Function parseCompIter

lib/filbert.js:2304–2324

(expr, first)

  // 'expr' is the body to be used after unrolling the ifs and fors

  function parseCompIter(expr, first) {
    if (first && tokType !== _for) unexpected();
    if (eat(_bracketR)) return expr;
    var node = startNode();
    if (eat(_for)) {
      var init = parseExpression(false, true);
      var tupleArgs = getTupleArgs(init);
      if (!tupleArgs) checkLVal(init);
      expect(_in);
      var right = parseExpression();
      var body = parseCompIter(expr, false);
      var block = nc.createNodeSpan(body, body, "BlockStatement", { body: [body] });
      finishNode(node, "BlockStatement");
      return nc.createFor(node, init, tupleArgs, right, block);
    } else if (eat(_if)) {
      if (tokType === _parenL) node.test = parseParenExpression();
      else node.test = parseExpression();
      node.consequent = parseCompIter(expr, false);
      return finishNode(node, "IfStatement");
    } else unexpected();
  }

  // Parse class