Convert dart_utils.js to input_sdk/lib/_internal/utils.dart (#310)

lib/runtime/dart/_utils.js

+dart_library.library('dart/_utils', null, /* Imports */[
+], /* Lazy imports */[
+], function(exports, dart) {
+  'use strict';
+  let defineProperty = Object.defineProperty;
+  let getOwnPropertyDescriptor = Object.getOwnPropertyDescriptor;
+  let getOwnPropertyNames = Object.getOwnPropertyNames;
+  let getOwnPropertySymbols = Object.getOwnPropertySymbols;
+  let hasOwnProperty = Object.prototype.hasOwnProperty;
+  let StrongModeError = (function() {
+    function StrongModeError(message) {
+      Error.call(this);
+      this.message = message;
+    }
+    ;
+    Object.setPrototypeOf(StrongModeError.prototype, Error.prototype);
+    return StrongModeError;
+  })();
+  function throwStrongModeError(message) {
+    throw new StrongModeError(message);
+  }
+  function throwInternalError(message) {
+    throw Error(message);
+  }
+  function assert_(condition) {
+    if (!condition)
+      throwInternalError("The compiler is broken: failed assert");
+  }
+  function getOwnNamesAndSymbols(obj) {
+    return getOwnPropertyNames(obj).concat(getOwnPropertySymbols(obj));
+  }
+  function safeGetOwnProperty(obj, name) {
+    let desc = getOwnPropertyDescriptor(obj, name);
+    if (desc)
+      return desc.value;
+  }
+  function defineLazyProperty(to, name, desc) {
+    let init = desc.get;
+    let value = null;
+    function lazySetter(x) {
+      init = null;
+      value = x;
+    }
+    function circularInitError() {
+      throwInternalError('circular initialization for field ' + name);
+    }
+    function lazyGetter() {
+      if (init == null)
+        return value;
+      let f = init;
+      init = circularInitError;
+      lazySetter(f());
+      return value;
+    }
+    desc.get = lazyGetter;
+    desc.configurable = true;
+    if (desc.set)
+      desc.set = lazySetter;
+    return defineProperty(to, name, desc);
+  }
+  function defineLazy(to, from) {
+    for (let name of getOwnNamesAndSymbols(from)) {
+      defineLazyProperty(to, name, getOwnPropertyDescriptor(from, name));
+    }
+  }
+  function defineMemoizedGetter(obj, name, getter) {
+    return defineLazyProperty(obj, name, {get: getter});
+  }
+  function copyTheseProperties(to, from, names) {
+    for (let name of names) {
+      defineProperty(to, name, getOwnPropertyDescriptor(from, name));
+    }
+    return to;
+  }
+  function copyProperties(to, from) {
+    return copyTheseProperties(to, from, getOwnNamesAndSymbols(from));
+  }
+  function export_(to, from, show, hide) {
+    if (show == void 0) {
+      show = getOwnNamesAndSymbols(from);
+    }
+    if (hide != void 0) {
+      var hideMap = new Set(hide);
+      show = show.filter(k => !hideMap.has(k));
+    }
+    return copyTheseProperties(to, from, show);
+  }
+  // Exports:
+  exports.defineProperty = defineProperty;
+  exports.getOwnPropertyDescriptor = getOwnPropertyDescriptor;
+  exports.getOwnPropertyNames = getOwnPropertyNames;
+  exports.getOwnPropertySymbols = getOwnPropertySymbols;
+  exports.hasOwnProperty = hasOwnProperty;
+  exports.StrongModeError = StrongModeError;
+  exports.throwStrongModeError = throwStrongModeError;
+  exports.throwInternalError = throwInternalError;
+  exports.assert_ = assert_;
+  exports.getOwnNamesAndSymbols = getOwnNamesAndSymbols;
+  exports.safeGetOwnProperty = safeGetOwnProperty;
+  exports.defineLazyProperty = defineLazyProperty;
+  exports.defineLazy = defineLazy;
+  exports.defineMemoizedGetter = defineMemoizedGetter;
+  exports.copyTheseProperties = copyTheseProperties;
+  exports.copyProperties = copyProperties;
+  exports.export_ = export_;
+});