nested labels

// Test 828: Nested label loops
//
// BUG: When labels are nested (label within a label), the compiler generates
// tail calls to label functions but doesn't actually generate those functions.
//
// This causes "use of undeclared identifier" errors for label functions.

const std = @import("std");

~event outer { count: i32 }
| continue_outer { next: i32 }
| done_outer {}

~event inner { count: i32 }
| continue_inner { next: i32 }
| done_inner {}

~proc outer {
    std.debug.print("Outer: {}\n", .{count});
    if (count < 2) {
        return .{ .@"continue_outer" = .{ .next = count + 1 } };
    }
    return .{ .@"done_outer" = .{} };
}

~proc inner {
    std.debug.print("  Inner: {}\n", .{count});
    if (count < 2) {
        return .{ .@"continue_inner" = .{ .next = count + 1 } };
    }
    return .{ .@"done_inner" = .{} };
}

// Nested labels: #outer contains #inner
~#outer outer(count: 0)
| continue_outer o |> #inner inner(count: 0)
    | continue_inner i |> @inner(count: i.next)
    | done_inner |> @outer(count: o.next)
| done_outer |> _