016 optional branches ignored

// ============================================================================
// Test 065: Optional Branches Are Truly Optional
// Tests that optional branches can be COMPLETELY IGNORED (no |? catch-all needed)
// This is the killer feature - they're truly optional!
// ============================================================================

const std = @import("std");

// Event with required and optional branches
~event process { value: u32 }
| success { result: u32 }        // REQUIRED - must be handled
| ?warning { msg: []const u8 }   // OPTIONAL - can be ignored!
| ?debug { details: []const u8 } // OPTIONAL - can be ignored!

// Proc that can return any branch
~proc process {
    if (value > 100) {
        return .{ .warning = .{ .msg = "Large value" } };
    }
    if (value % 2 == 1) {
        return .{ .debug = .{ .details = "Odd value" } };
    }
    std.debug.print("Success: {}\n", .{value * 2});
    return .{ .success = .{ .result = value * 2 } };
}

// Flow that ONLY handles required branch - optional branches are ignored!
// This should compile and run - warning/debug branches are silently ignored
~process(value: 10)
| success _ |> _
// NO |? catch-all needed!
// NO | warning w |> needed!
// NO | debug d |> needed!
// They're truly optional - silent no-op if they fire!