@glimmer/util/dist/commonjs/es2017/lib/platform-utils.js

Common utilities used in Glimmer

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.keys = keys;
exports.unwrap = unwrap;
exports.expect = expect;
exports.unreachable = unreachable;
exports.exhausted = exhausted;
exports.enumerableSymbol = enumerableSymbol;
exports.symbol = exports.tuple = exports.HAS_NATIVE_SYMBOL = exports.HAS_NATIVE_PROXY = void 0;

var _intern = _interopRequireDefault(require("./intern"));

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

const HAS_NATIVE_PROXY = typeof Proxy === 'function';
exports.HAS_NATIVE_PROXY = HAS_NATIVE_PROXY;

const HAS_NATIVE_SYMBOL = function () {
  if (typeof Symbol !== 'function') {
    return false;
  } // eslint-disable-next-line symbol-description


  return typeof Symbol() === 'symbol';
}();

exports.HAS_NATIVE_SYMBOL = HAS_NATIVE_SYMBOL;

function keys(obj) {
  return Object.keys(obj);
}

function unwrap(val) {
  if (val === null || val === undefined) throw new Error(`Expected value to be present`);
  return val;
}

function expect(val, message) {
  if (val === null || val === undefined) throw new Error(message);
  return val;
}

function unreachable(message = 'unreachable') {
  return new Error(message);
}

function exhausted(value) {
  throw new Error(`Exhausted ${value}`);
}

const tuple = (...args) => args;

exports.tuple = tuple;

function enumerableSymbol(key) {
  return (0, _intern.default)(`__${key}${Math.floor(Math.random() * Date.now())}__`);
}

const symbol = HAS_NATIVE_SYMBOL ? Symbol : enumerableSymbol;
exports.symbol = symbol;
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