tap shorthand syntax

// ============================================================================
// VERIFIED REGRESSION TEST - DO NOT MODIFY WITHOUT DISCUSSION
// ============================================================================
// Test 505: Tap shorthand syntax
// Tests that `~tap(event)` is equivalent to `~tap(event -> *)`
// The shorthand omits `-> *` when observing all branches.

~import "$std/io"
~import "$std/taps"

// Simple event with one branch we care about
~event ping {}
| pong { msg: []const u8 }

~proc ping {
    return .{ .pong = .{ .msg = "Pong!" } };
}

// SHORTHAND: ~tap(ping) instead of ~tap(ping -> *)
~tap(ping)
| pong _ |> std.io:println(text: "Tap observed pong")

// Main flow
~ping()
| pong p |> std.io:println(text: p.msg)