RustyDumbTools (v0.1.1)

A collection of simple tools in Rust as Rust modules:

• crate::arg::DumbArgParser: A simple argument parser. It can be useful for handling command line argument parsing for a Rust program.
• crate::calc::DumbCalcProcessor: A simple infix calculation processor It can be used to implement a simple calculator in Rust.

You may also want to refer to the crates.io page about RustyDumbTools.

Demo

For a demo program of using the tools, you may want to run the included demo function rusty_dumb_tools::demo::run_demo like

use rusty_dumb_tools::demo;
demo::run_demo(None);  // get arguments from command-line         

Assuming new Rust project with main.rs like

use rusty_dumb_tools::demo;
fn main() {
    demo::run_demo(None);
}

the demo can be cargo run like

• cargo run -- -h the input demonstrates using DumbArgParser for showing "help message"
• cargo run -- calc -h DumbArgParser is set up to parse arguments for a sub-command (with another DumbArgParser object); and the above input demonstrates showing of "help message" of the sub-command
• cargo run -- calc 1.1 + 2.2 * (4.3 - 2.4) + 5 the above demonstrate how to use a [sub-command] DumbArgParser to parse arguments for the sub-command calc
• cargo run -- calc-repl the above demonstrate how to invoke the sub-command calc-repl
• cargo run -- arg -h
• cargo run -- arg -f 0.2 5 --string2 VAL1 false 1 2 3

The output of running cargo run -- -h:

| USAGE: rusty_dumb_tools [-h] demo
| : Demos of rusty_dumb_tools.
| . -h, --help : HELP
| . demo ... : REQUIRED; e.g. [calc]
|   : a demo
|   : . [calc] : DumbCalcProcessor command-line input demo
|   : . [calc-repl] : DumbCalcProcessor REPL demo
|   : . [arg] : DumbArgParser demo (more like debugging)

The output of running cargo run -- calc -h:

| USAGE: rusty_dumb_tools calc [-h] input
| : DumbCalcProcessor command-line input demo.
| . -h, --help : HELP
| . input ... : REQUIRED; e.g. [123]
|   : infix expression

The output of running cargo run -- calc 1.1 + 2.2 * (4.3 - 2.4) + 5:

|
| = 10.28.
|

After running cargo run -- calc-repl, the demo will get in a loop to get input from the prompt:

* enter an infix expression
* can split the infix expression into multiple lines; e.g. a "unit" a line
* finally, enter "=" (or an empty line) to evaluate it
* can then continue to enter another infix expression ...

>

Thank You!

Greeting from the author Trevor Lee:

Peace be with you! May God bless you! Jesus loves you! Amazing Grace!

License

MIT

Change History:

• v0.1.1

  • added more documentations, and via run_demo function

• v0.1.0

  • initial release