logica/lib/postParser.js

a compile-to-javascript predicate logic language

var parser = require('./parser.js');
var traverse = require('traverse');
var _ = require('lodash');

function parse(source) {

  parser.parse(source);
  var parsed = parser.parser.yy

  // for variadic Operations, collapse repeated operands
  traverse(parsed.AST).forEach(function (node) {
    if (!node) return;
    switch (node.type) {
      case 'OPERATION':
        node.tailOperands = _.flatten(node.tailOperands)
        break;
      case 'COMBINATION':
        node.operands = _.flatten(node.operands)
        break;
    }
  })

  return parsed;

}


module.exports = parse