✓
Passing This code compiles and runs correctly.
Code
// Pins TWO things about a variant-selected tor that also carries an EFFECT arm.
//
// 1. `$mod.` is rewritten in EVERY variant body, not only the selected one.
// Both bodies are emitted regardless of which is chosen, so an unselected
// variant using `$mod.` shipped it verbatim into the Zig and failed the
// build on a platform whose variant was never selected. FIXED.
//
// 2. RED, and the reason this test does not pass: an effect-bearing tor with
// proc variants emits each variant as a STANDALONE `handler__<variant>`
// function, whose body still calls the effect arm — `tick(...)` — which
// does not exist in that scope. The effect arm is only in scope on the
// inline-splice path the bare handler takes. So today an effect arm and a
// proc variant cannot be combined at all, which is exactly what a
// platform-selected event loop needs.
//
// A proc body that carries effect branches splices into its caller, so module
// scope is gone and KORU112 requires `$mod.<name>`. Both variant bodies are
// emitted into the binary regardless of which is selected — so an unselected
// variant using `$mod.` shipped it verbatim into the Zig, failing the build on
// a platform whose variant was never chosen.
//
// `alt` is never selected here. It must still compile.
~import std/io
const std = @import("std");
const factor: i32 = 10;
~tor pump { n: i32 }
! tick i32
| done string
~proc pump|zig {
tick(n * $mod.factor);
return .{ .done = "zig" };
}
~proc pump|alt {
tick(n * $mod.factor * 2);
return .{ .done = "alt" };
}
~tor drive { n: i32 }
| finished string
| blank
~drive =
pump(n)
! tick _ |> _
| done d -> finished d
~drive(n: 3)
| finished f |> std/io:print.ln(f)
| blank |> std/io:print.ln("blank")
Supporting Files
using static KoruHost;
static class KoruHost {
public const long factor = 10;
}
~proc pump|cs {
tick((int)(n * factor));
return new Output { tag = "done", done = "zig" };
}Actual
zig
Expected output
✓ Zig✓ C#zig
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 {
const std = @import("std");
const factor: i32 = 10;
pub const pump_event = struct {
pub const Input = struct {
n: i32,
};
pub const Output = union(enum(u8)) {
done: []const u8,
};
pub fn handler(__koru_event_input: @This().Input, comptime __H: type) @This().Output {
const tick = __H.tick;
_ = &tick;
// >>> PROC: pump [tests/regression/300_ADVANCED_FEATURES/370_VARIANTS/370_010_unselected_variant_rewrites_mod/input.kz:34]
const n = __koru_event_input.n;
_ = &n;
_ = &__koru_event_input;
tick(n * factor);
return .{ .done = "zig" };
}
pub fn handler__alt(__koru_event_input: @This().Input, comptime __H: type) @This().Output { // |alt
const n = __koru_event_input.n;
const tick = __H.tick;
_ = &tick;
_ = &n;
_ = &__koru_event_input;
tick(n * factor * 2);
return .{ .done = "alt" };
}
};
pub const drive_event = struct {
pub const Input = struct {
n: i32,
};
pub const Output = union(enum(u8)) {
finished: []const u8,
blank: struct {
},
};
pub inline fn handler(__koru_event_input: @This().Input) @This().Output {
return __koru_handler_impl(__koru_event_input.n);
}
fn __koru_handler_impl(__koru_p_0: i32) @This().Output {
const __koru_event_input: @This().Input = .{ .n = __koru_p_0 };
// >>> SUBFLOW: tests/regression/300_ADVANCED_FEATURES/370_VARIANTS/370_010_unselected_variant_rewrites_mod/input.kz:49
const n = __koru_event_input.n;
_ = &n;
_ = &__koru_event_input;
const Handlers_sf = struct {
fn tick(_auto_6: i32) void {
_ = &_auto_6;
{
}
}
};
const result = main_module.pump_event.handler(.{ .n = n }, Handlers_sf);
switch (result) {
// >>> BRANCH: tests/regression/300_ADVANCED_FEATURES/370_VARIANTS/370_010_unselected_variant_rewrites_mod/input.kz:51 | done d |>
.done => |d| {
_ = &d;
return .{ .finished = d };
},
}
}
};
// >>> FLOW: tests/regression/300_ADVANCED_FEATURES/370_VARIANTS/370_010_unselected_variant_rewrites_mod/input.kz:53 ~input:drive()
pub fn flow0() void {
const result_0 = main_module.drive_event.handler(.{ .n = 3 });
switch (result_0) {
// >>> BRANCH: tests/regression/300_ADVANCED_FEATURES/370_VARIANTS/370_010_unselected_variant_rewrites_mod/input.kz:54 | finished f |>
.finished => |f| {
(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("{s}\n", .{f});
},
// >>> BRANCH: tests/regression/300_ADVANCED_FEATURES/370_VARIANTS/370_010_unselected_variant_rewrites_mod/input.kz:55 | blank |>
.blank => {
(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("blank\n", .{});
},
}
}
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;
}
};
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.koru_end_flow();
if (comptime @import("builtin").mode == .Debug) koru_leak_check();
}
test {
@import("std").testing.refAllDeclsRecursive(@This());
}
Emitted C# source
using static KoruHost;
static class KoruHost {
public const long factor = 10;
}
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();
public static class pump_event {
public struct Input {
public int n;
}
public struct Output {
public string tag;
public string done;
}
public interface IOps {
void tick(int __koru_arg);
}
public static Output handler<H>(Input __koru_input, H ops) where H : struct, IOps {
void tick(int __koru_arg) => ops.tick(__koru_arg);
var n = __koru_input.n;
tick((int)(n * factor));
return new Output { tag = "done", done = "zig" };
return default;
}
}
public static class drive_event {
public struct Input {
public int n;
}
public struct Output {
public string tag;
public string finished;
public dynamic blank;
}
public static Output handler(Input __koru_input) {
var n = __koru_input.n;
var __koru_handlers_0 = new __koru_handlers_0 { };
var result_2 = main_module.pump_event.handler(new pump_event.Input { n = (int)(n)}, __koru_handlers_0);
var d = result_2.done;
return new Output { tag = "finished", finished = d };
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_3 = main_module.drive_event.handler(new drive_event.Input { n = (int)(3)});
if (result_3.tag == "finished") {
var f = result_3.finished;
__koru_stdout_write("" + (f) + "\n");
}
if (result_3.tag == "blank") {
__koru_stdout_write("blank" + "\n");
}
}
public static void flow1() {
main_module.koru_start_event.handler(new koru_start_event.Input { });
}
public static void flow2() {
main_module.koru_end_event.handler(new koru_end_event.Input { });
}
struct __koru_handlers_0 : pump_event.IOps {
public void tick(int __koru_arm_1) {
var _auto_6 = __koru_arm_1;
}
}
}
static class Program {
static void Main() {
main_module.flow1();
main_module.flow0();
main_module.flow2();
}
}
Flows
subflow ~drive click a branch to expand · @labels scroll to their anchor
pump (n)
flow ~drive click a branch to expand · @labels scroll to their anchor
drive (n: 3)
Test Configuration
MUST_RUN LANGUAGES: zig cs