jsepgen

Tiny module (15 LOC) to generate code from the jsep AST.

Example

Convert all variables and functions to an object with the same key

var jsep = require('jsep');
var gen = require('gen');

// parse the expression into an AST
var ast = jsep('-A1 + SUM(A5, A6) + " %"')

// replace variables and functions
var expr = gen(ast, function(node) {
  if (node.type != 'Identifier') return node;
  node.name = '_.' + node.name;
})

expr // ((-_.A1 + _.SUM(_.A5, _.A6)) + "%")

It's pretty easy to turn this into a function:

var fn = new Function('_', 'return ' + expr);

var total = fn({
  A1: 2,
  A5: 5,
  A6: 6,
  SUM: function(a, b) { return a + b }
})

total // 9% 

Installation

npm install jsepgen

Contact

• [email protected]
• @lapwinglabs
• lapwinglabs.com

License

MIT