abacus 0.0.1

The mathemagical programming language
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# Abacus

![build](https://github.com/cyanboy/abacus/actions/workflows/build.yml/badge.svg)

Abacus is a small, expressive calculator language for quick experiments and teaching functional programming ideas. It pairs a friendly REPL with pattern-matched functions so you can sketch algorithms without bootstrapping a full Rust project.

---

## Install

### Cargo

```bash
cargo install abacus
```

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## Try It

Run the REPL with `abc`:

```abacus
Abacus - Calculator REPL
Type expressions or 'quit' to exit

> rate = 0.0825
> with_tax(amount) = amount * (1 + rate)
> with_tax(24.99)
27.05475
> fib(0) = 0
> fib(1) = 1
> fib(n) = fib(n-1) + fib(n-2)
> fib(10)
55
> odd(n) = n % 2 == 1
> odd(41)
true
```

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## Highlights

- Persistent REPL environment with history and an ANSI-colored prompt.
- 64-bit integers, double-precision floats, and booleans with straightforward formatting.
- Arithmetic, comparison, logical, and bitwise operators with predictable precedence.
- Pattern-matched function arms: mix literals and identifiers and the most specific match runs.
- Helpful diagnostics that underline exactly where evaluation failed.

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## Build From Source

```bash
cargo build
```

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## License

This project is licensed under the [MIT License](./LICENSE.md).