Tiny module to generate code from the jsep AST
npm install jsepgenTiny module (15 LOC) to generate code from the jsep AST.
Convert all variables and functions to an object with the same key
``js
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:
`js
var fn = new Function('_', 'return ' + expr);
var total = fn({
A1: 2,
A5: 5,
A6: 6,
SUM: function(a, b) { return a + b }
})
total // 9%
`
`
npm install jsepgen
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