const_type

Define enum-like const-types, but with aliases for variants:

```rust use const_type:: { Const, };

Const! { /// Bar is like enum, but variants might have the same value. /// usize is the default type, so : usize can be omitted in this case. pub Bar: usize { /// Even Variants could be and should be documented. A = 1, B = 2, C = 2, D = Bar::A.0, } }

```

This could be used like this:

rust let Foo: Bar = Bar::B;

Because the enum is actually a struct, implementing traits or methods canbe doneas usually:

rust impl Into < usize > for Bar { fn into ( self ) -> usize { self.0 as usize } }