https://github.com/xzebra/zeno

Math expression parser written in Go
https://github.com/xzebra/zeno

calculator latex math-expression-parser postfix

Last synced: 2 months ago
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Math expression parser written in Go

• Host: GitHub
• URL: https://github.com/xzebra/zeno
• Owner: xzebra
• License: mit
• Created: 2019-06-21T22:21:02.000Z (almost 7 years ago)
• Default Branch: master
• Last Pushed: 2019-07-11T15:45:30.000Z (over 6 years ago)
• Last Synced: 2024-11-16T07:01:09.343Z (over 1 year ago)
• Topics: calculator, latex, math-expression-parser, postfix
• Language: Go
• Size: 25.4 KB
• Stars: 3
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          
# zeno

[![Build Status](https://travis-ci.com/xzebra/zeno.svg?branch=master)](https://travis-ci.com/xzebra/zeno) [![GoDoc](https://godoc.org/github.com/xzebra/zeno?status.svg)](https://godoc.org/github.com/xzebra/zeno) [![Go Report Card](https://goreportcard.com/badge/github.com/xzebra/zeno)](https://goreportcard.com/report/github.com/xzebra/zeno)

**zeno** is a math expression parser capable of:

- Generating a postfix equivalent to given expression

- Create a binary operation tree

- Calculate the result of the expression (without variables)

- Generate LaTeX representation of an operation tree

## Install

Use golang package manager to install zeno

````

$ go get -u github.com/xzebra/zeno

````

## Usage

````go

import "github.com/xzebra/zeno"

int main() {

    expression := "-2.1483*3.14^3+4"

    // Get a postfix representation of the expression

    postfix, _ := zeno.ToPostfix(expression)

    fmt.Println(postfix) // "-2.1483 3.14 3 ^ * 4 +"

    // Get the binary tree representation

    tree, _ := zeno.PostfixToTree(postfix)

    // You can also get it using ToTree

    tree, _ = zeno.ToTree(expression)

    // After that you can get the result (if the expression 

    // doesn't have variables) or its LaTeX representation.

    fmt.Println(tree.Calculate()) // -62.509529055200005

    fmt.Println(tree.LaTeX()) // "neg(2.1483)\cdot3.14^3+4"

}

````

## Contributing

Pull requests are welcome. For major changes, please open an issue first to discuss what you would like to change. Remember to update tests according to the changes.

## License

[MIT](https://github.com/xzebra/zeno/blob/master/LICENSE)