# surjective-enum
Rust macro to derive a surjective mapping from enum representation to enum.

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Derive a surjective ::core::convert::From<Unitary Enum Representation> conversion function
which maps all values which are not part of the enumeration to the last
enum discriminant.

The example
``` rust
use surjective_enum::From;
#[repr(u8)]
#[derive(From)]
pub enum Enum {
	Bar  = 0b00,
	Foo  = 0b01,
	Rest = 0b11
}
```
will create a from(u8) -> Enum conversion function which maps
 0 -> Bar, 1 -> Foo and all other values to Rest.