146 body modulo signed

✓ Passing This code compiles and runs correctly.

Code

// Pins: Koru `%` on a signed runtime value in a BODY-position expression, on
// BOTH targets — `-> n % 2`, which reaches Zig as the handler's `return`
// expression (see 320_144 for the operator's meaning and spelling).
//
// The hand-off through `via` is what keeps `n` RUNTIME: a literal call site
// const-folds, and the body it folded away is never analyzed by the backend, so
// the pin would pass with the operator never reaching a host.
import std/io

pub tor rem2 { n: i32 } -> i32

rem2 -> n % 2

pub tor via { n: i32 } -> i32

via = rem2(n): r -> r

via(n: 7): a |> std/io:print.ln("rem={{ a:d }}")
via(n: 8): b |> std/io:print.ln("rem={{ b:d }}")

input.k

Supporting Files

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a_cs_equiv.deps.json

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a_cs_equiv.runtimeconfig.json

rem=1
rem=0

actual.cs.txt

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</Project>

koru.csproj

//------------------------------------------------------------------------------
// <auto-generated>
//     This code was generated by a tool.
//
//     Changes to this file may cause incorrect behavior and will be lost if
//     the code is regenerated.
// </auto-generated>
//------------------------------------------------------------------------------

using System;
using System.Reflection;

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obj/Debug/net8.0/koru.csproj.FileListAbsolute.txt

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obj/koru.csproj.nuget.g.props

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obj/koru.csproj.nuget.g.targets

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obj/project.nuget.cache

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);
  public static class rem2_event {
    public struct Input {
      public int n;
    }
    public static int handler(Input __koru_input) {
      var n = __koru_input.n;
      return (int)(n % 2);
    }
  }
  public static class via_event {
    public struct Input {
      public int n;
    }
    public static int handler(Input __koru_input) {
      var n = __koru_input.n;
      var r = main_module.rem2_event.handler(new rem2_event.Input { n = (int)(n)});
      return (int)(r);

      return default;
    }
  }
  public static class ln_event {
    public struct Input {
      public dynamic expr;
      public dynamic invocation;
      public dynamic item;
      public dynamic program;
      public dynamic reporter;
      public dynamic allocator;
    }
    public static dynamic handler(Input __koru_input) {
      var expr = __koru_input.expr;
      var invocation = __koru_input.invocation;
      var item = __koru_input.item;
      var program = __koru_input.program;
      var reporter = __koru_input.reporter;
      var allocator = __koru_input.allocator;
      throw new global::System.Exception("ln: [transform] tor is lowered at compile time and must never be called");

    }
  }
  public static void flow0() {
    var a = main_module.via_event.handler(new via_event.Input { n = (int)(7)});
__koru_stdout_write("rem=" + (a) + "\n");
  }
  public static void flow1() {
    var b = main_module.via_event.handler(new via_event.Input { n = (int)(8)});
__koru_stdout_write("rem=" + (b) + "\n");
  }
}

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

output_emitted.cs

Actual

rem=1
rem=0

Expected output

✓ Zig✓ JavaScript✓ C#

rem=1
rem=0

Flows

subflow ~via click a branch to expand · @labels scroll to their anchor

rem2 (n)

flow ~via click a branch to expand · @labels scroll to their anchor

via (n: 7)

flow ~via click a branch to expand · @labels scroll to their anchor

via (n: 8)

Test Configuration

MUST_RUN LANGUAGES: zig js cs

← 145 when guard modulo payload 147 optional string equality →