Skip to content

Instantly share code, notes, and snippets.

@mikilian

mikilian/reflect-metadata.ts

Last active May 16, 2020 21:27
Show Gist options
  • Save mikilian/d7b589ee50dc24672d1cba212f0ab542 to your computer and use it in GitHub Desktop.
Save mikilian/d7b589ee50dc24672d1cba212f0ab542 to your computer and use it in GitHub Desktop.
Download ZIP
reflect-metadata.ts 4.1.2 for deno
Raw
reflect-metadata.ts
/*! *****************************************************************************
Copyright (C) Microsoft. All rights reserved.
Licensed under the Apache License, Version 2.0 (the "License"); you may not use
this file except in compliance with the License. You may obtain a copy of the
License at http://www.apache.org/licenses/LICENSE-2.0
THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,
MERCHANTABLITY OR NON-INFRINGEMENT.
See the Apache Version 2.0 License for specific language governing permissions
and limitations under the License.
***************************************************************************** */
export namespace Reflect {
// Metadata Proposal
// https://rbuckton.github.io/reflect-metadata/
type HashMap<V> = Record<string, V>;
interface BufferLike {
[offset: number]: number;
length: number;
}
type IteratorResult<T> = { value: T, done: false } | { value: never, done: true };
interface Iterator<T> {
next(value?: any): IteratorResult<T>;
throw?(value: any): IteratorResult<T>;
return?(value?: T): IteratorResult<T>;
}
interface Iterable<T> {
"@@iterator"(): Iterator<T>;
}
interface IterableIterator<T> extends Iterator<T> {
"@@iterator"(): IterableIterator<T>;
}
interface Map<K, V> extends Iterable<[K, V]> {
size: number;
has(key: K): boolean;
get(key: K): V;
set(key: K, value?: V): this;
delete(key: K): boolean;
clear(): void;
keys(): IterableIterator<K>;
values(): IterableIterator<V>;
entries(): IterableIterator<[K, V]>;
}
interface MapConstructor {
new (): Map<any, any>;
new <K, V>(): Map<K, V>;
prototype: Map<any, any>;
}
interface Set<T> extends Iterable<T> {
size: number;
has(value: T): boolean;
add(value: T): this;
delete(value: T): boolean;
clear(): void;
keys(): IterableIterator<T>;
values(): IterableIterator<T>;
entries(): IterableIterator<[T, T]>;
}
interface SetConstructor {
new (): Set<any>;
new <T>(): Set<T>;
prototype: Set<any>;
}
interface WeakMap<K, V> {
clear(): void;
delete(key: K): boolean;
get(key: K): V;
has(key: K): boolean;
set(key: K, value?: V): WeakMap<K, V>;
}
interface WeakMapConstructor {
new (): WeakMap<any, any>;
new <K, V>(): WeakMap<K, V>;
prototype: WeakMap<any, any>;
}
type MemberDecorator = <T>(target: Object, propertyKey: string | symbol, descriptor?: TypedPropertyDescriptor<T>) => TypedPropertyDescriptor<T> | void;
declare const Symbol: { iterator: symbol, toPrimitive: symbol };
declare const Set: SetConstructor;
declare const WeakMap: WeakMapConstructor;
declare const Map: MapConstructor;
declare const global: any;
declare const crypto: Crypto;
declare const msCrypto: Crypto;
declare const process: any;
/**
* Applies a set of decorators to a target object.
* @param decorators An array of decorators.
* @param target The target object.
* @returns The result of applying the provided decorators.
* @remarks Decorators are applied in reverse order of their positions in the array.
* @example
*
* class Example { }
*
* // constructor
* Example = Reflect.decorate(decoratorsArray, Example);
*
*/
export declare function decorate(decorators: ClassDecorator[], target: Function): Function;
/**
* Applies a set of decorators to a property of a target object.
* @param decorators An array of decorators.
* @param target The target object.
* @param propertyKey The property key to decorate.
* @param attributes A property descriptor.
* @remarks Decorators are applied in reverse order.
* @example
*
* class Example {
* // property declarations are not part of ES6, though they are valid in TypeScript:
* // static staticProperty;
* // property;
*
* static staticMethod() { }
* method() { }
* }
*
* // property (on constructor)
* Reflect.decorate(decoratorsArray, Example, "staticProperty");
*
* // property (on prototype)
* Reflect.decorate(decoratorsArray, Example.prototype, "property");
*
* // method (on constructor)
* Object.defineProperty(Example, "staticMethod",
* Reflect.decorate(decoratorsArray, Example, "staticMethod",
* Object.getOwnPropertyDescriptor(Example, "staticMethod")));
*
* // method (on prototype)
* Object.defineProperty(Example.prototype, "method",
* Reflect.decorate(decoratorsArray, Example.prototype, "method",
* Object.getOwnPropertyDescriptor(Example.prototype, "method")));
*
*/
export declare function decorate(decorators: (PropertyDecorator | MethodDecorator)[], target: any, propertyKey: string | symbol, attributes?: PropertyDescriptor | null): PropertyDescriptor | undefined;
/**
* Applies a set of decorators to a property of a target object.
* @param decorators An array of decorators.
* @param target The target object.
* @param propertyKey The property key to decorate.
* @param attributes A property descriptor.
* @remarks Decorators are applied in reverse order.
* @example
*
* class Example {
* // property declarations are not part of ES6, though they are valid in TypeScript:
* // static staticProperty;
* // property;
*
* static staticMethod() { }
* method() { }
* }
*
* // property (on constructor)
* Reflect.decorate(decoratorsArray, Example, "staticProperty");
*
* // property (on prototype)
* Reflect.decorate(decoratorsArray, Example.prototype, "property");
*
* // method (on constructor)
* Object.defineProperty(Example, "staticMethod",
* Reflect.decorate(decoratorsArray, Example, "staticMethod",
* Object.getOwnPropertyDescriptor(Example, "staticMethod")));
*
* // method (on prototype)
* Object.defineProperty(Example.prototype, "method",
* Reflect.decorate(decoratorsArray, Example.prototype, "method",
* Object.getOwnPropertyDescriptor(Example.prototype, "method")));
*
*/
export declare function decorate(decorators: (PropertyDecorator | MethodDecorator)[], target: any, propertyKey: string | symbol, attributes: PropertyDescriptor): PropertyDescriptor;
/**
* A default metadata decorator factory that can be used on a class, class member, or parameter.
* @param metadataKey The key for the metadata entry.
* @param metadataValue The value for the metadata entry.
* @returns A decorator function.
* @remarks
* If `metadataKey` is already defined for the target and target key, the
* metadataValue for that key will be overwritten.
* @example
*
* // constructor
* @Reflect.metadata(key, value)
* class Example {
* }
*
* // property (on constructor, TypeScript only)
* class Example {
* @Reflect.metadata(key, value)
* static staticProperty;
* }
*
* // property (on prototype, TypeScript only)
* class Example {
* @Reflect.metadata(key, value)
* property;
* }
*
* // method (on constructor)
* class Example {
* @Reflect.metadata(key, value)
* static staticMethod() { }
* }
*
* // method (on prototype)
* class Example {
* @Reflect.metadata(key, value)
* method() { }
* }
*
*/
export declare function metadata(metadataKey: any, metadataValue: any): { (target: Function): void; (target: any, propertyKey: string | symbol): void; };
/**
* Define a unique metadata entry on the target.
* @param metadataKey A key used to store and retrieve metadata.
* @param metadataValue A value that contains attached metadata.
* @param target The target object on which to define metadata.
* @example
*
* class Example {
* }
*
* // constructor
* Reflect.defineMetadata("custom:annotation", options, Example);
*
* // decorator factory as metadata-producing annotation.
* function MyAnnotation(options): ClassDecorator {
* return target => Reflect.defineMetadata("custom:annotation", options, target);
* }
*
*/
export declare function defineMetadata(metadataKey: any, metadataValue: any, target: any): void;
/**
* Define a unique metadata entry on the target.
* @param metadataKey A key used to store and retrieve metadata.
* @param metadataValue A value that contains attached metadata.
* @param target The target object on which to define metadata.
* @param propertyKey The property key for the target.
* @example
*
* class Example {
* // property declarations are not part of ES6, though they are valid in TypeScript:
* // static staticProperty;
* // property;
*
* static staticMethod(p) { }
* method(p) { }
* }
*
* // property (on constructor)
* Reflect.defineMetadata("custom:annotation", Number, Example, "staticProperty");
*
* // property (on prototype)
* Reflect.defineMetadata("custom:annotation", Number, Example.prototype, "property");
*
* // method (on constructor)
* Reflect.defineMetadata("custom:annotation", Number, Example, "staticMethod");
*
* // method (on prototype)
* Reflect.defineMetadata("custom:annotation", Number, Example.prototype, "method");
*
* // decorator factory as metadata-producing annotation.
* function MyAnnotation(options): PropertyDecorator {
* return (target, key) => Reflect.defineMetadata("custom:annotation", options, target, key);
* }
*
*/
export declare function defineMetadata(metadataKey: any, metadataValue: any, target: any, propertyKey: string | symbol): void;
/**
* Gets a value indicating whether the target object or its prototype chain has the provided metadata key defined.
* @param metadataKey A key used to store and retrieve metadata.
* @param target The target object on which the metadata is defined.
* @returns `true` if the metadata key was defined on the target object or its prototype chain; otherwise, `false`.
* @example
*
* class Example {
* }
*
* // constructor
* result = Reflect.hasMetadata("custom:annotation", Example);
*
*/
export declare function hasMetadata(metadataKey: any, target: any): boolean;
/**
* Gets a value indicating whether the target object or its prototype chain has the provided metadata key defined.
* @param metadataKey A key used to store and retrieve metadata.
* @param target The target object on which the metadata is defined.
* @param propertyKey The property key for the target.
* @returns `true` if the metadata key was defined on the target object or its prototype chain; otherwise, `false`.
* @example
*
* class Example {
* // property declarations are not part of ES6, though they are valid in TypeScript:
* // static staticProperty;
* // property;
*
* static staticMethod(p) { }
* method(p) { }
* }
*
* // property (on constructor)
* result = Reflect.hasMetadata("custom:annotation", Example, "staticProperty");
*
* // property (on prototype)
* result = Reflect.hasMetadata("custom:annotation", Example.prototype, "property");
*
* // method (on constructor)
* result = Reflect.hasMetadata("custom:annotation", Example, "staticMethod");
*
* // method (on prototype)
* result = Reflect.hasMetadata("custom:annotation", Example.prototype, "method");
*
*/
export declare function hasMetadata(metadataKey: any, target: any, propertyKey: string | symbol): boolean;
/**
* Gets a value indicating whether the target object has the provided metadata key defined.
* @param metadataKey A key used to store and retrieve metadata.
* @param target The target object on which the metadata is defined.
* @returns `true` if the metadata key was defined on the target object; otherwise, `false`.
* @example
*
* class Example {
* }
*
* // constructor
* result = Reflect.hasOwnMetadata("custom:annotation", Example);
*
*/
export declare function hasOwnMetadata(metadataKey: any, target: any): boolean;
/**
* Gets a value indicating whether the target object has the provided metadata key defined.
* @param metadataKey A key used to store and retrieve metadata.
* @param target The target object on which the metadata is defined.
* @param propertyKey The property key for the target.
* @returns `true` if the metadata key was defined on the target object; otherwise, `false`.
* @example
*
* class Example {
* // property declarations are not part of ES6, though they are valid in TypeScript:
* // static staticProperty;
* // property;
*
* static staticMethod(p) { }
* method(p) { }
* }
*
* // property (on constructor)
* result = Reflect.hasOwnMetadata("custom:annotation", Example, "staticProperty");
*
* // property (on prototype)
* result = Reflect.hasOwnMetadata("custom:annotation", Example.prototype, "property");
*
* // method (on constructor)
* result = Reflect.hasOwnMetadata("custom:annotation", Example, "staticMethod");
*
* // method (on prototype)
* result = Reflect.hasOwnMetadata("custom:annotation", Example.prototype, "method");
*
*/
export declare function hasOwnMetadata(metadataKey: any, target: any, propertyKey: string | symbol): boolean;
/**
* Gets the metadata value for the provided metadata key on the target object or its prototype chain.
* @param metadataKey A key used to store and retrieve metadata.
* @param target The target object on which the metadata is defined.
* @returns The metadata value for the metadata key if found; otherwise, `undefined`.
* @example
*
* class Example {
* }
*
* // constructor
* result = Reflect.getMetadata("custom:annotation", Example);
*
*/
export declare function getMetadata(metadataKey: any, target: any): any;
/**
* Gets the metadata value for the provided metadata key on the target object or its prototype chain.
* @param metadataKey A key used to store and retrieve metadata.
* @param target The target object on which the metadata is defined.
* @param propertyKey The property key for the target.
* @returns The metadata value for the metadata key if found; otherwise, `undefined`.
* @example
*
* class Example {
* // property declarations are not part of ES6, though they are valid in TypeScript:
* // static staticProperty;
* // property;
*
* static staticMethod(p) { }
* method(p) { }
* }
*
* // property (on constructor)
* result = Reflect.getMetadata("custom:annotation", Example, "staticProperty");
*
* // property (on prototype)
* result = Reflect.getMetadata("custom:annotation", Example.prototype, "property");
*
* // method (on constructor)
* result = Reflect.getMetadata("custom:annotation", Example, "staticMethod");
*
* // method (on prototype)
* result = Reflect.getMetadata("custom:annotation", Example.prototype, "method");
*
*/
export declare function getMetadata(metadataKey: any, target: any, propertyKey: string | symbol): any;
/**
* Gets the metadata value for the provided metadata key on the target object.
* @param metadataKey A key used to store and retrieve metadata.
* @param target The target object on which the metadata is defined.
* @returns The metadata value for the metadata key if found; otherwise, `undefined`.
* @example
*
* class Example {
* }
*
* // constructor
* result = Reflect.getOwnMetadata("custom:annotation", Example);
*
*/
export declare function getOwnMetadata(metadataKey: any, target: any): any;
/**
* Gets the metadata value for the provided metadata key on the target object.
* @param metadataKey A key used to store and retrieve metadata.
* @param target The target object on which the metadata is defined.
* @param propertyKey The property key for the target.
* @returns The metadata value for the metadata key if found; otherwise, `undefined`.
* @example
*
* class Example {
* // property declarations are not part of ES6, though they are valid in TypeScript:
* // static staticProperty;
* // property;
*
* static staticMethod(p) { }
* method(p) { }
* }
*
* // property (on constructor)
* result = Reflect.getOwnMetadata("custom:annotation", Example, "staticProperty");
*
* // property (on prototype)
* result = Reflect.getOwnMetadata("custom:annotation", Example.prototype, "property");
*
* // method (on constructor)
* result = Reflect.getOwnMetadata("custom:annotation", Example, "staticMethod");
*
* // method (on prototype)
* result = Reflect.getOwnMetadata("custom:annotation", Example.prototype, "method");
*
*/
export declare function getOwnMetadata(metadataKey: any, target: any, propertyKey: string | symbol): any;
/**
* Gets the metadata keys defined on the target object or its prototype chain.
* @param target The target object on which the metadata is defined.
* @returns An array of unique metadata keys.
* @example
*
* class Example {
* }
*
* // constructor
* result = Reflect.getMetadataKeys(Example);
*
*/
export declare function getMetadataKeys(target: any): any[];
/**
* Gets the metadata keys defined on the target object or its prototype chain.
* @param target The target object on which the metadata is defined.
* @param propertyKey The property key for the target.
* @returns An array of unique metadata keys.
* @example
*
* class Example {
* // property declarations are not part of ES6, though they are valid in TypeScript:
* // static staticProperty;
* // property;
*
* static staticMethod(p) { }
* method(p) { }
* }
*
* // property (on constructor)
* result = Reflect.getMetadataKeys(Example, "staticProperty");
*
* // property (on prototype)
* result = Reflect.getMetadataKeys(Example.prototype, "property");
*
* // method (on constructor)
* result = Reflect.getMetadataKeys(Example, "staticMethod");
*
* // method (on prototype)
* result = Reflect.getMetadataKeys(Example.prototype, "method");
*
*/
export declare function getMetadataKeys(target: any, propertyKey: string | symbol): any[];
/**
* Gets the unique metadata keys defined on the target object.
* @param target The target object on which the metadata is defined.
* @returns An array of unique metadata keys.
* @example
*
* class Example {
* }
*
* // constructor
* result = Reflect.getOwnMetadataKeys(Example);
*
*/
export declare function getOwnMetadataKeys(target: any): any[];
/**
* Gets the unique metadata keys defined on the target object.
* @param target The target object on which the metadata is defined.
* @param propertyKey The property key for the target.
* @returns An array of unique metadata keys.
* @example
*
* class Example {
* // property declarations are not part of ES6, though they are valid in TypeScript:
* // static staticProperty;
* // property;
*
* static staticMethod(p) { }
* method(p) { }
* }
*
* // property (on constructor)
* result = Reflect.getOwnMetadataKeys(Example, "staticProperty");
*
* // property (on prototype)
* result = Reflect.getOwnMetadataKeys(Example.prototype, "property");
*
* // method (on constructor)
* result = Reflect.getOwnMetadataKeys(Example, "staticMethod");
*
* // method (on prototype)
* result = Reflect.getOwnMetadataKeys(Example.prototype, "method");
*
*/
export declare function getOwnMetadataKeys(target: any, propertyKey: string | symbol): any[];
/**
* Deletes the metadata entry from the target object with the provided key.
* @param metadataKey A key used to store and retrieve metadata.
* @param target The target object on which the metadata is defined.
* @returns `true` if the metadata entry was found and deleted; otherwise, false.
* @example
*
* class Example {
* }
*
* // constructor
* result = Reflect.deleteMetadata("custom:annotation", Example);
*
*/
export declare function deleteMetadata(metadataKey: any, target: any): boolean;
/**
* Deletes the metadata entry from the target object with the provided key.
* @param metadataKey A key used to store and retrieve metadata.
* @param target The target object on which the metadata is defined.
* @param propertyKey The property key for the target.
* @returns `true` if the metadata entry was found and deleted; otherwise, false.
* @example
*
* class Example {
* // property declarations are not part of ES6, though they are valid in TypeScript:
* // static staticProperty;
* // property;
*
* static staticMethod(p) { }
* method(p) { }
* }
*
* // property (on constructor)
* result = Reflect.deleteMetadata("custom:annotation", Example, "staticProperty");
*
* // property (on prototype)
* result = Reflect.deleteMetadata("custom:annotation", Example.prototype, "property");
*
* // method (on constructor)
* result = Reflect.deleteMetadata("custom:annotation", Example, "staticMethod");
*
* // method (on prototype)
* result = Reflect.deleteMetadata("custom:annotation", Example.prototype, "method");
*
*/
export declare function deleteMetadata(metadataKey: any, target: any, propertyKey: string | symbol): boolean;
declare var self: { [key: string]: any };
(function (this: any, factory: (exporter: <K extends keyof typeof Reflect>(key: K, value: typeof Reflect[K]) => void) => void) {
const root = typeof global === "object" ? global :
typeof self === "object" ? self :
typeof this === "object" ? this :
Function("return this;")();
let exporter = makeExporter(Reflect);
if (typeof root.Reflect === "undefined") {
root.Reflect = Reflect;
}
else {
exporter = makeExporter(root.Reflect, exporter);
}
factory(exporter);
function makeExporter(target: typeof Reflect, previous?: <K extends keyof typeof Reflect>(key: K, value: typeof Reflect[K]) => void) {
return <K extends keyof typeof Reflect>(key: K, value: typeof Reflect[K]) => {
if (typeof target[key] !== "function") {
Object.defineProperty(target, key, { configurable: true, writable: true, value });
}
if (previous) previous(key, value);
};
}
})
(function (exporter) {
const hasOwn = Object.prototype.hasOwnProperty;
// feature test for Symbol support
const supportsSymbol = typeof Symbol === "function";
const toPrimitiveSymbol = supportsSymbol && typeof Symbol.toPrimitive !== "undefined" ? Symbol.toPrimitive : "@@toPrimitive";
const iteratorSymbol = supportsSymbol && typeof Symbol.iterator !== "undefined" ? Symbol.iterator : "@@iterator";
const supportsCreate = typeof Object.create === "function"; // feature test for Object.create support
const supportsProto = { __proto__: [] } instanceof Array; // feature test for __proto__ support
const downLevel = !supportsCreate && !supportsProto;
const HashMap = {
// create an object in dictionary mode (a.k.a. "slow" mode in v8)
create: supportsCreate
? <V>() => MakeDictionary(Object.create(null) as HashMap<V>)
: supportsProto
? <V>() => MakeDictionary({ __proto__: null as any } as HashMap<V>)
: <V>() => MakeDictionary({} as HashMap<V>),
has: downLevel
? <V>(map: HashMap<V>, key: string | number | symbol) => hasOwn.call(map, key)
: <V>(map: HashMap<V>, key: string | number | symbol) => key in map,
get: downLevel
? <V>(map: HashMap<V>, key: string | number | symbol): V | undefined => hasOwn.call(map, key) ? map[key as string | number] : undefined
: <V>(map: HashMap<V>, key: string | number | symbol): V | undefined => map[key as string | number],
};
// Load global or shim versions of Map, Set, and WeakMap
const functionPrototype = Object.getPrototypeOf(Function);
const usePolyfill = typeof process === "object" && process.env && process.env["REFLECT_METADATA_USE_MAP_POLYFILL"] === "true";
const _Map: typeof Map = !usePolyfill && typeof Map === "function" && typeof Map.prototype.entries === "function" ? Map : CreateMapPolyfill();
const _Set: typeof Set = !usePolyfill && typeof Set === "function" && typeof Set.prototype.entries === "function" ? Set : CreateSetPolyfill();
const _WeakMap: typeof WeakMap = !usePolyfill && typeof WeakMap === "function" ? WeakMap : CreateWeakMapPolyfill();
// [[Metadata]] internal slot
// https://rbuckton.github.io/reflect-metadata/#ordinary-object-internal-methods-and-internal-slots
const Metadata = new _WeakMap<any, Map<string | symbol | undefined, Map<any, any>>>();
// function decorate(decorators: ClassDecorator[], target: Function): Function;
// function decorate(decorators: (PropertyDecorator | MethodDecorator)[], target: any, propertyKey: string | symbol, attributes?: PropertyDescriptor | null): PropertyDescriptor | undefined;
// function decorate(decorators: (PropertyDecorator | MethodDecorator)[], target: any, propertyKey: string | symbol, attributes: PropertyDescriptor): PropertyDescriptor;
/**
* Applies a set of decorators to a property of a target object.
* @param decorators An array of decorators.
* @param target The target object.
* @param propertyKey (Optional) The property key to decorate.
* @param attributes (Optional) The property descriptor for the target key.
* @remarks Decorators are applied in reverse order.
* @example
*
* class Example {
* // property declarations are not part of ES6, though they are valid in TypeScript:
* // static staticProperty;
* // property;
*
* constructor(p) { }
* static staticMethod(p) { }
* method(p) { }
* }
*
* // constructor
* Example = Reflect.decorate(decoratorsArray, Example);
*
* // property (on constructor)
* Reflect.decorate(decoratorsArray, Example, "staticProperty");
*
* // property (on prototype)
* Reflect.decorate(decoratorsArray, Example.prototype, "property");
*
* // method (on constructor)
* Object.defineProperty(Example, "staticMethod",
* Reflect.decorate(decoratorsArray, Example, "staticMethod",
* Object.getOwnPropertyDescriptor(Example, "staticMethod")));
*
* // method (on prototype)
* Object.defineProperty(Example.prototype, "method",
* Reflect.decorate(decoratorsArray, Example.prototype, "method",
* Object.getOwnPropertyDescriptor(Example.prototype, "method")));
*
*/
function decorate(decorators: (ClassDecorator | MemberDecorator)[], target: any, propertyKey?: string | symbol, attributes?: PropertyDescriptor | null): PropertyDescriptor | Function | undefined {
if (!IsUndefined(propertyKey)) {
if (!IsArray(decorators)) throw new TypeError();
if (!IsObject(target)) throw new TypeError();
if (!IsObject(attributes) && !IsUndefined(attributes) && !IsNull(attributes)) throw new TypeError();
if (IsNull(attributes)) attributes = undefined;
propertyKey = ToPropertyKey(propertyKey);
return DecorateProperty(<MemberDecorator[]>decorators, target, propertyKey, attributes);
}
else {
if (!IsArray(decorators)) throw new TypeError();
if (!IsConstructor(target)) throw new TypeError();
return DecorateConstructor(<ClassDecorator[]>decorators, <Function>target);
}
}
exporter("decorate", <any>decorate);
// 4.1.2 Reflect.metadata(metadataKey, metadataValue)
// https://rbuckton.github.io/reflect-metadata/#reflect.metadata
/**
* A default metadata decorator factory that can be used on a class, class member, or parameter.
* @param metadataKey The key for the metadata entry.
* @param metadataValue The value for the metadata entry.
* @returns A decorator function.
* @remarks
* If `metadataKey` is already defined for the target and target key, the
* metadataValue for that key will be overwritten.
* @example
*
* // constructor
* @Reflect.metadata(key, value)
* class Example {
* }
*
* // property (on constructor, TypeScript only)
* class Example {
* @Reflect.metadata(key, value)
* static staticProperty;
* }
*
* // property (on prototype, TypeScript only)
* class Example {
* @Reflect.metadata(key, value)
* property;
* }
*
* // method (on constructor)
* class Example {
* @Reflect.metadata(key, value)
* static staticMethod() { }
* }
*
* // method (on prototype)
* class Example {
* @Reflect.metadata(key, value)
* method() { }
* }
*
*/
function metadata(metadataKey: any, metadataValue: any) {
function decorator(target: Function): void;
function decorator(target: any, propertyKey: string | symbol): void;
function decorator(target: any, propertyKey?: string | symbol): void {
if (!IsObject(target)) throw new TypeError();
if (!IsUndefined(propertyKey) && !IsPropertyKey(propertyKey)) throw new TypeError();
OrdinaryDefineOwnMetadata(metadataKey, metadataValue, target, propertyKey);
}
return decorator;
}
exporter("metadata", metadata);
// 4.1.3 Reflect.defineMetadata(metadataKey, metadataValue, target [, propertyKey])
// https://rbuckton.github.io/reflect-metadata/#reflect.definemetadata
function defineMetadata(metadataKey: any, metadataValue: any, target: any): void;
function defineMetadata(metadataKey: any, metadataValue: any, target: any, propertyKey: string | symbol): void;
/**
* Define a unique metadata entry on the target.
* @param metadataKey A key used to store and retrieve metadata.
* @param metadataValue A value that contains attached metadata.
* @param target The target object on which to define metadata.
* @param propertyKey (Optional) The property key for the target.
* @example
*
* class Example {
* // property declarations are not part of ES6, though they are valid in TypeScript:
* // static staticProperty;
* // property;
*
* constructor(p) { }
* static staticMethod(p) { }
* method(p) { }
* }
*
* // constructor
* Reflect.defineMetadata("custom:annotation", options, Example);
*
* // property (on constructor)
* Reflect.defineMetadata("custom:annotation", options, Example, "staticProperty");
*
* // property (on prototype)
* Reflect.defineMetadata("custom:annotation", options, Example.prototype, "property");
*
* // method (on constructor)
* Reflect.defineMetadata("custom:annotation", options, Example, "staticMethod");
*
* // method (on prototype)
* Reflect.defineMetadata("custom:annotation", options, Example.prototype, "method");
*
* // decorator factory as metadata-producing annotation.
* function MyAnnotation(options): Decorator {
* return (target, key?) => Reflect.defineMetadata("custom:annotation", options, target, key);
* }
*
*/
function defineMetadata(metadataKey: any, metadataValue: any, target: any, propertyKey?: string | symbol): void {
if (!IsObject(target)) throw new TypeError();
if (!IsUndefined(propertyKey)) propertyKey = ToPropertyKey(propertyKey);
return OrdinaryDefineOwnMetadata(metadataKey, metadataValue, target, propertyKey);
}
exporter("defineMetadata", defineMetadata);
// 4.1.4 Reflect.hasMetadata(metadataKey, target [, propertyKey])
// https://rbuckton.github.io/reflect-metadata/#reflect.hasmetadata
function hasMetadata(metadataKey: any, target: any): boolean;
function hasMetadata(metadataKey: any, target: any, propertyKey: string | symbol): boolean;
/**
* Gets a value indicating whether the target object or its prototype chain has the provided metadata key defined.
* @param metadataKey A key used to store and retrieve metadata.
* @param target The target object on which the metadata is defined.
* @param propertyKey (Optional) The property key for the target.
* @returns `true` if the metadata key was defined on the target object or its prototype chain; otherwise, `false`.
* @example
*
* class Example {
* // property declarations are not part of ES6, though they are valid in TypeScript:
* // static staticProperty;
* // property;
*
* constructor(p) { }
* static staticMethod(p) { }
* method(p) { }
* }
*
* // constructor
* result = Reflect.hasMetadata("custom:annotation", Example);
*
* // property (on constructor)
* result = Reflect.hasMetadata("custom:annotation", Example, "staticProperty");
*
* // property (on prototype)
* result = Reflect.hasMetadata("custom:annotation", Example.prototype, "property");
*
* // method (on constructor)
* result = Reflect.hasMetadata("custom:annotation", Example, "staticMethod");
*
* // method (on prototype)
* result = Reflect.hasMetadata("custom:annotation", Example.prototype, "method");
*
*/
function hasMetadata(metadataKey: any, target: any, propertyKey?: string | symbol): boolean {
if (!IsObject(target)) throw new TypeError();
if (!IsUndefined(propertyKey)) propertyKey = ToPropertyKey(propertyKey);
return OrdinaryHasMetadata(metadataKey, target, propertyKey);
}
exporter("hasMetadata", hasMetadata);
// 4.1.5 Reflect.hasOwnMetadata(metadataKey, target [, propertyKey])
// https://rbuckton.github.io/reflect-metadata/#reflect-hasownmetadata
function hasOwnMetadata(metadataKey: any, target: any): boolean;
function hasOwnMetadata(metadataKey: any, target: any, propertyKey: string | symbol): boolean;
/**
* Gets a value indicating whether the target object has the provided metadata key defined.
* @param metadataKey A key used to store and retrieve metadata.
* @param target The target object on which the metadata is defined.
* @param propertyKey (Optional) The property key for the target.
* @returns `true` if the metadata key was defined on the target object; otherwise, `false`.
* @example
*
* class Example {
* // property declarations are not part of ES6, though they are valid in TypeScript:
* // static staticProperty;
* // property;
*
* constructor(p) { }
* static staticMethod(p) { }
* method(p) { }
* }
*
* // constructor
* result = Reflect.hasOwnMetadata("custom:annotation", Example);
*
* // property (on constructor)
* result = Reflect.hasOwnMetadata("custom:annotation", Example, "staticProperty");
*
* // property (on prototype)
* result = Reflect.hasOwnMetadata("custom:annotation", Example.prototype, "property");
*
* // method (on constructor)
* result = Reflect.hasOwnMetadata("custom:annotation", Example, "staticMethod");
*
* // method (on prototype)
* result = Reflect.hasOwnMetadata("custom:annotation", Example.prototype, "method");
*
*/
function hasOwnMetadata(metadataKey: any, target: any, propertyKey?: string | symbol): boolean {
if (!IsObject(target)) throw new TypeError();
if (!IsUndefined(propertyKey)) propertyKey = ToPropertyKey(propertyKey);
return OrdinaryHasOwnMetadata(metadataKey, target, propertyKey);
}
exporter("hasOwnMetadata", hasOwnMetadata);
// 4.1.6 Reflect.getMetadata(metadataKey, target [, propertyKey])
// https://rbuckton.github.io/reflect-metadata/#reflect-getmetadata
function getMetadata(metadataKey: any, target: any): any;
function getMetadata(metadataKey: any, target: any, propertyKey: string | symbol): any;
/**
* Gets the metadata value for the provided metadata key on the target object or its prototype chain.
* @param metadataKey A key used to store and retrieve metadata.
* @param target The target object on which the metadata is defined.
* @param propertyKey (Optional) The property key for the target.
* @returns The metadata value for the metadata key if found; otherwise, `undefined`.
* @example
*
* class Example {
* // property declarations are not part of ES6, though they are valid in TypeScript:
* // static staticProperty;
* // property;
*
* constructor(p) { }
* static staticMethod(p) { }
* method(p) { }
* }
*
* // constructor
* result = Reflect.getMetadata("custom:annotation", Example);
*
* // property (on constructor)
* result = Reflect.getMetadata("custom:annotation", Example, "staticProperty");
*
* // property (on prototype)
* result = Reflect.getMetadata("custom:annotation", Example.prototype, "property");
*
* // method (on constructor)
* result = Reflect.getMetadata("custom:annotation", Example, "staticMethod");
*
* // method (on prototype)
* result = Reflect.getMetadata("custom:annotation", Example.prototype, "method");
*
*/
function getMetadata(metadataKey: any, target: any, propertyKey?: string | symbol): any {
if (!IsObject(target)) throw new TypeError();
if (!IsUndefined(propertyKey)) propertyKey = ToPropertyKey(propertyKey);
return OrdinaryGetMetadata(metadataKey, target, propertyKey);
}
exporter("getMetadata", getMetadata);
// 4.1.7 Reflect.getOwnMetadata(metadataKey, target [, propertyKey])
// https://rbuckton.github.io/reflect-metadata/#reflect-getownmetadata
function getOwnMetadata(metadataKey: any, target: any): any;
function getOwnMetadata(metadataKey: any, target: any, propertyKey: string | symbol): any;
/**
* Gets the metadata value for the provided metadata key on the target object.
* @param metadataKey A key used to store and retrieve metadata.
* @param target The target object on which the metadata is defined.
* @param propertyKey (Optional) The property key for the target.
* @returns The metadata value for the metadata key if found; otherwise, `undefined`.
* @example
*
* class Example {
* // property declarations are not part of ES6, though they are valid in TypeScript:
* // static staticProperty;
* // property;
*
* constructor(p) { }
* static staticMethod(p) { }
* method(p) { }
* }
*
* // constructor
* result = Reflect.getOwnMetadata("custom:annotation", Example);
*
* // property (on constructor)
* result = Reflect.getOwnMetadata("custom:annotation", Example, "staticProperty");
*
* // property (on prototype)
* result = Reflect.getOwnMetadata("custom:annotation", Example.prototype, "property");
*
* // method (on constructor)
* result = Reflect.getOwnMetadata("custom:annotation", Example, "staticMethod");
*
* // method (on prototype)
* result = Reflect.getOwnMetadata("custom:annotation", Example.prototype, "method");
*
*/
function getOwnMetadata(metadataKey: any, target: any, propertyKey?: string | symbol): any {
if (!IsObject(target)) throw new TypeError();
if (!IsUndefined(propertyKey)) propertyKey = ToPropertyKey(propertyKey);
return OrdinaryGetOwnMetadata(metadataKey, target, propertyKey);
}
exporter("getOwnMetadata", getOwnMetadata);
// 4.1.8 Reflect.getMetadataKeys(target [, propertyKey])
// https://rbuckton.github.io/reflect-metadata/#reflect-getmetadatakeys
function getMetadataKeys(target: any): any[];
function getMetadataKeys(target: any, propertyKey: string | symbol): any[];
/**
* Gets the metadata keys defined on the target object or its prototype chain.
* @param target The target object on which the metadata is defined.
* @param propertyKey (Optional) The property key for the target.
* @returns An array of unique metadata keys.
* @example
*
* class Example {
* // property declarations are not part of ES6, though they are valid in TypeScript:
* // static staticProperty;
* // property;
*
* constructor(p) { }
* static staticMethod(p) { }
* method(p) { }
* }
*
* // constructor
* result = Reflect.getMetadataKeys(Example);
*
* // property (on constructor)
* result = Reflect.getMetadataKeys(Example, "staticProperty");
*
* // property (on prototype)
* result = Reflect.getMetadataKeys(Example.prototype, "property");
*
* // method (on constructor)
* result = Reflect.getMetadataKeys(Example, "staticMethod");
*
* // method (on prototype)
* result = Reflect.getMetadataKeys(Example.prototype, "method");
*
*/
function getMetadataKeys(target: any, propertyKey?: string | symbol): any[] {
if (!IsObject(target)) throw new TypeError();
if (!IsUndefined(propertyKey)) propertyKey = ToPropertyKey(propertyKey);
return OrdinaryMetadataKeys(target, propertyKey);
}
exporter("getMetadataKeys", getMetadataKeys);
// 4.1.9 Reflect.getOwnMetadataKeys(target [, propertyKey])
// https://rbuckton.github.io/reflect-metadata/#reflect-getownmetadata
function getOwnMetadataKeys(target: any): any[];
function getOwnMetadataKeys(target: any, propertyKey: string | symbol): any[];
/**
* Gets the unique metadata keys defined on the target object.
* @param target The target object on which the metadata is defined.
* @param propertyKey (Optional) The property key for the target.
* @returns An array of unique metadata keys.
* @example
*
* class Example {
* // property declarations are not part of ES6, though they are valid in TypeScript:
* // static staticProperty;
* // property;
*
* constructor(p) { }
* static staticMethod(p) { }
* method(p) { }
* }
*
* // constructor
* result = Reflect.getOwnMetadataKeys(Example);
*
* // property (on constructor)
* result = Reflect.getOwnMetadataKeys(Example, "staticProperty");
*
* // property (on prototype)
* result = Reflect.getOwnMetadataKeys(Example.prototype, "property");
*
* // method (on constructor)
* result = Reflect.getOwnMetadataKeys(Example, "staticMethod");
*
* // method (on prototype)
* result = Reflect.getOwnMetadataKeys(Example.prototype, "method");
*
*/
function getOwnMetadataKeys(target: any, propertyKey?: string | symbol): any[] {
if (!IsObject(target)) throw new TypeError();
if (!IsUndefined(propertyKey)) propertyKey = ToPropertyKey(propertyKey);
return OrdinaryOwnMetadataKeys(target, propertyKey);
}
exporter("getOwnMetadataKeys", getOwnMetadataKeys);
// 4.1.10 Reflect.deleteMetadata(metadataKey, target [, propertyKey])
// https://rbuckton.github.io/reflect-metadata/#reflect-deletemetadata
function deleteMetadata(metadataKey: any, target: any): boolean;
function deleteMetadata(metadataKey: any, target: any, propertyKey: string | symbol): boolean;
/**
* Deletes the metadata entry from the target object with the provided key.
* @param metadataKey A key used to store and retrieve metadata.
* @param target The target object on which the metadata is defined.
* @param propertyKey (Optional) The property key for the target.
* @returns `true` if the metadata entry was found and deleted; otherwise, false.
* @example
*
* class Example {
* // property declarations are not part of ES6, though they are valid in TypeScript:
* // static staticProperty;
* // property;
*
* constructor(p) { }
* static staticMethod(p) { }
* method(p) { }
* }
*
* // constructor
* result = Reflect.deleteMetadata("custom:annotation", Example);
*
* // property (on constructor)
* result = Reflect.deleteMetadata("custom:annotation", Example, "staticProperty");
*
* // property (on prototype)
* result = Reflect.deleteMetadata("custom:annotation", Example.prototype, "property");
*
* // method (on constructor)
* result = Reflect.deleteMetadata("custom:annotation", Example, "staticMethod");
*
* // method (on prototype)
* result = Reflect.deleteMetadata("custom:annotation", Example.prototype, "method");
*
*/
function deleteMetadata(metadataKey: any, target: any, propertyKey?: string | symbol): boolean {
if (!IsObject(target)) throw new TypeError();
if (!IsUndefined(propertyKey)) propertyKey = ToPropertyKey(propertyKey);
const metadataMap = GetOrCreateMetadataMap(target, propertyKey, /*Create*/ false);
if (IsUndefined(metadataMap)) return false;
if (!metadataMap.delete(metadataKey)) return false;
if (metadataMap.size > 0) return true;
const targetMetadata = Metadata.get(target);
targetMetadata.delete(propertyKey);
if (targetMetadata.size > 0) return true;
Metadata.delete(target);
return true;
}
exporter("deleteMetadata", deleteMetadata);
function DecorateConstructor(decorators: ClassDecorator[], target: Function): Function {
for (let i = decorators.length - 1; i >= 0; --i) {
const decorator = decorators[i];
const decorated = decorator(target);
if (!IsUndefined(decorated) && !IsNull(decorated)) {
if (!IsConstructor(decorated)) throw new TypeError();
target = <Function>decorated;
}
}
return target;
}
function DecorateProperty(decorators: MemberDecorator[], target: any, propertyKey: string | symbol, descriptor: PropertyDescriptor | undefined): PropertyDescriptor | undefined {
for (let i = decorators.length - 1; i >= 0; --i) {
const decorator = decorators[i];
const decorated = decorator(target, propertyKey, descriptor);
if (!IsUndefined(decorated) && !IsNull(decorated)) {
if (!IsObject(decorated)) throw new TypeError();
descriptor = <PropertyDescriptor>decorated;
}
}
return descriptor;
}
// 2.1.1 GetOrCreateMetadataMap(O, P, Create)
// https://rbuckton.github.io/reflect-metadata/#getorcreatemetadatamap
function GetOrCreateMetadataMap(O: any, P: string | symbol | undefined, Create: true): Map<any, any>;
function GetOrCreateMetadataMap(O: any, P: string | symbol | undefined, Create: false): Map<any, any> | undefined;
function GetOrCreateMetadataMap(O: any, P: string | symbol | undefined, Create: boolean): Map<any, any> | undefined {
let targetMetadata = Metadata.get(O);
if (IsUndefined(targetMetadata)) {
if (!Create) return undefined;
targetMetadata = new _Map<string | symbol | undefined, Map<any, any>>();
Metadata.set(O, targetMetadata);
}
let metadataMap = targetMetadata.get(P);
if (IsUndefined(metadataMap)) {
if (!Create) return undefined;
metadataMap = new _Map<any, any>();
targetMetadata.set(P, metadataMap);
}
return metadataMap;
}
// 3.1.1.1 OrdinaryHasMetadata(MetadataKey, O, P)
// https://rbuckton.github.io/reflect-metadata/#ordinaryhasmetadata
function OrdinaryHasMetadata(MetadataKey: any, O: any, P: string | symbol | undefined): boolean {
const hasOwn = OrdinaryHasOwnMetadata(MetadataKey, O, P);
if (hasOwn) return true;
const parent = OrdinaryGetPrototypeOf(O);
if (!IsNull(parent)) return OrdinaryHasMetadata(MetadataKey, parent, P);
return false;
}
// 3.1.2.1 OrdinaryHasOwnMetadata(MetadataKey, O, P)
// https://rbuckton.github.io/reflect-metadata/#ordinaryhasownmetadata
function OrdinaryHasOwnMetadata(MetadataKey: any, O: any, P: string | symbol | undefined): boolean {
const metadataMap = GetOrCreateMetadataMap(O, P, /*Create*/ false);
if (IsUndefined(metadataMap)) return false;
return ToBoolean(metadataMap.has(MetadataKey));
}
// 3.1.3.1 OrdinaryGetMetadata(MetadataKey, O, P)
// https://rbuckton.github.io/reflect-metadata/#ordinarygetmetadata
function OrdinaryGetMetadata(MetadataKey: any, O: any, P: string | symbol | undefined): any {
const hasOwn = OrdinaryHasOwnMetadata(MetadataKey, O, P);
if (hasOwn) return OrdinaryGetOwnMetadata(MetadataKey, O, P);
const parent = OrdinaryGetPrototypeOf(O);
if (!IsNull(parent)) return OrdinaryGetMetadata(MetadataKey, parent, P);
return undefined;
}
// 3.1.4.1 OrdinaryGetOwnMetadata(MetadataKey, O, P)
// https://rbuckton.github.io/reflect-metadata/#ordinarygetownmetadata
function OrdinaryGetOwnMetadata(MetadataKey: any, O: any, P: string | symbol | undefined): any {
const metadataMap = GetOrCreateMetadataMap(O, P, /*Create*/ false);
if (IsUndefined(metadataMap)) return undefined;
return metadataMap.get(MetadataKey);
}
// 3.1.5.1 OrdinaryDefineOwnMetadata(MetadataKey, MetadataValue, O, P)
// https://rbuckton.github.io/reflect-metadata/#ordinarydefineownmetadata
function OrdinaryDefineOwnMetadata(MetadataKey: any, MetadataValue: any, O: any, P: string | symbol | undefined): void {
const metadataMap = GetOrCreateMetadataMap(O, P, /*Create*/ true);
metadataMap.set(MetadataKey, MetadataValue);
}
// 3.1.6.1 OrdinaryMetadataKeys(O, P)
// https://rbuckton.github.io/reflect-metadata/#ordinarymetadatakeys
function OrdinaryMetadataKeys(O: any, P: string | symbol | undefined): any[] {
const ownKeys = OrdinaryOwnMetadataKeys(O, P);
const parent = OrdinaryGetPrototypeOf(O);
if (parent === null) return ownKeys;
const parentKeys = OrdinaryMetadataKeys(parent, P);
if (parentKeys.length <= 0) return ownKeys;
if (ownKeys.length <= 0) return parentKeys;
const set = new _Set<any>();
const keys: any[] = [];
for (const key of ownKeys) {
const hasKey = set.has(key);
if (!hasKey) {
set.add(key);
keys.push(key);
}
}
for (const key of parentKeys) {
const hasKey = set.has(key);
if (!hasKey) {
set.add(key);
keys.push(key);
}
}
return keys;
}
// 3.1.7.1 OrdinaryOwnMetadataKeys(O, P)
// https://rbuckton.github.io/reflect-metadata/#ordinaryownmetadatakeys
function OrdinaryOwnMetadataKeys(O: any, P: string | symbol | undefined): any[] {
const keys: any[] = [];
const metadataMap = GetOrCreateMetadataMap(O, P, /*Create*/ false);
if (IsUndefined(metadataMap)) return keys;
const keysObj = metadataMap.keys();
const iterator = GetIterator(keysObj);
let k = 0;
while (true) {
const next = IteratorStep(iterator);
if (!next) {
keys.length = k;
return keys;
}
const nextValue = IteratorValue(next);
try {
keys[k] = nextValue;
}
catch (e) {
try {
IteratorClose(iterator);
}
finally {
throw e;
}
}
k++;
}
}
// 6 ECMAScript Data Typ0es and Values
// https://tc39.github.io/ecma262/#sec-ecmascript-data-types-and-values
function Type(x: any): Tag {
if (x === null) return Tag.Null;
switch (typeof x) {
case "undefined": return Tag.Undefined;
case "boolean": return Tag.Boolean;
case "string": return Tag.String;
case "symbol": return Tag.Symbol;
case "number": return Tag.Number;
case "object": return x === null ? Tag.Null : Tag.Object;
default: return Tag.Object;
}
}
// 6.1 ECMAScript Language Types
// https://tc39.github.io/ecma262/#sec-ecmascript-language-types
const enum Tag {
Undefined,
Null,
Boolean,
String,
Symbol,
Number,
Object
}
// 6.1.1 The Undefined Type
// https://tc39.github.io/ecma262/#sec-ecmascript-language-types-undefined-type
function IsUndefined(x: any): x is undefined {
return x === undefined;
}
// 6.1.2 The Null Type
// https://tc39.github.io/ecma262/#sec-ecmascript-language-types-null-type
function IsNull(x: any): x is null {
return x === null;
}
// 6.1.5 The Symbol Type
// https://tc39.github.io/ecma262/#sec-ecmascript-language-types-symbol-type
function IsSymbol(x: any): x is symbol {
return typeof x === "symbol";
}
// 6.1.7 The Object Type
// https://tc39.github.io/ecma262/#sec-object-type
function IsObject<T>(x: T | undefined | null | boolean | string | symbol | number): x is T {
return typeof x === "object" ? x !== null : typeof x === "function";
}
// 7.1 Type Conversion
// https://tc39.github.io/ecma262/#sec-type-conversion
// 7.1.1 ToPrimitive(input [, PreferredType])
// https://tc39.github.io/ecma262/#sec-toprimitive
function ToPrimitive(input: any, PreferredType?: Tag): undefined | null | boolean | string | symbol | number {
switch (Type(input)) {
case Tag.Undefined: return input;
case Tag.Null: return input;
case Tag.Boolean: return input;
case Tag.String: return input;
case Tag.Symbol: return input;
case Tag.Number: return input;
}
const hint: "string" | "number" | "default" = PreferredType === Tag.String ? "string" : PreferredType === Tag.Number ? "number" : "default";
const exoticToPrim = GetMethod(input, toPrimitiveSymbol);
if (exoticToPrim !== undefined) {
const result = exoticToPrim.call(input, hint);
if (IsObject(result)) throw new TypeError();
return result;
}
return OrdinaryToPrimitive(input, hint === "default" ? "number" : hint);
}
// 7.1.1.1 OrdinaryToPrimitive(O, hint)
// https://tc39.github.io/ecma262/#sec-ordinarytoprimitive
function OrdinaryToPrimitive(O: any, hint: "string" | "number"): undefined | null | boolean | string | symbol | number {
if (hint === "string") {
const toString = O.toString;
if (IsCallable(toString)) {
const result = toString.call(O);
if (!IsObject(result)) return result;
}
const valueOf = O.valueOf;
if (IsCallable(valueOf)) {
const result = valueOf.call(O);
if (!IsObject(result)) return result;
}
}
else {
const valueOf = O.valueOf;
if (IsCallable(valueOf)) {
const result = valueOf.call(O);
if (!IsObject(result)) return result;
}
const toString = O.toString;
if (IsCallable(toString)) {
const result = toString.call(O);
if (!IsObject(result)) return result;
}
}
throw new TypeError();
}
// 7.1.2 ToBoolean(argument)
// https://tc39.github.io/ecma262/2016/#sec-toboolean
function ToBoolean(argument: any): boolean {
return !!argument;
}
// 7.1.12 ToString(argument)
// https://tc39.github.io/ecma262/#sec-tostring
function ToString(argument: any): string {
return "" + argument;
}
// 7.1.14 ToPropertyKey(argument)
// https://tc39.github.io/ecma262/#sec-topropertykey
function ToPropertyKey(argument: any): string | symbol {
const key = ToPrimitive(argument, Tag.String);
if (IsSymbol(key)) return key;
return ToString(key);
}
// 7.2 Testing and Comparison Operations
// https://tc39.github.io/ecma262/#sec-testing-and-comparison-operations
// 7.2.2 IsArray(argument)
// https://tc39.github.io/ecma262/#sec-isarray
function IsArray(argument: any): argument is any[] {
return Array.isArray
? Array.isArray(argument)
: argument instanceof Object
? argument instanceof Array
: Object.prototype.toString.call(argument) === "[object Array]";
}
// 7.2.3 IsCallable(argument)
// https://tc39.github.io/ecma262/#sec-iscallable
function IsCallable(argument: any): argument is Function {
// NOTE: This is an approximation as we cannot check for [[Call]] internal method.
return typeof argument === "function";
}
// 7.2.4 IsConstructor(argument)
// https://tc39.github.io/ecma262/#sec-isconstructor
function IsConstructor(argument: any): argument is Function {
// NOTE: This is an approximation as we cannot check for [[Construct]] internal method.
return typeof argument === "function";
}
// 7.2.7 IsPropertyKey(argument)
// https://tc39.github.io/ecma262/#sec-ispropertykey
function IsPropertyKey(argument: any): argument is string | symbol {
switch (Type(argument)) {
case Tag.String: return true;
case Tag.Symbol: return true;
default: return false;
}
}
// 7.3 Operations on Objects
// https://tc39.github.io/ecma262/#sec-operations-on-objects
// 7.3.9 GetMethod(V, P)
// https://tc39.github.io/ecma262/#sec-getmethod
function GetMethod(V: any, P: any): Function | undefined {
const func = V[P];
if (func === undefined || func === null) return undefined;
if (!IsCallable(func)) throw new TypeError();
return func;
}
// 7.4 Operations on Iterator Objects
// https://tc39.github.io/ecma262/#sec-operations-on-iterator-objects
function GetIterator<T>(obj: Iterable<T>): Iterator<T> {
const method = GetMethod(obj, iteratorSymbol);
if (!IsCallable(method)) throw new TypeError(); // from Call
const iterator = method.call(obj);
if (!IsObject(iterator)) throw new TypeError();
return iterator;
}
// 7.4.4 IteratorValue(iterResult)
// https://tc39.github.io/ecma262/2016/#sec-iteratorvalue
function IteratorValue<T>(iterResult: IteratorResult<T>): T {
return iterResult.value;
}
// 7.4.5 IteratorStep(iterator)
// https://tc39.github.io/ecma262/#sec-iteratorstep
function IteratorStep<T>(iterator: Iterator<T>): IteratorResult<T> | false {
const result = iterator.next();
return result.done ? false : result;
}
// 7.4.6 IteratorClose(iterator, completion)
// https://tc39.github.io/ecma262/#sec-iteratorclose
function IteratorClose<T>(iterator: Iterator<T>) {
const f = iterator["return"];
if (f) f.call(iterator);
}
// 9.1 Ordinary Object Internal Methods and Internal Slots
// https://tc39.github.io/ecma262/#sec-ordinary-object-internal-methods-and-internal-slots
// 9.1.1.1 OrdinaryGetPrototypeOf(O)
// https://tc39.github.io/ecma262/#sec-ordinarygetprototypeof
function OrdinaryGetPrototypeOf(O: any): any {
const proto = Object.getPrototypeOf(O);
if (typeof O !== "function" || O === functionPrototype) return proto;
// TypeScript doesn't set __proto__ in ES5, as it's non-standard.
// Try to determine the superclass constructor. Compatible implementations
// must either set __proto__ on a subclass constructor to the superclass constructor,
// or ensure each class has a valid `constructor` property on its prototype that
// points back to the constructor.
// If this is not the same as Function.[[Prototype]], then this is definately inherited.
// This is the case when in ES6 or when using __proto__ in a compatible browser.
if (proto !== functionPrototype) return proto;
// If the super prototype is Object.prototype, null, or undefined, then we cannot determine the heritage.
const prototype = O.prototype;
const prototypeProto = prototype && Object.getPrototypeOf(prototype);
if (prototypeProto == null || prototypeProto === Object.prototype) return proto;
// If the constructor was not a function, then we cannot determine the heritage.
const constructor = prototypeProto.constructor;
if (typeof constructor !== "function") return proto;
// If we have some kind of self-reference, then we cannot determine the heritage.
if (constructor === O) return proto;
// we have a pretty good guess at the heritage.
return constructor;
}
// naive Map shim
function CreateMapPolyfill(): MapConstructor {
const cacheSentinel = {};
const arraySentinel: any[] = [];
class MapIterator<K, V, R extends (K | V | [K, V])> implements IterableIterator<R> {
private _keys: K[];
private _values: V[];
private _index = 0;
private _selector: (key: K, value: V) => R;
constructor(keys: K[], values: V[], selector: (key: K, value: V) => R) {
this._keys = keys;
this._values = values;
this._selector = selector;
}
"@@iterator"() { return this; }
[iteratorSymbol]() { return this; }
next(): IteratorResult<R> {
const index = this._index;
if (index >= 0 && index < this._keys.length) {
const result = this._selector(this._keys[index], this._values[index]);
if (index + 1 >= this._keys.length) {
this._index = -1;
this._keys = arraySentinel;
this._values = arraySentinel;
}
else {
this._index++;
}
return { value: result, done: false };
}
return { value: <never>undefined, done: true };
}
throw(error: any): IteratorResult<R> {
if (this._index >= 0) {
this._index = -1;
this._keys = arraySentinel;
this._values = arraySentinel;
}
throw error;
}
return(value?: R): IteratorResult<R> {
if (this._index >= 0) {
this._index = -1;
this._keys = arraySentinel;
this._values = arraySentinel;
}
return { value: <never>value, done: true };
}
}
return class Map<K, V> {
private _keys: K[] = [];
private _values: (V | undefined)[] = [];
private _cacheKey = cacheSentinel;
private _cacheIndex = -2;
get size() { return this._keys.length; }
has(key: K): boolean { return this._find(key, /*insert*/ false) >= 0; }
get(key: K): V | undefined {
const index = this._find(key, /*insert*/ false);
return index >= 0 ? this._values[index] : undefined;
}
set(key: K, value: V): this {
const index = this._find(key, /*insert*/ true);
this._values[index] = value;
return this;
}
delete(key: K): boolean {
const index = this._find(key, /*insert*/ false);
if (index >= 0) {
const size = this._keys.length;
for (let i = index + 1; i < size; i++) {
this._keys[i - 1] = this._keys[i];
this._values[i - 1] = this._values[i];
}
this._keys.length--;
this._values.length--;
if (key === this._cacheKey) {
this._cacheKey = cacheSentinel;
this._cacheIndex = -2;
}
return true;
}
return false;
}
clear(): void {
this._keys.length = 0;
this._values.length = 0;
this._cacheKey = cacheSentinel;
this._cacheIndex = -2;
}
keys() { return new MapIterator(this._keys, this._values, getKey); }
values() { return new MapIterator(this._keys, this._values, getValue); }
entries() { return new MapIterator(this._keys, this._values, getEntry); }
"@@iterator"() { return this.entries(); }
[iteratorSymbol]() { return this.entries(); }
private _find(key: K, insert?: boolean): number {
if (this._cacheKey !== key) {
this._cacheIndex = this._keys.indexOf(this._cacheKey = key);
}
if (this._cacheIndex < 0 && insert) {
this._cacheIndex = this._keys.length;
this._keys.push(key);
this._values.push(undefined);
}
return this._cacheIndex;
}
};
function getKey<K, V>(key: K, _: V) {
return key;
}
function getValue<K, V>(_: K, value: V) {
return value;
}
function getEntry<K, V>(key: K, value: V) {
return [key, value] as [K, V];
}
}
// naive Set shim
function CreateSetPolyfill(): SetConstructor {
return class Set<T> {
private _map = new _Map<any, any>();
get size() { return this._map.size; }
has(value: T): boolean { return this._map.has(value); }
add(value: T): Set<T> { return this._map.set(value, value), this; }
delete(value: T): boolean { return this._map.delete(value); }
clear(): void { this._map.clear(); }
keys() { return this._map.keys(); }
values() { return this._map.values(); }
entries() { return this._map.entries(); }
"@@iterator"() { return this.keys(); }
[iteratorSymbol]() { return this.keys(); }
};
}
// naive WeakMap shim
function CreateWeakMapPolyfill(): WeakMapConstructor {
const UUID_SIZE = 16;
const keys = HashMap.create<boolean>();
const rootKey = CreateUniqueKey();
return class WeakMap<K, V> {
private _key = CreateUniqueKey();
has(target: K): boolean {
const table = GetOrCreateWeakMapTable<K>(target, /*create*/ false);
return table !== undefined ? HashMap.has(table, this._key) : false;
}
get(target: K): V {
const table = GetOrCreateWeakMapTable<K>(target, /*create*/ false);
return table !== undefined ? HashMap.get(table, this._key) : undefined;
}
set(target: K, value: V): WeakMap<K, V> {
const table = GetOrCreateWeakMapTable<K>(target, /*create*/ true);
table[this._key] = value;
return this;
}
delete(target: K): boolean {
const table = GetOrCreateWeakMapTable<K>(target, /*create*/ false);
return table !== undefined ? delete table[this._key] : false;
}
clear(): void {
// NOTE: not a real clear, just makes the previous data unreachable
this._key = CreateUniqueKey();
}
};
function CreateUniqueKey(): string {
let key: string;
do key = "@@WeakMap@@" + CreateUUID();
while (HashMap.has(keys, key));
keys[key] = true;
return key;
}
function GetOrCreateWeakMapTable<K>(target: K, create: true): HashMap<any>;
function GetOrCreateWeakMapTable<K>(target: K, create: false): HashMap<any> | undefined;
function GetOrCreateWeakMapTable<K>(target: K, create: boolean): HashMap<any> | undefined {
if (!hasOwn.call(target, rootKey)) {
if (!create) return undefined;
Object.defineProperty(target, rootKey, { value: HashMap.create<any>() });
}
return (<any>target)[rootKey];
}
function FillRandomBytes(buffer: BufferLike, size: number): BufferLike {
for (let i = 0; i < size; ++i) buffer[i] = Math.random() * 0xff | 0;
return buffer;
}
function GenRandomBytes(size: number): BufferLike {
if (typeof Uint8Array === "function") {
if (typeof crypto !== "undefined") return crypto.getRandomValues(new Uint8Array(size)) as Uint8Array;
if (typeof msCrypto !== "undefined") return msCrypto.getRandomValues(new Uint8Array(size)) as Uint8Array;
return FillRandomBytes(new Uint8Array(size), size);
}
return FillRandomBytes(new Array(size), size);
}
function CreateUUID() {
const data = GenRandomBytes(UUID_SIZE);
// mark as random - RFC 4122 § 4.4
data[6] = data[6] & 0x4f | 0x40;
data[8] = data[8] & 0xbf | 0x80;
let result = "";
for (let offset = 0; offset < UUID_SIZE; ++offset) {
const byte = data[offset];
if (offset === 4 || offset === 6 || offset === 8) result += "-";
if (byte < 16) result += "0";
result += byte.toString(16).toLowerCase();
}
return result;
}
}
// uses a heuristic used by v8 and chakra to force an object into dictionary mode.
function MakeDictionary<T>(obj: T): T {
(<any>obj).__ = undefined;
delete (<any>obj).__;
return obj;
}
});
}
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment