# type_val
This project allows for the creation
of type-level values. Any value can
be type-level as long as it can be
initialized as a constant. All
type-level values implement the
TypeVal trait, and so can be provided
as type parameters.
## TypeVal
A trait implemented by type-level
values. The value of a TypeVal can
be extracted through the `VAL`
associated constant.
## def_type_val
This macro is used to implement the
TypeVal trait. Any number of values
can be initialized with a single
invocation. Items prefixed by `pub`
are public. Attributes to be applied
to items in a block, including doc
comments, should go above their
targets.
## Example
```rust
def_type_val! {
type One: i32 = 1;
#[derive(Clone, Copy)]
type True: bool = true;
/// Negative one
pub type NegOne: i32 = -1;
pub type False: bool = false;
}
println!("One = {}, True = {}, NegOne = {}, False = {}",
One::VAL,
True::VAL,
NegOne::VAL,
False::VAL);
```
## How to Obtain
This project is available on crates.io [here](https://crates.io/crates/type_val).