040 effect discard carveouts legal

// 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 and !@import("builtin").cpu.arch.isWasm()) __koru_bare.allocator else @import("std").heap.page_allocator;
var __koru_leak_count: @import("std").atomic.Value(usize) = .init(0);
var __koru_par_tasks: @import("std").atomic.Value(usize) = .init(0);
const __koru_par_CAP: usize = 128;
threadlocal var __koru_par_depth: usize = 0;
const __koru_par_DEPTH_CAP: usize = 7;
var __koru_par_pool: @import("std").Thread.Pool = undefined;
var __koru_par_pool_ready: bool = false;
var __koru_par_pool_mtx: @import("std").Thread.Mutex = .{};
fn __koru_par_pool_ensure() *@import("std").Thread.Pool {
    __koru_par_pool_mtx.lock();
    defer __koru_par_pool_mtx.unlock();
    if (!__koru_par_pool_ready) {
        @import("std").Thread.Pool.init(&__koru_par_pool, .{ .allocator = @import("std").heap.smp_allocator }) catch @panic("koru: thread pool init failed");
        __koru_par_pool_ready = true;
    }
    return &__koru_par_pool;
}
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));
}

fn __KoruPadI(comptime T: type) type {
    const V = switch (@typeInfo(T)) { .comptime_int => i64, .comptime_float => f64, else => T };
    return struct {
        v: V,
        width: usize,
        pub fn format(self: @This(), w: *@import("std").Io.Writer) @import("std").Io.Writer.Error!void {
            const rendered = @import("std").fmt.count("{d}", .{self.v});
            const pad = self.width -| rendered;
            for (0..pad) |_| try w.writeByte(' ');
            try w.print("{d}", .{self.v});
        }
    };
}
pub fn __koru_pad_i(width: usize, value: anytype) __KoruPadI(@TypeOf(value)) {
    return .{ .v = value, .width = width };
}

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 {
    pub const poll_event = struct {
        pub const Input = struct {
            x: i64,
        };
        pub const Output = union(enum(u8)) {
            done: struct {
            },
            err: i64,
        };
        pub fn handler(__koru_event_input: @This().Input, comptime __H: type) @This().Output {
            const row = __H.row;
            _ = &row;
            // >>> PROC: poll  [tests/regression/200_COMPILER_FEATURES/220_FLOW_CHECKER/220_040_effect_discard_carveouts_legal/input.kz:20]
            const x = __koru_event_input.x;
            _ = &x;
            _ = &__koru_event_input;
            return .{ .done = .{} };

        }
    };
    pub const risky_event = struct {
        pub const Input = struct {
            x: i64,
        };
        pub const Output = union(enum(u8)) {
            ok: i64,
            err: i64,
        };
        pub inline fn handler(__koru_event_input: @This().Input) @This().Output {
            return __koru_handler_impl(__koru_event_input.x);
        }
        fn __koru_handler_impl(__koru_p_0: i64) @This().Output {
            const __koru_event_input: @This().Input = .{ .x = __koru_p_0 };
            // >>> PROC: risky  [tests/regression/200_COMPILER_FEATURES/220_FLOW_CHECKER/220_040_effect_discard_carveouts_legal/input.kz:26]
            const x = __koru_event_input.x;
            _ = &x;
            _ = &__koru_event_input;
            return .{ .ok = x };

        }
    };
    // >>> FLOW: tests/regression/200_COMPILER_FEATURES/220_FLOW_CHECKER/220_040_effect_discard_carveouts_legal/input.kz:28  ~input:poll()
    pub fn flow0() void {
        const result_0: main_module.poll_event.Output = __koru_proc_0: {
            const x = (1); _ = &x;
            break :__koru_proc_0 .{ .done = .{} };
        };
        switch (result_0) {
            // >>> BRANCH: tests/regression/200_COMPILER_FEATURES/220_FLOW_CHECKER/220_040_effect_discard_carveouts_legal/input.kz:30  | done |>
            .done => {
            },
            // >>> BRANCH: tests/regression/200_COMPILER_FEATURES/220_FLOW_CHECKER/220_040_effect_discard_carveouts_legal/input.kz:31  | err _auto_7 |>
            .err => |_| {
            },
        }
    }
    // >>> FLOW: tests/regression/200_COMPILER_FEATURES/220_FLOW_CHECKER/220_040_effect_discard_carveouts_legal/input.kz:33  ~input:risky()
    pub fn flow1() void {
        const result_0 = main_module.risky_event.handler(.{ .x = 2 });
        switch (result_0) {
            .ok => |v| {
                if (v > 10) {
                    (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("big\n", .{});
                }
                else {
                }
            },
            // >>> BRANCH: tests/regression/200_COMPILER_FEATURES/220_FLOW_CHECKER/220_040_effect_discard_carveouts_legal/input.kz:36  | err _auto_9 |>
            .err => |_| {
            },
        }
    }
    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.flow1();
    main_module.koru_end_flow();
    if (comptime @import("builtin").mode == .Debug) koru_leak_check();
}

test {
    @import("std").testing.refAllDeclsRecursive(@This());
}

static class main_module {
  public static void __koru_stdout_write(object s) => global::System.Console.Out.Write(s);
  public static void __koru_stderr_write(object 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. `object`, not
  // `dynamic`: the field is storage — every `x.data` read reaches
  // it through a dynamic-typed handle (`*T` Input fields, the
  // `dynamic` borrow locals below), so the member itself only
  // needs to hold the value, and `object` keeps the DLR out of
  // the store/load path.
  public class __KoruBox { public object 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 poll_event {
    public struct Input {
      public long x;
    }
    public struct Output {
      public string tag;
      public object done;
      public long err;
    }
    public interface IOps {
      void row(long __koru_arg);
    }
    public static Output handler<H>(Input __koru_input, H ops) where H : struct, IOps {
      void row(long __koru_arg) => ops.row(__koru_arg);
      var x = __koru_input.x;
      return new Output { tag = "done", done = new { } };

      return default;

    }
  }
  public static class risky_event {
    public struct Input {
      public long x;
    }
    public struct Output {
      public string tag;
      public long ok;
      public long err;
    }
    public static Output handler(Input __koru_input) {
      var x = __koru_input.x;
      return new Output { tag = "ok", ok = x };

      return default;

    }
  }
  public static class koru_start_event {
    public struct Input {
    }
    public struct Output {
      public string tag;
      public object 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 object done;
    }
    public static Output handler(Input __koru_input) => new Output { tag = "done" };
  }
  public static void flow0() {
    var __koru_handlers_0 = new __koru_handlers_0 {  };
    var result_2 = main_module.poll_event.handler(new poll_event.Input { x = (long)(1)}, __koru_handlers_0);
    if (result_2.tag == "done") {
    }
    if (result_2.tag == "err") {
      var _auto_7 = result_2.err;
    }
  }
  public static void flow1() {
    var result_3 = main_module.risky_event.handler(new risky_event.Input { x = (long)(2)});
    var __matched_4 = false;
    if (!__matched_4 && result_3.tag == "ok") {
      var v = result_3.ok;
      if (v > 10) {
        __matched_4 = true;
__koru_stdout_write("big" + "\n");
      }
    }
    if (!__matched_4 && result_3.tag == "ok") {
      var _auto_8 = result_3.ok;
      __matched_4 = true;
    }
    if (!__matched_4 && result_3.tag == "err") {
      var _auto_9 = result_3.err;
      __matched_4 = true;
    }
  }
  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 { });
  }
  struct __koru_handlers_0 : poll_event.IOps {
    public void row(long __koru_arm_1) {
        var _auto_6 = __koru_arm_1;
      }
  }
}

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