✓
Passing This code compiles and runs correctly.
Code
// 690_052 — FIXED-CHAR column: `char[N]` — a fixed-length byte column in a
// container. Tier A of the string story (690_020 lineage): STATIC SoA
// (`[CAP][N]u8`), zero allocation, NO ownership (no take/discharge). Rides the
// typed-SoA-column work (690_049) — char[N] is just another column array type.
// This is the store shape a to-do TUI needs: a flag + a label. Write path:
// a string literal copies into the fixed buffer (zero-padded; comptime-known
// overflow is a compile error at the insert site, runtime bytes truncate).
// Read path: `query { entity.label }` binds the bytes up to the first NUL.
import std/io
import std/store
std/store:new(todos, capacity: 8) { done: i64, label: char[16] }
std/store:insert(todos) { done: 0, label: "buy milk" }
| row _ |> std/store:insert(todos) { done: 1, label: "ship koru" }
| row _ |> _
std/store:rule(todos)
! row e |> std/io:print.ln("[{{ e.done:d }}] {{ e.label:s }}")
Actual
[0] buy milk
[1] ship koru
Expected output
✓ Zig✓ C#[0] buy milk
[1] ship koru
Emitted Zig source
// Access compiler flags via the per-user compiler_env module
const CompilerEnv = @import("compiler_env").CompilerEnv;
pub const panic = if (@import("builtin").mode == .Debug)
@import("std").debug.FullPanic(@import("std").debug.defaultPanic)
else
@import("std").debug.simple_panic;
const __koru_bare = struct {
extern fn posix_memalign(memptr: *?*anyopaque, alignment: usize, size: usize) c_int;
extern fn free(ptr: ?*anyopaque) void;
fn bareAlloc(_: *anyopaque, len: usize, alignment: @import("std").mem.Alignment, _: usize) ?[*]u8 {
var p: ?*anyopaque = null;
const a = @max(alignment.toByteUnits(), @sizeOf(usize));
if (posix_memalign(&p, a, len) != 0) return null;
return @ptrCast(p);
}
fn bareResize(_: *anyopaque, _: []u8, _: @import("std").mem.Alignment, _: usize, _: usize) bool { return false; }
fn bareRemap(_: *anyopaque, _: []u8, _: @import("std").mem.Alignment, _: usize, _: usize) ?[*]u8 { return null; }
fn bareFree(_: *anyopaque, memory: []u8, _: @import("std").mem.Alignment, _: usize) void { free(@ptrCast(memory.ptr)); }
const vtable = @import("std").mem.Allocator.VTable{ .alloc = bareAlloc, .resize = bareResize, .remap = bareRemap, .free = bareFree };
const allocator = @import("std").mem.Allocator{ .ptr = undefined, .vtable = &vtable };
};
const __koru_backing = if (@import("builtin").link_libc) @import("std").heap.c_allocator else if (@import("builtin").os.tag == .freestanding) __koru_bare.allocator else @import("std").heap.page_allocator;
var __koru_leak_count: @import("std").atomic.Value(usize) = .init(0);
fn __koru_alloc(ctx: *anyopaque, len: usize, alignment: @import("std").mem.Alignment, ret_addr: usize) ?[*]u8 {
_ = ctx;
const r = __koru_backing.rawAlloc(len, alignment, ret_addr);
if (comptime @import("builtin").mode == .Debug) {
if (r != null) _ = __koru_leak_count.fetchAdd(1, .monotonic);
}
return r;
}
fn __koru_resize(ctx: *anyopaque, memory: []u8, alignment: @import("std").mem.Alignment, new_len: usize, ret_addr: usize) bool {
_ = ctx;
return __koru_backing.rawResize(memory, alignment, new_len, ret_addr);
}
fn __koru_remap(ctx: *anyopaque, memory: []u8, alignment: @import("std").mem.Alignment, new_len: usize, ret_addr: usize) ?[*]u8 {
_ = ctx;
return __koru_backing.rawRemap(memory, alignment, new_len, ret_addr);
}
fn __koru_free(ctx: *anyopaque, memory: []u8, alignment: @import("std").mem.Alignment, ret_addr: usize) void {
_ = ctx;
__koru_backing.rawFree(memory, alignment, ret_addr);
if (comptime @import("builtin").mode == .Debug) {
_ = __koru_leak_count.fetchSub(1, .monotonic);
}
}
const __koru_vtable = @import("std").mem.Allocator.VTable{ .alloc = __koru_alloc, .resize = __koru_resize, .remap = __koru_remap, .free = __koru_free };
pub fn koru_allocator() @import("std").mem.Allocator {
return .{ .ptr = undefined, .vtable = &__koru_vtable };
}
pub inline fn __koru_intcast(comptime T: type, x: anytype) T {
if (comptime (@import("builtin").mode == .Debug or @import("builtin").mode == .ReleaseSafe))
return @as(T, @intCast(x));
const dst = @typeInfo(T);
const src = @typeInfo(@TypeOf(x));
if (comptime (dst == .int and src == .int and dst.int.bits == src.int.bits and dst.int.signedness != src.int.signedness))
return @as(T, @bitCast(x));
return @as(T, @intCast(x));
}
pub fn koru_leak_check() void {
if (comptime @import("builtin").mode != .Debug) return;
if (__koru_leak_count.load(.acquire) == 0) return;
if (comptime @import("builtin").target.os.tag == .freestanding) {
if (comptime @import("builtin").cpu.arch == .wasm32 or @import("builtin").cpu.arch == .wasm64) {
@panic("KORU LEAK CHECK FAILED: the produced program leaked");
} else {
const __klc = struct { extern var stdout: ?*anyopaque; extern fn fputs(__s: [*:0]const u8, __st: ?*anyopaque) c_int; };
var __lb: [128]u8 = undefined;
const __lm = "KORU LEAK CHECK FAILED: allocations still outstanding at end of run: ";
@memcpy(__lb[0..__lm.len], __lm);
var __ln: usize = __lm.len;
var __lv = __koru_leak_count.load(.acquire);
var __ld: [20]u8 = undefined;
var __lk: usize = 0;
while (__lv > 0) : (__lk += 1) { __ld[__lk] = @intCast('0' + __lv % 10); __lv /= 10; }
for (0..__lk) |__li| { __lb[__ln] = __ld[__lk - 1 - __li]; __ln += 1; }
__lb[__ln] = '\n'; __ln += 1; __lb[__ln] = 0;
_ = __klc.fputs(@as([*:0]const u8, @ptrCast(&__lb)), __klc.stdout);
@trap();
}
} else {
@import("std").debug.print("KORU LEAK CHECK FAILED: the produced program leaked (trace above)\n", .{});
@import("std").process.exit(1);
}
}
pub const main_module = struct {
// std/store: plural store 'todos' created (SoA cell + insert/query/write/take/stripe units); fields done: i64, label: char[16]
// >>> FLOW: tests/regression/600_STDLIB/690_STORE/690_052_store_fixed_char_column/input.k:15 ~input:__store_inserth_todos()
pub fn flow0() void {
const result_0 = main_module.__store_inserth_todos_event.handler(.{ .done = 0, .label = "buy milk", .__site_line = 15 });
const _auto_6 = result_0.row;
_ = &_auto_6;
const result_1 = main_module.__store_inserth_todos_event.handler(.{ .done = 1, .label = "ship koru", .__site_line = 16 });
_ = &result_1;
const _auto_7 = result_1.row;
_ = &_auto_7;
}
// >>> FLOW: tests/regression/600_STDLIB/690_STORE/690_052_store_fixed_char_column/input.k:19 ~input:__store_qsweep_todos_L19_690_052_store_fixed_char_column_input_d75087()
pub fn flow1() void {
_ = main_module.__store_qsweep_todos_L19_690_052_store_fixed_char_column_input_d75087_event.handler(.{ });
}
pub fn koru_start_flow() void {
const result_0 = koru_koru.start_event.handler(.{ });
const result_0_done = result_0.done;
_ = &result_0_done;
}
pub fn koru_end_flow() void {
const result_0 = koru_koru.end_event.handler(.{ });
const result_0_done = result_0.done;
_ = &result_0_done;
}
const __KoruStoreT_todos = struct {
done: [8]i64 = undefined,
label: [8][16]u8 = undefined,
len: usize = 0,
};
var __koru_store_todos: __KoruStoreT_todos = .{};
const __KoruStoreRow_todos = struct { done: i64, label: [16]u8 };
pub const __store_inserth_todos_event = struct {
pub const Input = struct {
done: i64,
label: []const u8,
__site_line: i64,
};
pub const Output = union(enum(u8)) {
row: i64,
};
pub fn handler(__koru_event_input: @This().Input) @This().Output {
// >>> PROC: __store_inserth_todos [tests/regression/600_STDLIB/690_STORE/690_052_store_fixed_char_column/input.k:13]
const done = __koru_event_input.done;
const label = __koru_event_input.label;
const __site_line = __koru_event_input.__site_line;
_ = &done;
_ = &label;
_ = &__site_line;
_ = &__koru_event_input;
if (__koru_store_todos.len >= 8) @panic("std/store: store 'todos' is full (capacity 8) - declared capacity and the `| full` branch are pinned at 690_011");
const __koru_new_row = __koru_store_todos.len;
__koru_store_todos.done[__koru_new_row] = done;
__koru_store_todos.label[__koru_new_row] = @import("std").mem.zeroes([16]u8);
const __koru_cl_label = @min(label.len, 16);
@memcpy(__koru_store_todos.label[__koru_new_row][0..__koru_cl_label], label[0..__koru_cl_label]);
__koru_store_todos.len += 1;
if (__site_line > 19) {
main_module.__store_qrow_todos_L19_690_052_store_fixed_char_column_input_d75087_event.handler(.{ .row = __koru_new_row });
}
return .{ .row = @as(i64, @intCast(__koru_new_row)) };
}
};
pub const __store_apply_todos_event = struct {
pub const Input = struct {
row: usize,
field: i64,
value_0: i64,
value_1: []const u8,
};
pub const Output = union(enum(u8)) {
done: i64,
label: []const u8,
};
pub fn handler(__koru_event_input: @This().Input) @This().Output {
// >>> PROC: __store_apply_todos [tests/regression/600_STDLIB/690_STORE/690_052_store_fixed_char_column/input.k:13]
const row = __koru_event_input.row;
const field = __koru_event_input.field;
const value_0 = __koru_event_input.value_0;
const value_1 = __koru_event_input.value_1;
_ = &row;
_ = &field;
_ = &value_0;
_ = &value_1;
_ = &__koru_event_input;
const __koru_r: usize = row;
return switch (field) {
0 => blk: { __koru_store_todos.done[__koru_r] = value_0; break :blk .{ .done = value_0 }; },
1 => blk: { __koru_store_todos.label[__koru_r] = @import("std").mem.zeroes([16]u8); const __koru_wl = @min(value_1.len, 16); @memcpy(__koru_store_todos.label[__koru_r][0..__koru_wl], value_1[0..__koru_wl]); break :blk .{ .label = value_1 }; },
else => unreachable,
};
}
};
pub const __store_qrow_todos_L19_690_052_store_fixed_char_column_input_d75087_event = struct {
pub const Input = struct {
row: usize,
};
pub const Output = void;
pub inline fn handler(__koru_event_input: @This().Input) @This().Output {
return __koru_handler_impl(__koru_event_input.row);
}
fn __koru_handler_impl(__koru_p_0: usize) @This().Output {
const __koru_event_input: @This().Input = .{ .row = __koru_p_0 };
// >>> PROC: __store_qrow_todos_L19_690_052_store_fixed_char_column_input_d75087 [tests/regression/600_STDLIB/690_STORE/690_052_store_fixed_char_column/input.k:13]
const row = __koru_event_input.row;
_ = &row;
_ = &__koru_event_input;
const __koru_r: usize = row;
main_module.__store_qbody_todos_L19_690_052_store_fixed_char_column_input_d75087_event.handler(.{ .__koru_sdix_rule_L19 = __koru_r });
return;
}
};
pub const __store_qbody_todos_L19_690_052_store_fixed_char_column_input_d75087_event = struct {
pub const Input = struct {
__koru_sdix_rule_L19: usize,
};
pub const Output = void;
pub inline fn handler(__koru_event_input: @This().Input) @This().Output {
return __koru_handler_impl(__koru_event_input.__koru_sdix_rule_L19);
}
fn __koru_handler_impl(__koru_p_0: usize) @This().Output {
const __koru_event_input: @This().Input = .{ .__koru_sdix_rule_L19 = __koru_p_0 };
// >>> SUBFLOW: tests/regression/600_STDLIB/690_STORE/690_052_store_fixed_char_column/input.k:13
const __koru_sdix_rule_L19 = __koru_event_input.__koru_sdix_rule_L19;
_ = &__koru_sdix_rule_L19;
_ = &__koru_event_input;
(struct { fn __kout(__fd: i32, __b: []const u8) void { if (@import("builtin").os.tag == .freestanding) { const __kc = struct { extern var stdout: ?*anyopaque; extern var stderr: ?*anyopaque; extern fn fputs(__s: [*:0]const u8, __st: ?*anyopaque) c_int; }; var __kt: [4096]u8 = undefined; for (0..(__b.len + __kt.len - 2) / (__kt.len - 1)) |__ki| { const __kn = @min(__kt.len - 1, __b.len - __ki * (__kt.len - 1)); @memcpy(__kt[0..__kn], __b[__ki * (__kt.len - 1)..][0..__kn]); __kt[__kn] = 0; @import("std").mem.doNotOptimizeAway(__kc.fputs(@as([*:0]const u8, @ptrCast(&__kt)), if (__fd == 2) __kc.stderr else __kc.stdout)); } } else { @import("std").mem.doNotOptimizeAway(@import("std").posix.write(__fd, __b) catch @as(usize, 0)); } } fn __kw(comptime __f: []const u8, __a: anytype) void { var __kb: [65536]u8 = undefined; const __ks = @import("std").fmt.bufPrint(&__kb, __f, __a) catch __kb[0..0]; __kout(1, __ks); } }).__kw("[{d}] {s}\n", .{(&__koru_store_todos.done)[@as(usize, @intCast(__koru_sdix_rule_L19))], @import("std").mem.sliceTo(&(&__koru_store_todos.label)[@as(usize, @intCast(__koru_sdix_rule_L19))], 0)});
}
};
pub const __store_qsweep_todos_L19_690_052_store_fixed_char_column_input_d75087_event = struct {
pub const Input = struct {
};
pub const Output = void;
pub fn handler(__koru_event_input: @This().Input) @This().Output {
// >>> PROC: __store_qsweep_todos_L19_690_052_store_fixed_char_column_input_d75087 [tests/regression/600_STDLIB/690_STORE/690_052_store_fixed_char_column/input.k:13]
_ = &__koru_event_input;
for (0..__koru_store_todos.len) |__koru_i| {
main_module.__store_qrow_todos_L19_690_052_store_fixed_char_column_input_d75087_event.handler(.{ .row = __koru_i });
}
return;
}
};
};
pub const koru_koru = struct {
pub const start_event = struct {
pub const Input = struct {
};
pub const Output = union(enum(u8)) {
done: struct {
},
};
pub fn handler(__koru_event_input: @This().Input) @This().Output {
_ = &__koru_event_input;
return .{ .done = .{} };
}
};
pub const end_event = struct {
pub const Input = struct {
};
pub const Output = union(enum(u8)) {
done: struct {
},
};
pub fn handler(__koru_event_input: @This().Input) @This().Output {
_ = &__koru_event_input;
return .{ .done = .{} };
}
};
};
pub fn main() void {
main_module.koru_start_flow();
main_module.flow0();
main_module.flow1();
main_module.koru_end_flow();
if (comptime @import("builtin").mode == .Debug) koru_leak_check();
}
test {
@import("std").testing.refAllDeclsRecursive(@This());
}
Emitted C# source
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 'todos' created (SoA cell + insert/query/write/take/stripe units); fields done: i64, label: char[16]
static class __koru_store_todos {
public static long[] done = new long[8];
public static string[] label = new string[8];
public static long len = 0;
public static long __koru_brand = -1;
}
public static class __store_inserth_todos_event {
public struct Input {
public long done;
public string label;
public long __site_line;
}
public struct Output {
public string tag;
public long row;
}
public static Output handler(Input __koru_input) {
var done = __koru_input.done;
var label = __koru_input.label;
var __site_line = __koru_input.__site_line;
if (__koru_store_todos.len >= 8) throw new global::System.Exception("std/store: store 'todos' is full (capacity 8) - declared capacity and the `| full` branch are pinned at 690_011");
long __koru_new_row = __koru_store_todos.len;
__koru_store_todos.done[__koru_new_row] = done;
__koru_store_todos.label[__koru_new_row] = (label.Length > 16) ? label.Substring(0, 16) : label;
__koru_store_todos.len += 1;
if (__site_line > 19) {
main_module.__store_qrow_todos_L19_690_052_store_fixed_char_column_input_d75087_event.handler(new main_module.__store_qrow_todos_L19_690_052_store_fixed_char_column_input_d75087_event.Input { row = __koru_new_row });
}
return new Output { tag = "row", row = __koru_new_row };
return default;
}
}
public static class __store_apply_todos_event {
public struct Input {
public long row;
public long field;
public long value_0;
public string value_1;
}
public struct Output {
public string tag;
public long done;
public string label;
}
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_todos.done[__koru_r] = value_0; return new Output { tag = "done", done = value_0 }; }
case 1: { __koru_store_todos.label[__koru_r] = (value_1.Length > 16) ? value_1.Substring(0, 16) : value_1; return new Output { tag = "label", label = value_1 }; }
}
throw new global::System.Exception("__store_apply_todos: field index " + field + " is not a column of store 'todos'");
return default;
}
}
public static class __store_qrow_todos_L19_690_052_store_fixed_char_column_input_d75087_event {
public struct Input {
public long row;
}
public static dynamic handler(Input __koru_input) {
var row = __koru_input.row;
var __koru_r = row;
main_module.__store_qbody_todos_L19_690_052_store_fixed_char_column_input_d75087_event.handler(new main_module.__store_qbody_todos_L19_690_052_store_fixed_char_column_input_d75087_event.Input { __koru_sdix_rule_L19 = __koru_r });
return default;
}
}
public static class __store_qbody_todos_L19_690_052_store_fixed_char_column_input_d75087_event {
public struct Input {
public long __koru_sdix_rule_L19;
}
public static dynamic handler(Input __koru_input) {
var __koru_sdix_rule_L19 = __koru_input.__koru_sdix_rule_L19;
__koru_stdout_write("[" + __koru_str(__koru_store_todos.done[(__koru_sdix_rule_L19)]) + "] " + __koru_str(__koru_store_todos.label[(__koru_sdix_rule_L19)]) + "\n");
return default;
}
}
public static class __store_qsweep_todos_L19_690_052_store_fixed_char_column_input_d75087_event {
public struct Input {
}
public static dynamic handler(Input __koru_input) {
for (long __koru_i = 0; __koru_i < __koru_store_todos.len; __koru_i++) {
main_module.__store_qrow_todos_L19_690_052_store_fixed_char_column_input_d75087_event.handler(new main_module.__store_qrow_todos_L19_690_052_store_fixed_char_column_input_d75087_event.Input { row = __koru_i });
}
return default;
}
}
public static class koru_start_event {
public struct Input {
}
public struct Output {
public string tag;
public dynamic done;
}
public static Output handler(Input __koru_input) => new Output { tag = "done" };
}
public static class koru_end_event {
public struct Input {
}
public struct Output {
public string tag;
public dynamic done;
}
public static Output handler(Input __koru_input) => new Output { tag = "done" };
}
public static void flow0() {
var result_0 = main_module.__store_inserth_todos_event.handler(new __store_inserth_todos_event.Input { done = (long)(0), label = (string)("buy milk"), __site_line = (long)(15)});
var _auto_6 = result_0.row;
var result_1 = main_module.__store_inserth_todos_event.handler(new __store_inserth_todos_event.Input { done = (long)(1), label = (string)("ship koru"), __site_line = (long)(16)});
var _auto_7 = result_1.row;
}
public static void flow1() {
{
for (long __koru_i = 0; __koru_i < __koru_store_todos.len; __koru_i++) {
main_module.__store_qrow_todos_L19_690_052_store_fixed_char_column_input_d75087_event.handler(new main_module.__store_qrow_todos_L19_690_052_store_fixed_char_column_input_d75087_event.Input { row = __koru_i });
}
}
}
public static void flow2() {
main_module.koru_start_event.handler(new koru_start_event.Input { });
}
public static void flow3() {
main_module.koru_end_event.handler(new koru_end_event.Input { });
}
}
static class Program {
static void Main() {
main_module.flow2();
main_module.flow0();
main_module.flow1();
main_module.flow3();
}
}
Flows
flow ~new click a branch to expand · @labels scroll to their anchor
new (todos, capacity: 8, source: done: i64, label: char[16])
flow ~insert click a branch to expand · @labels scroll to their anchor
insert (todos, source: done: 0, label: "buy milk")
flow ~rule click a branch to expand · @labels scroll to their anchor
rule (todos)
Test Configuration
MUST_RUN LANGUAGES: zig cs