luhn-generator/update/node_modules/babel-plugin-minify-infinity/lib/index.js

A generator of numbers that passes the validation of Luhn algorithm or Luhn formula, also known as the 'modulus 10' or 'mod 10' algorithm

"use strict";

module.exports = function ({
  types: t
}) {
  const INFINITY = t.binaryExpression("/", t.numericLiteral(1), t.numericLiteral(0));
  return {
    name: "minify-infinity",
    visitor: {
      // Infinity -> 1 / 0
      Identifier(path) {
        if (path.node.name !== "Infinity") {
          return;
        } // It's a referenced identifier


        if (path.scope.getBinding("Infinity")) {
          return;
        }

        if (path.parentPath.isObjectProperty({
          key: path.node
        })) {
          return;
        }

        if (path.parentPath.isMemberExpression()) {
          return;
        }

        const bindingIds = path.parentPath.getBindingIdentifierPaths();

        if (bindingIds["Infinity"] === path && // ObjectProperty is common for ObjectExpression and ObjectPattern and only
        // one of them is a Binding, the other is simply a reference
        !path.parentPath.parentPath.isObjectExpression()) {
          return;
        }

        path.replaceWith(INFINITY);
      }

    }
  };
};