Add "tagged value" to D for an effective use of std.variant.Algebraic.
Wraps **T** with **tag_**.
Gets the underlying type whitch a **Tag** wraps. If **T** is not a **Tag** it will alias itself to **T**.
Wraps **value** with **tag_**.
See Source File
Add "tagged value" to D for an effective use of std.variant.Algebraic.