Infinitable (Rust)

Infinitable is a simple library for introducing the notion of "infinity" and "negative infinity" to numeric types, such as integers, that do not have infinite values.

A representation of infinity is useful for graph algorithms such as Dijkstra's algorithm, as well as for representing a graph with an adjacency matrix.

Usage

Simply install the infinitable crate, available on Crates.io.

```rust extern crate infinitable; use infinitable::Infinitable;

fn main() { let finite = Infinitable::Finite(5); let infinity = Infinitable::Infinity; let negative_infinity = Infinitable::NegativeInfinity;

assert!(finite < infinity);
assert!(finite > negative_infinity);

} ```

Tests

Tests are in the tests directory. Simply run cargo test.

Note About Floating-Point Numbers

Infinitable does not account for existing infinite values in floating-point numeric types. The infinity provided by Infinitable compares greater than all existing values, and the negative infinity provided by Infinitable compares less than all existing values.

To illustrate, here are some values listed from least to greatest:

• Infinitable NegativeInfinity
• Floating-point negative infinity
• Floating-point zero
• Floating-point infinity
• Infinitable Infinity

License

Infinitable is available under the 2-clause BSD license. Refer to LICENSE.txt for details.