nested depth 2

// ============================================================================
// VERIFIED REGRESSION TEST - DO NOT MODIFY WITHOUT DISCUSSION
// ============================================================================
// Test: Nested Continuation Depth 2 (baseline)
// Feature: Flow with 2 levels of nested continuations
// Verifies: Basic nested continuation structure works
// Depth: start |> level1 |> level2 → result
// ============================================================================

const std = @import("std");

// Simple events that add values
~event add_one { value: i32 }
| done { result: i32 }

~proc add_one = done { result: value + 1 }

~event add_two { value: i32 }
| done { result: i32 }

~proc add_two = done { result: value + 2 }

// Chain: start → add_one → add_two → result
// Depth 2: Two nested continuations
~event chain { start: i32 }
| done { result: i32 }

~proc chain = add_one(value: start)
| done a |> add_two(value: a.result)
    | done b |> done { result: b.result }

// Test: 10 + 1 + 2 = 13
pub fn main() void {
    const result = chain_event.handler(.{ .start = 10 });
    std.debug.print("{}\n", .{result.done.result});
}