subflow flow

// ============================================================================
// VERIFIED REGRESSION TEST - DO NOT MODIFY WITHOUT DISCUSSION
// ============================================================================
// Test: Flow-based subflow calling another event
// Feature: ~event_name = other_event(args) | branch |> result { fields }
// Verifies: Subflow can invoke events and map their outputs
// ============================================================================

const std = @import("std");

~import std/io

// Helper event: doubles a number
~tor double { value: i32 } -> i32

~proc double|zig {
    return value * 2;
}

// Event to test
~tor process { input: i32 } -> i32

// Subflow: calls double and maps its output
~process = double(value: input): r -> r

// Helper to print i32
~tor print-result { value: i32 }

~proc print-result|zig {
    std.debug.print("{}\n", .{value});
}

// Test: 21 * 2 = 42
~process(input: 21): f |> print-result(value: f)