007 tap visibility delegation

// Test 430_007: Tap Visibility with Delegation
//
// CRITICAL TEST: Proves taps fire correctly with abstract/override pattern.
//
// When override delegates to .default:
// - Tap on `process` fires (override runs)
// - Tap on `process.default` fires (default runs via delegation)
//
// This ensures the `.default` rename doesn't hide calls from the tap system!

~import "$std/io"

const std = @import("std");

// Define abstract event
~[abstract] event process { value: i32 }
| result { output: i32 }

// Default implementation: double the value
~process = result { output: value * 2 }

// Override: delegate to default, then add 10
~process = process.default(value: value) | result r |> result { output: r.output + 10 }

// Tap on the PUBLIC handler (override)
~tap(* -> process)
| result |> io.println(message: "tap:process fired")

// Tap on the DEFAULT handler
~tap(* -> process.default)
| result |> io.println(message: "tap:process.default fired")

// Call it: process(5) should give (5 * 2) + 10 = 20
// AND both taps should fire!
~process(value: 5)
| result |> io.println(message: "done")