Version 0.6.1 is available upstream. Please consider updating! It seems that version 0.6.1 is available upstream, while the latest version in the Gentoo tree is 0.4.3. You think this warning is false? Read more about it here.
Dex is a library supporting "Deferred Execution" with the explicit
goal of integrating with GNOME and GTK-based applications.
It provides primatives for supporting futures in a variety of ways
with both read-only and writable views. Additionally, integration
with existing asynchronous-based APIs is provided through the use
of wrapper promises.