https://github.com/tteeoo/aetg

➗ Arithmetic expression tree generator (essentially a simple calculator in the command line)
https://github.com/tteeoo/aetg

arithmetic calculator command-line go golang math parser syntax-tree tree tree-structure

Last synced: about 2 months ago
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➗ Arithmetic expression tree generator (essentially a simple calculator in the command line)

• Host: GitHub
• URL: https://github.com/tteeoo/aetg
• Owner: tteeoo
• License: mit
• Created: 2020-06-21T23:22:38.000Z (over 4 years ago)
• Default Branch: master
• Last Pushed: 2020-06-23T00:31:53.000Z (over 4 years ago)
• Last Synced: 2024-06-20T19:20:29.713Z (7 months ago)
• Topics: arithmetic, calculator, command-line, go, golang, math, parser, syntax-tree, tree, tree-structure
• Language: Go
• Homepage:
• Size: 27.3 KB
• Stars: 1
• Watchers: 2
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# aetg

Inspired by [this video](https://www.youtube.com/watch?v=7tCNu4CnjVc).

`aetg` is essentially just a simple calculator with an annoying syntax.

This is mainly just a small project I made to get experience with making trees (and parsing) in Go.

# Usage

`aetg` parses arithmetic expressions into a tree of sub expressions that it then evaluates.

Since I am new to writing lexers/parsers, `aetg` uses a very strict format to notate expressions that is easy to tokenize.

Run the compiled `aetg` binary to enter a shell in which you can type expressions.

Notation is as follows:

`( operator )`

Examples:

`(5 * (3 - 6))`

`(((8.11 + -7) ^ 3) - ((2 | 4) * (5.23 / (5 % 2))))`

The following operators are supported:

* `+` Addition

* `-` Subtraction

* `*` Multiplication

* `/` Division

* `^` Exponentiation

* `%` Modulus

* `|` Radical (`(2 | number)` for square root, etc.)

### Flags

* `--version` Display version information

* `--verbose` Print expressions after parsing

* `--file ` Read and run an expression from a file

* `--expr ` Run a specific expression without going into the shell

# Installation

It's just a single binary.

You can compile with `go build`.

A [Linux binary](https://github.com/tteeoo/aetg/releases/download/0.1.0/aetg-linux) is provided.

# License

All files are licensed under the MIT License