Rust RPN (Reverse Polish Notation) CLI

This tool allows you to calculate the formula of Reverse Polish Notation written in standard input or in a text file.

Features

If you install Cargo, Rust's build system and package manager environment, you can perform the calculation by simply typing the rpncalc command.

In addition, there is an optional feature that display the calculation process.

Requirement

[environment]

• Windows 10
• cargo = "1.60.0"

[dependencies]

• anyhow = "1.0.58"
• clap = "3.2.14"

Installation

You have to install Cargo from The Rust community’s crate registry or rustup.

git clone https://github.com/iorn121/rust_RPN_cli

cargo add clap
cargo add anyhow

cd rust_RPN_cli
cargo install --path .

Usage

stdin

rpncalc

3 4 +
# 7 will be output

text file

echo "4 2 -" > rpn.txt

rpncalc rpn.txt
# 2 will be output

option

rpncalc -v

2 7 + 3 - 7 * 3 /
# ["/", "3", "*", "7", "-", "3", "+", "7"] [2]
# ["/", "3", "*", "7", "-", "3", "+"] [2, 7]
# ["/", "3", "*", "7", "-", "3"] [9]
# ["/", "3", "*", "7", "-"] [9, 3]
# ["/", "3", "*", "7"] [6]
# ["/", "3", "*"] [6, 7]
# ["/", "3"] [42]
# ["/"] [42, 3]
# [] [14]
# 14
# The above will be output

Note

This tool was created in Windows environment, so I have not verified that this will work on Mac or Linux.

Author

• iorn121(Io)
• github: @iorn121
• twitter: @121Tkn
• email: [email protected]
• portfolio: https://iorn121.github.io/

License

This tool is under MIT license.