003 fmt ln mid chain result collision

// 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);
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 {
    // >>> FLOW: tests/regression/600_STDLIB/620_FMT/620_003_fmt_ln_mid_chain_result_collision/input.k:20  ~app.net:connect()
    pub fn flow0() void {
        const result_0 = koru_app.koru_net.connect_event.handler(.{ .host = "localhost" });
        switch (result_0) {
            // >>> BRANCH: tests/regression/600_STDLIB/620_FMT/620_003_fmt_ln_mid_chain_result_collision/input.k:21  | ok c |>
            .ok => |c| {
                const req = __koru_inline_0__: {
    const __S = struct { threadlocal var __buf: [4096]u8 = undefined; };
    const __text = @import("std").fmt.bufPrint(&__S.__buf, "GET /conn/{d}", .{c}) catch @panic("std/fmt:ln output exceeds the 4096-byte scratch buffer — use fmt.blk (allocates, no cap) or [size(Nk)] for long lines");
    break :__koru_inline_0__ .{ .text = __text };
};
                const result_1 = koru_app.koru_net.write_event.handler(.{ .conn = c, .data = req.text });
                _ = &result_1;
                switch (result_1) {
                    // >>> BRANCH: tests/regression/600_STDLIB/620_FMT/620_003_fmt_ln_mid_chain_result_collision/input.k:23  | ok w |>
                    .ok => |w| {
                        const result_2 = koru_app.koru_net.read_event.handler(.{ .conn = w });
                        _ = &result_2;
                        switch (result_2) {
                            // >>> BRANCH: tests/regression/600_STDLIB/620_FMT/620_003_fmt_ln_mid_chain_result_collision/input.k:24  | ok r |>
                            .ok => |r| {
                                const result_3 = koru_app.koru_net.shutdown_event.handler(.{ .conn = r.conn });
                                _ = &result_3;
                                switch (result_3) {
                                    // >>> BRANCH: tests/regression/600_STDLIB/620_FMT/620_003_fmt_ln_mid_chain_result_collision/input.k:25  | ok |>
                                    .ok => {
                                    },
                                    // >>> BRANCH: tests/regression/600_STDLIB/620_FMT/620_003_fmt_ln_mid_chain_result_collision/input.k:26  | err _auto_6 |>
                                    .err => |_| {
                                    },
                                }
                            },
                            // >>> BRANCH: tests/regression/600_STDLIB/620_FMT/620_003_fmt_ln_mid_chain_result_collision/input.k:27  | err _auto_7 |>
                            .err => |_| {
                            },
                        }
                    },
                    // >>> BRANCH: tests/regression/600_STDLIB/620_FMT/620_003_fmt_ln_mid_chain_result_collision/input.k:28  | err _auto_8 |>
                    .err => |_| {
                    },
                }
            },
            // >>> BRANCH: tests/regression/600_STDLIB/620_FMT/620_003_fmt_ln_mid_chain_result_collision/input.k:29  | 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_app = struct {
    pub const koru_net = struct {
        const std = @import("std");
        pub const connect_event = struct {
            pub const Input = struct {
                host: []const u8,
            };
            pub const Output = union(enum(u8)) {
                ok: i32,
                err: []const u8,
            };
            pub fn handler(__koru_event_input: @This().Input) @This().Output {
                // >>> PROC: connect  [/Users/larsde/src/koru/tests/regression/600_STDLIB/620_FMT/620_003_fmt_ln_mid_chain_result_collision/net.kz:12]
                const host = __koru_event_input.host;
                _ = &host;
                _ = &__koru_event_input;

                    _ = &host;
                    return .{ .ok = 7 };

            }
        };
        pub const write_event = struct {
            pub const Input = struct {
                conn: i32,
                data: []const u8,
            };
            pub const Output = union(enum(u8)) {
                ok: i32,
                err: []const u8,
            };
            pub fn handler(__koru_event_input: @This().Input) @This().Output {
                // >>> PROC: write  [/Users/larsde/src/koru/tests/regression/600_STDLIB/620_FMT/620_003_fmt_ln_mid_chain_result_collision/net.kz:21]
                const conn = __koru_event_input.conn;
                const data = __koru_event_input.data;
                _ = &conn;
                _ = &data;
                _ = &__koru_event_input;

                    std.debug.print("write: {s}\n", .{data});
                    return .{ .ok = conn };

            }
        };
        pub const read_event = struct {
            pub const Input = struct {
                conn: i32,
            };
            pub const Output = union(enum(u8)) {
                ok: struct {
                    conn: i32,
                    n: i32,
                },
                err: []const u8,
            };
            pub inline fn handler(__koru_event_input: @This().Input) @This().Output {
                return __koru_handler_impl(__koru_event_input.conn);
            }
            fn __koru_handler_impl(__koru_p_0: i32) @This().Output {
                const __koru_event_input: @This().Input = .{ .conn = __koru_p_0 };
                // >>> PROC: read  [/Users/larsde/src/koru/tests/regression/600_STDLIB/620_FMT/620_003_fmt_ln_mid_chain_result_collision/net.kz:30]
                const conn = __koru_event_input.conn;
                _ = &conn;
                _ = &__koru_event_input;

                    std.debug.print("read from conn {d}\n", .{conn});
                    return .{ .ok = .{ .conn = conn, .n = 42 } };

            }
        };
        pub const shutdown_event = struct {
            pub const Input = struct {
                conn: i32,
            };
            pub const Output = union(enum(u8)) {
                ok: struct {
                },
                err: []const u8,
            };
            pub inline fn handler(__koru_event_input: @This().Input) @This().Output {
                return __koru_handler_impl(__koru_event_input.conn);
            }
            fn __koru_handler_impl(__koru_p_0: i32) @This().Output {
                const __koru_event_input: @This().Input = .{ .conn = __koru_p_0 };
                // >>> PROC: shutdown  [/Users/larsde/src/koru/tests/regression/600_STDLIB/620_FMT/620_003_fmt_ln_mid_chain_result_collision/net.kz:39]
                const conn = __koru_event_input.conn;
                _ = &conn;
                _ = &__koru_event_input;

                    std.debug.print("shutdown conn {d}\n", .{conn});
                    return .{ .ok = .{} };

            }
        };
    };
};
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());
}

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 app_net_connect_event {
    public struct Input {
      public string host;
    }
    public struct Output {
      public string tag;
      public int ok;
      public string err;
    }
    public static Output handler(Input __koru_input) {
      var host = __koru_input.host;
      _ = host;
      return new Output { tag = "ok", ok = 7 };

      return default;

    }
  }
  public static class app_net_write_event {
    public struct Input {
      public int conn;
      public string data;
    }
    public struct Output {
      public string tag;
      public int ok;
      public string err;
    }
    public static Output handler(Input __koru_input) {
      var conn = __koru_input.conn;
      var data = __koru_input.data;
      __koru_stdout_write($"write: {data}\n");
      return new Output { tag = "ok", ok = conn };

      return default;

    }
  }
  public static class app_net_read_event {
    public struct Input {
      public int conn;
    }
    public struct Output {
      public string tag;
      public ok_payload ok;
      public string err;
    }
    public struct ok_payload {
      public int conn;
      public int n;
    }
    public static Output handler(Input __koru_input) {
      var conn = __koru_input.conn;
      __koru_stdout_write($"read from conn {conn}\n");
      return new Output { tag = "ok", ok = new ok_payload { conn = conn, n = 42 } };

      return default;

    }
  }
  public static class app_net_shutdown_event {
    public struct Input {
      public int conn;
    }
    public struct Output {
      public string tag;
      public object ok;
      public string err;
    }
    public static Output handler(Input __koru_input) {
      var conn = __koru_input.conn;
      __koru_stdout_write($"shutdown conn {conn}\n");
      return new Output { tag = "ok", ok = new { } };

      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 result_0 = main_module.app_net_connect_event.handler(new app_net_connect_event.Input { host = (string)("localhost")});
    if (result_0.tag == "ok") {
      var c = result_0.ok;
var req = new { text = $"GET /conn/{(c)}" };
      var result_1 = main_module.app_net_write_event.handler(new app_net_write_event.Input { conn = (int)(c), data = (string)(req.text)});
      if (result_1.tag == "ok") {
        var w = result_1.ok;
        var result_2 = main_module.app_net_read_event.handler(new app_net_read_event.Input { conn = (int)(w)});
        if (result_2.tag == "ok") {
          var r = result_2.ok;
          var result_3 = main_module.app_net_shutdown_event.handler(new app_net_shutdown_event.Input { conn = (int)(r.conn)});
          if (result_3.tag == "ok") {
          }
          if (result_3.tag == "err") {
            var _auto_6 = result_3.err;
          }
        }
        if (result_2.tag == "err") {
          var _auto_7 = result_2.err;
        }
      }
      if (result_1.tag == "err") {
        var _auto_8 = result_1.err;
      }
    }
    if (result_0.tag == "err") {
      var _auto_9 = result_0.err;
    }
  }
  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 { });
  }
}

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