# Tazui
Tazui is terminal calculator written in Rust.

## Build
Build of Tazui is made by [Rust](https://www.rust-lang.org/) tool [Cargo](https://doc.rust-lang.org/cargo/)

To build Tazui, you can use the following command:

	*cargo build* to compile in debug mode
	*cargo build --release* to compile in release mode

To launch Tazui units tests, you can use the following command:

	*cargo test* to launch tests in debug mode
	*cargo test --release* to launch tests in release mode

## Documentation
Tazui use [Taz]("https://github.com/BaGoA/Taz") library to evaluate expression given by user. To interact with user, we have created a terminal user interface based on [Crossterm]("https://github.com/crossterm-rs/crossterm") library. 

Tazui application can be launched by Cargo with following command:

	*cargo run* to launch in debug mode
	*cargo run --release* to launch in release mode

Then we have following view

![](doc/tazui-start.png)

To quit Tazui application, we can write *quit* or use *ESC* key.

Tazui can work with simple expression and return result in variable named *last*. This can be reused in other expression.

![](doc/tazui-simple-usage.png)

Moreover, we can define variable with an expression. Tazui evaluate it and put result in this variable. Then we can reuse these variables in other expression.

![](doc/tazui-use-variables.png)

We can also define reusable expression. Tazui evaluate it and put it name and current result in variables. Then we can modify variables and the expression is updated automaticaly.

![](doc/tazui-use-expressions.png)