bnfer

中文文档 document

Parse bnf expressions to a structured json.

• install
• usage
  • API quick run
• develop
  • file structure
  • run tests
• license

install

npm i bnfer --save or npm i bnfer --save-dev

Install on global, using npm i bnfer -g

usage

API quick run

let bnfer = require('bnfer')
let {parse} = bnfer;
let grammer = parse('EXP := num | EXP + num | EXP - num');
console.log(JSON.stringify(grammer, null, 4));

output

    {
        "startSymbol": "EXP",
        "T": [
            "num",
            "+",
            "-"
        ],
        "N": [
            "EXP"
        ],
        "productions": [
            [
                "EXP",
                [
                    "num"
                ]
            ],
            [
                "EXP",
                [
                    "EXP",
                    "+",
                    "num"
                ]
            ],
            [
                "EXP",
                [
                    "EXP",
                    "-",
                    "num"
                ]
            ]
        ]
    }

develop

file structure

.    
│──LICENSE    
│──README.md    
│──README_zh.md    
│──TODO.md    
│──coverage    
│   │──coverage.json    
│   │──lcov-report    
│   │   │──base.css    
│   │   │──bnfer    
│   │   │   │──index.html    
│   │   │   │──index.js.html    
│   │   │   └──src    
│   │   │       │──index.html    
│   │   │       └──index.js.html    
│   │   │──index.html    
│   │   │──prettify.css    
│   │   │──prettify.js    
│   │   │──sort-arrow-sprite.png    
│   │   └──sorter.js    
│   └──lcov.info    
│──index.js    
│──package.json    
│──src    
│   └──index.js    
└──test    
    │──index.js    
    └──math.js     

run tests

npm test

license

MIT License

Copyright (c) 2017 chenjunyu

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.