1 files changed, 0 insertions, 117 deletions
diff --git a/std/util/async.ts b/std/util/async.ts
deleted file mode 100644
index bb50e482d..000000000
--- a/std/util/async.ts
+++ /dev/null
@@ -1,117 +0,0 @@
-// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
-
-// TODO(ry) It'd be better to make Deferred a class that inherits from
-// Promise, rather than an interface. This is possible in ES2016, however
-// typescript produces broken code when targeting ES5 code.
-// See https://github.com/Microsoft/TypeScript/issues/15202
-// At the time of writing, the github issue is closed but the problem remains.
-export interface Deferred<T> extends Promise<T> {
-  resolve: (value?: T | PromiseLike<T>) => void;
-  // eslint-disable-next-line @typescript-eslint/no-explicit-any
-  reject: (reason?: any) => void;
-}
-
-/** Creates a Promise with the `reject` and `resolve` functions
- * placed as methods on the promise object itself. It allows you to do:
- *
- *     const p = deferred<number>();
- *     // ...
- *     p.resolve(42);
- */
-export function deferred<T>(): Deferred<T> {
-  let methods;
-  const promise = new Promise<T>((resolve, reject): void => {
-    methods = { resolve, reject };
-  });
-  return Object.assign(promise, methods) as Deferred<T>;
-}
-
-interface TaggedYieldedValue<T> {
-  iterator: AsyncIterableIterator<T>;
-  value: T;
-}
-
-/** The MuxAsyncIterator class multiplexes multiple async iterators into a
- * single stream. It currently makes a few assumptions:
- * - The iterators do not throw.
- * - The final result (the value returned and not yielded from the iterator)
- *   does not matter; if there is any, it is discarded.
- */
-export class MuxAsyncIterator<T> implements AsyncIterable<T> {
-  private iteratorCount = 0;
-  private yields: Array<TaggedYieldedValue<T>> = [];
-  private signal: Deferred<void> = deferred();
-
-  add(iterator: AsyncIterableIterator<T>): void {
-    ++this.iteratorCount;
-    this.callIteratorNext(iterator);
-  }
-
-  private async callIteratorNext(
-    iterator: AsyncIterableIterator<T>
-  ): Promise<void> {
-    const { value, done } = await iterator.next();
-    if (done) {
-      --this.iteratorCount;
-    } else {
-      this.yields.push({ iterator, value });
-    }
-    this.signal.resolve();
-  }
-
-  async *iterate(): AsyncIterableIterator<T> {
-    while (this.iteratorCount > 0) {
-      // Sleep until any of the wrapped iterators yields.
-      await this.signal;
-
-      // Note that while we're looping over `yields`, new items may be added.
-      for (let i = 0; i < this.yields.length; i++) {
-        const { iterator, value } = this.yields[i];
-        yield value;
-        this.callIteratorNext(iterator);
-      }
-
-      // Clear the `yields` list and reset the `signal` promise.
-      this.yields.length = 0;
-      this.signal = deferred();
-    }
-  }
-
-  [Symbol.asyncIterator](): AsyncIterableIterator<T> {
-    return this.iterate();
-  }
-}
-
-/** Collects all Uint8Arrays from an AsyncIterable and retuns a single
- * Uint8Array with the concatenated contents of all the collected arrays.
- */
-export async function collectUint8Arrays(
-  it: AsyncIterable<Uint8Array>
-): Promise<Uint8Array> {
-  const chunks = [];
-  let length = 0;
-  for await (const chunk of it) {
-    chunks.push(chunk);
-    length += chunk.length;
-  }
-  if (chunks.length === 1) {
-    // No need to copy.
-    return chunks[0];
-  }
-  const collected = new Uint8Array(length);
-  let offset = 0;
-  for (const chunk of chunks) {
-    collected.set(chunk, offset);
-    offset += chunk.length;
-  }
-  return collected;
-}
-
-// Delays the given milliseconds and resolves.
-export function delay(ms: number): Promise<void> {
-  return new Promise((res): number =>
-    setTimeout((): void => {
-      res();
-    }, ms)
-  );
-}