labs-jsep

##jsep: A Tiny JavaScript Expression Parser jsep is a simple expression parser written in JavaScript. It can parse JavaScript expressions but not operations. The difference between expressions and operations is akin to the difference between a cell in an Excel spreadsheet vs. a proper JavaScript program.

###Why jsep? I wanted a lightweight, tiny parser to be included in one of my other libraries. esprima and other parsers are great, but had more power than I need and were way too large to be included in a library that I wanted to keep relatively small.

jsep's output is almost identical to esprima's, which is in turn based on SpiderMonkey's.

###Custom Build First, install Grunt. While in the jsep project directory, run:

npm install .
grunt

The jsep built files will be in the build/ directory.

###Usage ####Client-side ... var parse_tree = jsep("1 + 1"); ####Node.JS First, run npm install jsep. Then, in your source file:

var jsep = require("jsep");
var parse_tree = jsep("1 + 1");

####Custom Operators // Add a custom ^ binary operator with precedence 10 jsep.addBinaryOp("^", 10);

// Add a custom @ unary operator with precedence 10
jsep.addUnaryOp('@');

// Remove a binary operator
jsep.removeBinaryOp(">>>");

// Remove a unary operator
jsep.removeUnaryOp("~");

###License jsep is under the MIT license. See LICENSE file.

###Thanks Some parts of the latest version of jsep were adapted from the esprima parser.