labels and jumps

// ============================================================================
// VERIFIED REGRESSION TEST - DO NOT MODIFY WITHOUT DISCUSSION
// ============================================================================
// Test 013: Labels and jumps (looping mechanism)
// Tests SPEC.md lines 293-294, 332-336
// ============================================================================

const std = @import("std");

// Event for counting iteration
~event count { current: i32, target: i32 }
| next { value: i32, target: i32 }
| done i32

~proc count|zig {
    std.debug.print("Count: {}\n", .{current});

    if (current < target) {
        return .{ .next = .{ .value = current + 1, .target = target } };
    } else {
        return .{ .done = current };
    }
}

// Flow using labels and jumps to loop
~#loop count(current: 1, target: 5)
| next n |> @loop(current: n.value, n.target)
| done _ |> _