sebmck/6to5

import * as t from "@babel/types";

export default function (callee, thisNode, args, optional) {
  if (
    args.length === 1 &&
    t.isSpreadElement(args[0]) &&
    t.isIdentifier(args[0].argument, { name: "arguments" })
  ) {
    // eg. super(...arguments);
    return t.callExpression(t.memberExpression(callee, t.identifier("apply")), [
      thisNode,
      args[0].argument,
    ]);
  } else {
    if (optional) {
      return t.optionalCallExpression(
        t.optionalMemberExpression(callee, t.identifier("call"), false, true),
        [thisNode, ...args],
        false,
      );
    }
    return t.callExpression(t.memberExpression(callee, t.identifier("call")), [
      thisNode,
      ...args,
    ]);
  }
}