https://github.com/jlervin/shodan

A REPL calculator implemented in Go
https://github.com/jlervin/shodan

go grammars parsing repl scanning

Last synced: about 1 month ago
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A REPL calculator implemented in Go

• Host: GitHub
• URL: https://github.com/jlervin/shodan
• Owner: JLErvin
• Created: 2019-09-01T06:45:26.000Z (over 5 years ago)
• Default Branch: master
• Last Pushed: 2019-09-07T04:33:34.000Z (over 5 years ago)
• Last Synced: 2024-06-21T17:03:52.885Z (6 months ago)
• Topics: go, grammars, parsing, repl, scanning
• Language: Go
• Size: 1.02 MB
• Stars: 1
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        


    
shodan






Welcome to my world, insect.

`shodan` is a simple REPL calculator implemented in `go` - named after the infamous articial intelligence

from the 1994 video game `System Shock`.

## Features

`shodan` is a fast, command-line calculator.

I wrote it primarly as a way to get experience with `go`, scanning, parsing, and grammars.

The program using recursive descent parsing and scans lines in linear time.

## Grammar

`shodan` is defined using the following grammar:

```

 ::=  |  

 ::=  |  =  | clear  | list | quit | exit

 ::=  |  +  |  - 

 ::=  |   *  |  / 

 ::=  |   ** 

 ::=  |  | () | sqrt() | sin() | cos() tan()

             arcsin() | arccos() | arctan() | log() | ln() | abs()

```