { head.h: b }
| full |> _

std/store:insert(cells) { v: 30, next: head.h }
| row c |> std/store:stored { head.h: c }
| full |> _

// Multi-field envelope, and the second field is a NESTED indexed read.
std/store:stored { probe.v1: cells[head.h].v, probe.v2: cells[cells[head.h].next].v }

// Three hops — the nesting recurses, it does not merely survive one level.
std/store:stored { probe.v3: cells[cells[cells[head.h].next].next].v }

std/io:print.ln("hop1 {{ probe.v1:d }} hop2 {{ probe.v2:d }} hop3 {{ probe.v3:d }}")

input.k

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hop1 30 hop2 20 hop3 10

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static class main_module {
  public static void __koru_stdout_write(dynamic s) => global::System.Console.Out.Write(s);
  public static void __koru_stderr_write(dynamic s) => global::System.Console.Error.Write(s);
  // The mutable handle carrier — `*String`-style resources are
  // `new __KoruBox { data = … }` because C# anonymous types are
  // read-only: `s.data = …` (std/string append/clear, handle
  // mutation generally) needs a settable member.
  public class __KoruBox { public dynamic data; }
  // Textification for `{{ … }}` operands: C# bool ToStrings as
  // `True` where Koru prints `true`, and the operand's static type
  // is unknown at this boundary — a `(x) is bool` inline test would
  // be a compile error on statically-typed operands instead. Generic
  // on purpose: `dynamic` boxed every value-type operand — measured
  // ~1s/10M elements on 012_threat_scanner — while T specializes to
  // the operand's own ToString() with no box.
  public static string __koru_str<T>(T v) => v is bool b ? (b ? "true" : "false") : v?.ToString();
  // std/store: plural store 'cells' created (SoA cell + insert/query/write/take/stripe units); fields v: i64, next: i64
  // std/store: 'head' created (cell + write-subflow at module scope); fields h: i64
  // std/store: 'probe' created (cell + write-subflow at module scope); fields v1: i64, v2: i64, v3: i64
  static class __koru_store_cells {
    public static long[] v = new long[8];
    public static dynamic __koru_read_v(long __h) { long __r = __koru_resolve(__h); return v[(int)__r]; }
    public static long[] next = new long[8];
    public static dynamic __koru_read_next(long __h) { long __r = __koru_resolve(__h); return next[(int)__r]; }
    public static long len = 0;
    public static long[] __koru_hslot_row = new long[8];
    public static long[] __koru_hslot_gen = new long[8];
    public static long[] __koru_row_hslot = new long[8];
    public static long[] __koru_hslot_free = new long[8];
    public static long __koru_hslot_free_len = 0;
    public static long __koru_hslot_next = 0;
    public static long __koru_brand = 1;
    public static bool __koru_ident = true;
    public static bool __koru_gen0 = true;
    public static void __koru_materialize() {
        if (!__koru_ident) return;
        for (long __i = 0; __i < len; __i++) { __koru_hslot_row[__i] = __i; __koru_row_hslot[__i] = __i; }
        __koru_ident = false;
    }
    public static long __koru_row_of(long h) {
        if (h < 0) return -1;
        ulong __u = (ulong)h;
        long __slot32 = (long)(__u & 0xFFFFFFFFUL);
        if ((__slot32 >> 24) != __koru_brand) return -1;
        long __slot = __slot32 & 0xFFFFFF;
        if (__slot >= __koru_hslot_next) return -1;
        if (__koru_gen0) { if ((__u >> 32) != 0) return -1; return __slot; }
        if ((long)(__u >> 32) != __koru_hslot_gen[__slot]) return -1;
        if (__koru_ident) return __slot;
        long __r = __koru_hslot_row[__slot];
        if (__r >= len) return -1;
        return __r;
    }
    public static long __koru_resolve(long h) {
        if (h >= 0) {
            ulong __u = (ulong)h;
            long __slot32 = (long)(__u & 0xFFFFFFFFUL);
            if ((__slot32 >> 24) != __koru_brand) throw new global::System.Exception("std/store: 'cells[...]' does not address a row - the value is not a handle this store issued (handles come from `| row` and row cursors)");
            long __slot = __slot32 & 0xFFFFFF;
            if (__koru_gen0) {
                if ((__u >> 32) != 0 && __slot < __koru_hslot_next) throw new global::System.Exception("std/store: stale row handle into store 'cells' - the row it addressed was removed (stale-handle trap pinned at 690_115)");
            } else if (__slot < __koru_hslot_next && (long)(__u >> 32) != __koru_hslot_gen[__slot]) throw new global::System.Exception("std/store: stale row handle into store 'cells' - the row it addressed was removed (stale-handle trap pinned at 690_115)");
        }
        long __r = __koru_row_of(h);
        if (__r < 0) throw new global::System.Exception("std/store: 'cells[...]' does not address a row - the value is not a handle this store issued (handles come from `| row` and row cursors)");
        return __r;
    }
    public static long __koru_handle_of(long dense) {
        if (__koru_gen0) return dense | (__koru_brand << 24);
        long __slot = dense;
        if (!__koru_ident) __slot = __koru_row_hslot[dense];
        return (__slot | (__koru_brand << 24)) | (__koru_hslot_gen[__slot] << 32);
    }
}

  static class __koru_store_head {
    public static long h = -1;
    public static long __koru_brand = -1;
}
  static class __koru_store_probe {
    public static long v1 = 0;
    public static long v2 = 0;
    public static long v3 = 0;
    public static long __koru_brand = -1;
}
  public static class __store_insertf_cells_event {
    public struct Input {
      public long v;
      public long next;
      public long __site_line;
    }
    public struct Output {
      public string tag;
      public long row;
      public dynamic full;
    }
    public static Output handler(Input __koru_input) {
      var v = __koru_input.v;
      var next = __koru_input.next;
      var __site_line = __koru_input.__site_line;
      if (__koru_store_cells.len >= 8) return new Output { tag = "full", full = new { } };
      if (__koru_store_cells.len >= 8) throw new global::System.Exception("std/store: store 'cells' is full (capacity 8) - declared capacity and the `| full` branch are pinned at 690_011");
      long __koru_new_row = __koru_store_cells.len;
      long __koru_hslot;
      if (__koru_store_cells.__koru_hslot_free_len > 0) {
      __koru_store_cells.__koru_hslot_free_len -= 1;
      __koru_hslot = __koru_store_cells.__koru_hslot_free[__koru_store_cells.__koru_hslot_free_len];
      } else {
      __koru_hslot = __koru_store_cells.__koru_hslot_next;
      __koru_store_cells.__koru_hslot_next += 1;
      }
      if (!__koru_store_cells.__koru_ident) {
      __koru_store_cells.__koru_hslot_row[__koru_hslot] = __koru_new_row;
      __koru_store_cells.__koru_row_hslot[__koru_new_row] = __koru_hslot;
      }
      __koru_store_cells.v[__koru_new_row] = v;
      __koru_store_cells.next[__koru_new_row] = next;
      __koru_store_cells.len += 1;
      return new Output { tag = "row", row = __koru_store_cells.__koru_handle_of(__koru_new_row) };

      return default;

    }
  }
  public static class __store_apply_cells_event {
    public struct Input {
      public long row;
      public long field;
      public long value_0;
      public long value_1;
    }
    public struct Output {
      public string tag;
      public long v;
      public long next;
    }
    public static Output handler(Input __koru_input) {
      var row = __koru_input.row;
      var field = __koru_input.field;
      var value_0 = __koru_input.value_0;
      var value_1 = __koru_input.value_1;
      var __koru_r = row;
      switch (field) {
      case 0: { __koru_store_cells.v[__koru_r] = value_0; return new Output { tag = "v", v = value_0 }; }
      case 1: { __koru_store_cells.next[__koru_r] = value_1; return new Output { tag = "next", next = value_1 }; }
      }
      throw new global::System.Exception("__store_apply_cells: field index " + field + " is not a column of store 'cells'");

      return default;

    }
  }
  public static class __store_apply_head_event {
    public struct Input {
      public long field;
      public long value;
    }
    public struct Output {
      public string tag;
      public long h;
    }
    public static Output handler(Input __koru_input) {
      var field = __koru_input.field;
      var value = __koru_input.value;
      switch (field) {
      case 0: { __koru_store_head.h = value; return new Output { tag = "h", h = value }; }
      }
      throw new global::System.Exception("__store_apply_head: field index " + field + " is not a column of store 'head'");

      return default;

    }
  }
  public static class __store_write_head_event {
    public struct Input {
      public long field;
      public long value;
    }
    public static dynamic handler(Input __koru_input) {
      var field = __koru_input.field;
      var value = __koru_input.value;
      var result_0 = main_module.__store_apply_head_event.handler(new __store_apply_head_event.Input { field = (long)(field), value = (long)(value)});
      var _auto_8 = result_0.h;

      return default;

    }
  }
  public static class __store_announce_head_event {
    public struct Input {
      public long field;
    }
    public static dynamic handler(Input __koru_input) {
      var field = __koru_input.field;


      return default;

    }
  }
  public static class __store_apply_probe_event {
    public struct Input {
      public long field;
      public long value;
    }
    public struct Output {
      public string tag;
      public long v1;
      public long v2;
      public long v3;
    }
    public static Output handler(Input __koru_input) {
      var field = __koru_input.field;
      var value = __koru_input.value;
      switch (field) {
      case 0: { __koru_store_probe.v1 = value; return new Output { tag = "v1", v1 = value }; }
      case 1: { __koru_store_probe.v2 = value; return new Output { tag = "v2", v2 = value }; }
      case 2: { __koru_store_probe.v3 = value; return new Output { tag = "v3", v3 = value }; }
      }
      throw new global::System.Exception("__store_apply_probe: field index " + field + " is not a column of store 'probe'");

      return default;

    }
  }
  public static class __store_write_probe_event {
    public struct Input {
      public long field;
      public long value;
    }
    public static dynamic handler(Input __koru_input) {
      var field = __koru_input.field;
      var value = __koru_input.value;
      var result_1 = main_module.__store_apply_probe_event.handler(new __store_apply_probe_event.Input { field = (long)(field), value = (long)(value)});
      if (result_1.tag == "v1") {
        var _auto_9 = result_1.v1;
      }
      if (result_1.tag == "v2") {
        var _auto_10 = result_1.v2;
      }
      if (result_1.tag == "v3") {
        var _auto_11 = result_1.v3;
      }

      return default;

    }
  }
  public static class __store_announce_probe_event {
    public struct Input {
      public long field;
    }
    public static dynamic handler(Input __koru_input) {
      var field = __koru_input.field;


      return default;

    }
  }
  public static class __store_envwrite_probe_event {
    public struct Input {
      public long field;
      public long value;
    }
    public static dynamic handler(Input __koru_input) {
      var field = __koru_input.field;
      var value = __koru_input.value;
      var __koru_mask = (ulong)field;
      if ((__koru_mask & (1UL << 0)) != 0) __koru_store_probe.v1 = value;
      if ((__koru_mask & (1UL << 1)) != 0) __koru_store_probe.v2 = value;
      if ((__koru_mask & (1UL << 2)) != 0) __koru_store_probe.v3 = value;

      return default;

    }
  }
  public static class std_io_print_ln_event {
    public struct Input {
      public dynamic expr;
      public dynamic invocation;
      public dynamic item;
      public dynamic program;
      public dynamic reporter;
      public dynamic allocator;
    }
    public static dynamic handler(Input __koru_input) {
      var expr = __koru_input.expr;
      var invocation = __koru_input.invocation;
      var item = __koru_input.item;
      var program = __koru_input.program;
      var reporter = __koru_input.reporter;
      var allocator = __koru_input.allocator;
      throw new global::System.Exception("ln: [transform] tor is lowered at compile time and must never be called");

    }
  }
  public static class std_io_print_impl_event {
    public struct Input {
      public dynamic expr;
    }
    public static dynamic handler(dynamic __koru_input) {
      throw new global::System.Exception("std.io:impl has no C# implementation — its body resolves only to a non-cs target (|zig / [comptime]), directly or through a callee");
    }
  }
  public static void flow0() {
    var result_2 = main_module.__store_insertf_cells_event.handler(new __store_insertf_cells_event.Input { v = (long)(10), next = (long)(-1), __site_line = (long)(36)});
    if (result_2.tag == "row") {
      var a = result_2.row;
      main_module.__store_write_head_event.handler(new __store_write_head_event.Input { field = (long)(0), value = (long)(a)});
    }
    if (result_2.tag == "full") {
    }
  }
  public static void flow1() {
    var result_3 = main_module.__store_insertf_cells_event.handler(new __store_insertf_cells_event.Input { v = (long)(20), next = (long)(__koru_store_head.h), __site_line = (long)(40)});
    if (result_3.tag == "row") {
      var b = result_3.row;
      main_module.__store_write_head_event.handler(new __store_write_head_event.Input { field = (long)(0), value = (long)(b)});
    }
    if (result_3.tag == "full") {
    }
  }
  public static void flow2() {
    var result_4 = main_module.__store_insertf_cells_event.handler(new __store_insertf_cells_event.Input { v = (long)(30), next = (long)(__koru_store_head.h), __site_line = (long)(44)});
    if (result_4.tag == "row") {
      var c = result_4.row;
      main_module.__store_write_head_event.handler(new __store_write_head_event.Input { field = (long)(0), value = (long)(c)});
    }
    if (result_4.tag == "full") {
    }
  }
  public static void flow3() {
    {
      var __koru_p_field = (long)((long)((long)((ulong)((ulong)(1) << 0))));
      var __koru_p_value = (long)(__koru_store_cells.__koru_read_v(__koru_store_head.h));
      var __koru_mask = (ulong)__koru_p_field;
      if ((__koru_mask & (1UL << 0)) != 0) __koru_store_probe.v1 = __koru_p_value;
      if ((__koru_mask & (1UL << 1)) != 0) __koru_store_probe.v2 = __koru_p_value;
      if ((__koru_mask & (1UL << 2)) != 0) __koru_store_probe.v3 = __koru_p_value;
    }
    {
      var __koru_p_field = (long)((long)((long)((ulong)((ulong)(1) << 1))));
      var __koru_p_value = (long)(__koru_store_cells.__koru_read_v(__koru_store_cells.__koru_read_next(__koru_store_head.h)));
      var __koru_mask = (ulong)__koru_p_field;
      if ((__koru_mask & (1UL << 0)) != 0) __koru_store_probe.v1 = __koru_p_value;
      if ((__koru_mask & (1UL << 1)) != 0) __koru_store_probe.v2 = __koru_p_value;
      if ((__koru_mask & (1UL << 2)) != 0) __koru_store_probe.v3 = __koru_p_value;
    }
    {
      var __koru_p_field = (long)(0);

    }
    {
      var __koru_p_field = (long)(1);

    }
  }
  public static void flow4() {
    main_module.__store_write_probe_event.handler(new __store_write_probe_event.Input { field = (long)(2), value = (long)(__koru_store_cells.__koru_read_v(__koru_store_cells.__koru_read_next(__koru_store_cells.__koru_read_next(__koru_store_head.h))))});
  }
  public static void flow5() {
__koru_stdout_write("hop1 " + __koru_str(__koru_store_probe.v1) + " hop2 " + __koru_str(__koru_store_probe.v2) + " hop3 " + __koru_str(__koru_store_probe.v3) + "\n");
  }
}

static class Program {
  static void Main() {
    main_module.flow0();
    main_module.flow1();
    main_module.flow2();
    main_module.flow3();
    main_module.flow4();
    main_module.flow5();
  }
}

output_emitted.cs

Actual

hop1 30 hop2 20 hop3 10

Expected output

✓ Zig✓ C#

hop1 30 hop2 20 hop3 10

Flows

flow ~new click a branch to expand · @labels scroll to their anchor

new (cells, capacity: 8, source: v: i64, next: -1[i64])

flow ~new click a branch to expand · @labels scroll to their anchor

new (head, source: h: -1[i64])

flow ~new click a branch to expand · @labels scroll to their anchor

new (probe, source: v1: 0[i64], v2: 0[i64], v3: 0[i64])

flow ~insert click a branch to expand · @labels scroll to their anchor

insert (cells, source: v: 10, next: -1)

flow ~insert click a branch to expand · @labels scroll to their anchor

insert (cells, source: v: 20, next: head.h)

flow ~insert click a branch to expand · @labels scroll to their anchor

insert (cells, source: v: 30, next: head.h)

flow ~stored click a branch to expand · @labels scroll to their anchor

stored (source: probe.v1: cells[head.h].v, probe.v2: cells[cells[head.h].next].v)

flow ~stored click a branch to expand · @labels scroll to their anchor

stored (source: probe.v3: cells[cells[cells[head.h].next].next].v)

flow ~print.ln click a branch to expand · @labels scroll to their anchor

print.ln (expr: "hop1 {{ probe.v1:d }} hop2 {{ probe.v2:d }} hop3 {{ probe.v3:d }}")

Test Configuration

MUST_RUN LANGUAGES: zig cs

← 244 unary minus before a row reference 246 sweep names its own row handle →