1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
//! This crate, in conjunction with the `verify_macro` crate, aims to facilitate the development of
//! formally verifiable rust code.
//!
//! Type level programming allows us to implement logic that can be verified by the compiler, which
//! makes it possible to catch bugs at compile time, rather than at runtime.
//!
//! Say we have an algorithm who's runtime scales exponentially. We would like to be able to
//! restrict the number of elements in our working set to a reasonable number, let's say 128, in
//! order to ensure that the algorithm completes in a reasonable amount of time, every time.
//!
//! ```compile_fail
//! use verified::*;
//!
//! #[derive(Default)]
//! struct Collection<E, Size: Unsigned> {
//!     elements: Vec<E>,
//!     size: Size,
//! }
//!
//! #[verify]
//! fn slow_routine<E, Size: Unsigned>(working_set: Collection<E, Size>)
//! where
//!     // Restrict the size of the working set.
//!     _: Verify<{ Size < 128 }, { Size > 0 }>
//! {
//!     // TODO
//! }
//!
//! fn main() {
//!     // No problem here...
//!     slow_routine::<String, U1>(Default::default());
//!     slow_routine::<String, U127>(Default::default());
//!
//!     // XXX: Does not compile because our working set is empty.
//!     slow_routine::<String, U0>(Default::default());
//!
//!     // XXX: Does not compile because our working set is one element too large.
//!     slow_routine::<String, U128>(Default::default());
//! }
//! ```
pub use std::ops::{Add, BitAnd, BitOr, BitXor, Div, Mul, Not, Rem, Shl, Shr};
pub use typenum::*;
pub use verify_macro::verify;

#[cfg(test)]
mod tests {
    #[test]
    fn it_works() {
        assert_eq!(2 + 2, 4);
    }
}