054 strbranch under for each

// 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 {
    // >>> FLOW: tests/regression/670_NESTING_SWEEP/670_054_strbranch_under_for_each/input.k:9  ~std.control:for()
    pub fn flow0() void {
        
    for (0..3) |__koru_item2| {
        { const _auto_6 = __koru_item2; _ = &_auto_6;         const result_e0_0 = koru_std.koru_string.from_page_event.handler(.{ .text = "x" });
        _ = &result_e0_0;
        switch (result_e0_0) {
            // >>> BRANCH: tests/regression/670_NESTING_SWEEP/670_054_strbranch_under_for_each/input.k:11  | ok s |>
            .ok => |s| {
                (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("ok\n", .{});
                _ = koru_std.koru_string.free_event.handler(.{ .s = s });
            },
            // >>> BRANCH: tests/regression/670_NESTING_SWEEP/670_054_strbranch_under_for_each/input.k:12  | err _auto_7 |>
            .err => |_| {
                (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("err\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_std = struct {
    pub const koru_string = struct {
        const std = @import("std");
        pub const String = struct {
            data: []u8,
            allocator: std.mem.Allocator,
            pub fn slice(self: String) []const u8 {
                return self.data;
            }
            fn deinit(self: String) void {
                self.allocator.free(self.data);
            }
        };
        pub const from_page_event = struct {
            pub const Input = struct {
                text: []const u8,
            };
            pub const Output = union(enum(u8)) {
                ok: *koru_std.koru_string.String,
                err: []const u8,
            };
            pub fn handler(__koru_event_input: @This().Input) @This().Output {
                // >>> PROC: from_page  [/Users/larsde/src/koru/koru_std/string.kz:54]
                const text = __koru_event_input.text;
                _ = &text;
                _ = &__koru_event_input;

                    const allocator = koru_allocator();
                    const data = allocator.alloc(u8, text.len) catch {
                        return .{ .err = "allocation failed" };
                    };
                    @memcpy(data, text);

                    const s = allocator.create(String) catch {
                        allocator.free(data);
                        return .{ .err = "allocation failed" };
                    };
                    s.* = .{ .data = data, .allocator = allocator };
                    return .{ .ok = s };

            }
        };
        pub const take_event = struct {
            pub const Input = struct {
                s: *koru_std.koru_string.String,
            };
            pub const Output = *koru_std.koru_string.String;
            pub fn handler(__koru_event_input: @This().Input) @This().Output {
                const s = __koru_event_input.s;
                _ = &s;
                return s;
            }
        };
        pub const release_event = struct {
            pub const Input = struct {
                s: *koru_std.koru_string.String,
            };
            pub const Output = *koru_std.koru_string.String;
            pub fn handler(__koru_event_input: @This().Input) @This().Output {
                const s = __koru_event_input.s;
                _ = &s;
                return s;
            }
        };
        pub const free_event = struct {
            pub const Input = struct {
                s: *koru_std.koru_string.String,
            };
            pub const Output = void;
            pub fn handler(__koru_event_input: @This().Input) @This().Output {
                // >>> PROC: free  [/Users/larsde/src/koru/koru_std/string.kz:91]
                const s = __koru_event_input.s;
                _ = &s;
                _ = &__koru_event_input;

                    s.allocator.free(s.data);
                    s.allocator.destroy(s);

            }
        };
        pub const len_event = struct {
            pub const Input = struct {
                s: *koru_std.koru_string.String,
            };
            pub const Output = usize;
            pub fn handler(__koru_event_input: @This().Input) @This().Output {
                const s = __koru_event_input.s;
                _ = &s;
                return s.data.len;
            }
        };
    };
};
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(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 std_string_from_page_event {
    public struct Input {
      public string text;
    }
    public struct Output {
      public string tag;
      public dynamic ok;
      public string err;
    }
    public static Output handler(Input __koru_input) {
      var text = __koru_input.text;
      return new Output { tag = "ok", ok = new __KoruBox { data = text } };

      return default;

    }
  }
  public static class std_string_take_event {
    public struct Input {
      public dynamic s;
    }
    public static dynamic handler(Input __koru_input) {
      var s = __koru_input.s;
      return (dynamic)(s);
    }
  }
  public static class std_string_release_event {
    public struct Input {
      public dynamic s;
    }
    public static dynamic handler(Input __koru_input) {
      var s = __koru_input.s;
      return (dynamic)(s);
    }
  }
  public static class std_string_free_event {
    public struct Input {
      public dynamic s;
    }
    public static dynamic handler(Input __koru_input) {
      var s = __koru_input.s;
      // GC is the implementation. There is no allocator to hand the bytes back
      // to, so the honest body is empty — this is a port, not a stub.

      return default;

    }
  }
  public static class std_string_len_event {
    public struct Input {
      public dynamic s;
    }
    public static long handler(Input __koru_input) {
      var s = __koru_input.s;
      return (long)(s.data.Length);
    }
  }
  public static class std_control_for_event {
    public struct Input {
      public dynamic expr;
      public dynamic keep;
    }
    public struct Output {
      public string tag;
      public dynamic done;
    }
    public interface IOps {
      void each(dynamic __koru_arg);
    }
    public static Output handler<H>(Input __koru_input, H ops) where H : struct, IOps {
      void each(dynamic __koru_arg) => ops.each(__koru_arg);
      var expr = __koru_input.expr;
      var keep = __koru_input.keep;
      throw new global::System.Exception("for: |template| proc is inlined at call sites and must never be called");
    }
  }
  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() {
for (long __koru_item2 = 0; __koru_item2 < 3; __koru_item2++) {
        { var _auto_6 = __koru_item2;       var result_0 = main_module.std_string_from_page_event.handler(new std_string_from_page_event.Input { text = (string)("x")});
      if (result_0.tag == "ok") {
        var s = result_0.ok;
__koru_stdout_write("ok" + "\n");
        {
          var __koru_p_s = s;
          // GC is the implementation. There is no allocator to hand the bytes back
          // to, so the honest body is empty — this is a port, not a stub.
        }
      }
      if (result_0.tag == "err") {
        var _auto_7 = result_0.err;
__koru_stdout_write("err" + "\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 { });
  }
}

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