Add support for __esDecorate and related helpers (#193)

microsoft · Jan 20, 2023 · 62c5322 · 62c5322
1 parent 3bdc002
commit 62c5322
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diff --git a/modules/index.js b/modules/index.js
@@ -5,6 +5,10 @@ const {
     __rest,
     __decorate,
     __param,
+    __esDecorate,
+    __runInitializers,
+    __propKey,
+    __setFunctionName,
     __metadata,
     __awaiter,
     __generator,
@@ -32,6 +36,10 @@ export {
     __rest,
     __decorate,
     __param,
+    __esDecorate,
+    __runInitializers,
+    __propKey,
+    __setFunctionName,
     __metadata,
     __awaiter,
     __generator,

diff --git a/tslib.d.ts b/tslib.d.ts
@@ -58,6 +58,38 @@ export declare function __decorate(decorators: Function[], target: any, key?: st
  */
 export declare function __param(paramIndex: number, decorator: Function): Function;
 
+/**
+ * Applies decorators to a class or class member, following the native ECMAScript decorator specification.
+ * @param ctor For non-field class members, the class constructor. Otherwise, `null`.
+ * @param descriptorIn The `PropertyDescriptor` to use when unable to look up the property from `ctor`.
+ * @param decorators The decorators to apply
+ * @param contextIn The `DecoratorContext` to clone for each decorator application.
+ * @param initializers An array of field initializer mutation functions into which new initializers are written.
+ * @param extraInitializers An array of extra initializer functions into which new initializers are written.
+ */
+export declare function __esDecorate(ctor: Function | null, descriptorIn: object | null, decorators: Function[], contextIn: object, initializers: Function[] | null, extraInitializers: Function[]): void;
+
+/**
+ * Runs field initializers or extra initializers generated by `__esDecorate`.
+ * @param thisArg The `this` argument to use.
+ * @param initializers The array of initializers to evaluate.
+ * @param value The initial value to pass to the initializers.
+ */
+export declare function __runInitializers(thisArg: unknown, initializers: Function[], value?: any): any;
+
+/**
+ * Converts a computed property name into a `string` or `symbol` value.
+ */
+export declare function __propKey(x: any): string | symbol;
+
+/**
+ * Assigns the name of a function derived from the left-hand side of an assignment.
+ * @param f The function to rename.
+ * @param name The new name for the function.
+ * @param prefix A prefix (such as `"get"` or `"set"`) to insert before the name.
+ */
+export declare function __setFunctionName(f: Function, name: string | symbol, prefix?: string): Function;
+
 /**
  * Creates a decorator that sets metadata.
  *

diff --git a/tslib.es6.js b/tslib.es6.js
@@ -63,6 +63,51 @@ export function __param(paramIndex, decorator) {
     return function (target, key) { decorator(target, key, paramIndex); }
 }
 
+export function __esDecorate(ctor, descriptorIn, decorators, contextIn, initializers, extraInitializers) {
+    function accept(f) { if (f !== void 0 && typeof f !== "function") throw new TypeError("Function expected"); return f; }
+    var kind = contextIn.kind, key = kind === "getter" ? "get" : kind === "setter" ? "set" : "value";
+    var target = !descriptorIn && ctor ? contextIn["static"] ? ctor : ctor.prototype : null;
+    var descriptor = descriptorIn || (target ? Object.getOwnPropertyDescriptor(target, contextIn.name) : {});
+    var _, done = false;
+    for (var i = decorators.length - 1; i >= 0; i--) {
+        var context = {};
+        for (var p in contextIn) context[p] = p === "access" ? {} : contextIn[p];
+        for (var p in contextIn.access) context.access[p] = contextIn.access[p];
+        context.addInitializer = function (f) { if (done) throw new TypeError("Cannot add initializers after decoration has completed"); extraInitializers.push(accept(f || null)); };
+        var result = (0, decorators[i])(kind === "accessor" ? { get: descriptor.get, set: descriptor.set } : descriptor[key], context);
+        if (kind === "accessor") {
+            if (result === void 0) continue;
+            if (result === null || typeof result !== "object") throw new TypeError("Object expected");
+            if (_ = accept(result.get)) descriptor.get = _;
+            if (_ = accept(result.set)) descriptor.set = _;
+            if (_ = accept(result.init)) initializers.push(_);
+        }
+        else if (_ = accept(result)) {
+            if (kind === "field") initializers.push(_);
+            else descriptor[key] = _;
+        }
+    }
+    if (target) Object.defineProperty(target, contextIn.name, descriptor);
+    done = true;
+};
+
+export function __runInitializers(thisArg, initializers, value) {
+    var useValue = arguments.length > 2;
+    for (var i = 0; i < initializers.length; i++) {
+        value = useValue ? initializers[i].call(thisArg, value) : initializers[i].call(thisArg);
+    }
+    return useValue ? value : void 0;
+};
+
+export function __propKey(x) {
+    return typeof x === "symbol" ? x : "".concat(x);
+};
+
+export function __setFunctionName(f, name, prefix) {
+    if (typeof name === "symbol") name = name.description ? "[".concat(name.description, "]") : "";
+    return Object.defineProperty(f, "name", { configurable: true, value: prefix ? "".concat(prefix, " ", name) : name });
+};
+
 export function __metadata(metadataKey, metadataValue) {
     if (typeof Reflect === "object" && typeof Reflect.metadata === "function") return Reflect.metadata(metadataKey, metadataValue);
 }

diff --git a/tslib.js b/tslib.js
@@ -18,6 +18,10 @@ var __assign;
 var __rest;
 var __decorate;
 var __param;
+var __esDecorate;
+var __runInitializers;
+var __propKey;
+var __setFunctionName;
 var __metadata;
 var __awaiter;
 var __generator;
@@ -105,6 +109,51 @@ var __createBinding;
         return function (target, key) { decorator(target, key, paramIndex); }
     };
 
+    __esDecorate = function (ctor, descriptorIn, decorators, contextIn, initializers, extraInitializers) {
+        function accept(f) { if (f !== void 0 && typeof f !== "function") throw new TypeError("Function expected"); return f; }
+        var kind = contextIn.kind, key = kind === "getter" ? "get" : kind === "setter" ? "set" : "value";
+        var target = !descriptorIn && ctor ? contextIn["static"] ? ctor : ctor.prototype : null;
+        var descriptor = descriptorIn || (target ? Object.getOwnPropertyDescriptor(target, contextIn.name) : {});
+        var _, done = false;
+        for (var i = decorators.length - 1; i >= 0; i--) {
+            var context = {};
+            for (var p in contextIn) context[p] = p === "access" ? {} : contextIn[p];
+            for (var p in contextIn.access) context.access[p] = contextIn.access[p];
+            context.addInitializer = function (f) { if (done) throw new TypeError("Cannot add initializers after decoration has completed"); extraInitializers.push(accept(f || null)); };
+            var result = (0, decorators[i])(kind === "accessor" ? { get: descriptor.get, set: descriptor.set } : descriptor[key], context);
+            if (kind === "accessor") {
+                if (result === void 0) continue;
+                if (result === null || typeof result !== "object") throw new TypeError("Object expected");
+                if (_ = accept(result.get)) descriptor.get = _;
+                if (_ = accept(result.set)) descriptor.set = _;
+                if (_ = accept(result.init)) initializers.push(_);
+            }
+            else if (_ = accept(result)) {
+                if (kind === "field") initializers.push(_);
+                else descriptor[key] = _;
+            }
+        }
+        if (target) Object.defineProperty(target, contextIn.name, descriptor);
+        done = true;
+    };
+
+    __runInitializers = function (thisArg, initializers, value) {
+        var useValue = arguments.length > 2;
+        for (var i = 0; i < initializers.length; i++) {
+            value = useValue ? initializers[i].call(thisArg, value) : initializers[i].call(thisArg);
+        }
+        return useValue ? value : void 0;
+    };
+
+    __propKey = function (x) {
+        return typeof x === "symbol" ? x : "".concat(x);
+    };
+
+    __setFunctionName = function (f, name, prefix) {
+        if (typeof name === "symbol") name = name.description ? "[".concat(name.description, "]") : "";
+        return Object.defineProperty(f, "name", { configurable: true, value: prefix ? "".concat(prefix, " ", name) : name });
+    };
+
     __metadata = function (metadataKey, metadataValue) {
         if (typeof Reflect === "object" && typeof Reflect.metadata === "function") return Reflect.metadata(metadataKey, metadataValue);
     };
@@ -294,6 +343,10 @@ var __createBinding;
     exporter("__rest", __rest);
     exporter("__decorate", __decorate);
     exporter("__param", __param);
+    exporter("__esDecorate", __esDecorate);
+    exporter("__runInitializers", __runInitializers);
+    exporter("__propKey", __propKey);
+    exporter("__setFunctionName", __setFunctionName);
     exporter("__metadata", __metadata);
     exporter("__awaiter", __awaiter);
     exporter("__generator", __generator);