141 cond string guard dispatch

✓ Passing This code compiles and runs correctly.

Code

// Pins: `cond` arms guarded by string equality against literals, on BOTH
// targets — the app-router shape of 320_137 with the scrutinee a STRING,
// not a numeric code. Before string `==` reached the Zig target, exactly
// this router had to stamp numeric codes into its markup to dispatch.
import std/io

tor page-route { page: string }
| catalog
| progress
| other

page-route = cond(page)
| c p when p == "catalog" => catalog
| c p when p == "progress" => progress
| c _ => other

page-route(page: "catalog")
| catalog |> std/io:print.ln("catalog")
| progress |> std/io:print.ln("progress")
| other |> std/io:print.ln("other")

page-route(page: "progress")
| catalog |> std/io:print.ln("catalog")
| progress |> std/io:print.ln("progress")
| other |> std/io:print.ln("other")

page-route(page: "missing")
| catalog |> std/io:print.ln("catalog")
| progress |> std/io:print.ln("progress")
| other |> std/io:print.ln("other")

input.k

Supporting Files

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a_cs_equiv.runtimeconfig.json

catalog
progress
other

actual.cs.txt

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koru.csproj

//------------------------------------------------------------------------------
// <auto-generated>
//     This code was generated by a tool.
//
//     Changes to this file may cause incorrect behavior and will be lost if
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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 page_route_event {
    public struct Input {
      public string page;
    }
    public struct Output {
      public string tag;
      public dynamic catalog;
      public dynamic progress;
      public dynamic other;
    }
    public static Output handler(Input __koru_input) {
      var page = __koru_input.page;
var p = page; 
    if (p == "catalog") {
        {         return new Output { tag = "catalog" };
 }
    } else if (p == "progress") {
        {         return new Output { tag = "progress" };
 }
    } else {
        {         return new Output { tag = "other" };
 }
    }

      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 class cond_event {
    public struct Input {
      public dynamic expr;
    }
    public struct Output {
      public string tag;
      public dynamic c;
    }
    public static Output handler(Input __koru_input) {
      var expr = __koru_input.expr;
      throw new global::System.Exception("cond: |template| proc is inlined at call sites and must never be called");
    }
  }
  public static void flow0() {
    var result_0 = main_module.page_route_event.handler(new page_route_event.Input { page = (string)("catalog")});
    if (result_0.tag == "catalog") {
__koru_stdout_write("catalog" + "\n");
    }
    if (result_0.tag == "progress") {
__koru_stdout_write("progress" + "\n");
    }
    if (result_0.tag == "other") {
__koru_stdout_write("other" + "\n");
    }
  }
  public static void flow1() {
    var result_1 = main_module.page_route_event.handler(new page_route_event.Input { page = (string)("progress")});
    if (result_1.tag == "catalog") {
__koru_stdout_write("catalog" + "\n");
    }
    if (result_1.tag == "progress") {
__koru_stdout_write("progress" + "\n");
    }
    if (result_1.tag == "other") {
__koru_stdout_write("other" + "\n");
    }
  }
  public static void flow2() {
    var result_2 = main_module.page_route_event.handler(new page_route_event.Input { page = (string)("missing")});
    if (result_2.tag == "catalog") {
__koru_stdout_write("catalog" + "\n");
    }
    if (result_2.tag == "progress") {
__koru_stdout_write("progress" + "\n");
    }
    if (result_2.tag == "other") {
__koru_stdout_write("other" + "\n");
    }
  }
}

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

output_emitted.cs

Actual

catalog
progress
other

Expected output

✓ Zig✓ JavaScript✓ C#

catalog
progress
other

Flows

subflow ~page-route click a branch to expand · @labels scroll to their anchor

cond (page)

flow ~page-route click a branch to expand · @labels scroll to their anchor

page-route (page: "catalog")

flow ~page-route click a branch to expand · @labels scroll to their anchor

page-route (page: "progress")

flow ~page-route click a branch to expand · @labels scroll to their anchor

page-route (page: "missing")

Test Configuration

MUST_RUN LANGUAGES: zig js cs

← 140 string equality if dispatch 142 when guard string payload →