001 inline flow binding

// Test 107: Inline Flow with Binding Usage
// Tests that bindings capture results and can be used in expressions
const std = @import("std");

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

~proc double = done { result: value * 2 }

~event format { number: i32 }
| done { message: []const u8 }

~proc format {
    // Allocate message (simplified for test)
    const msg = "Value";
    return .{ .done = .{ .message = msg } };
}

~event process { input: i32 }
| done { output: []const u8 }

// Binding captures double's result, then uses it in format
~proc process = double(value: input)
| done doubled |> format(number: doubled.result)
    | done formatted |> done { output: formatted.message }

~event main {}
~proc main {
    const result = process_event.handler(.{ .input = 21 });
    std.debug.print("Output: {s}\n", .{result.done.output});
}

~main()