text: /*
   *
   * Copyright 2015, Google Inc.
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions are
   * met:
   *
   *     * Redistributions of source code must retain the above copyright
   * notice, this list of conditions and the following disclaimer.
   *     * Redistributions in binary form must reproduce the above
   * copyright notice, this list of conditions and the following disclaimer
   * in the documentation and/or other materials provided with the
   * distribution.
   *     * Neither the name of Google Inc. nor the names of its
   * contributors may be used to endorse or promote products derived from
   * this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
   * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
   * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   *
   */
  
  #import "GRXWriter.h"
  
  @interface GRXWriter (Immediate)
  
  // Returns a writer that pulls values from the passed NSEnumerator instance and pushes them to
  // its writeable. The NSEnumerator is released when it finishes.
  + (instancetype)writerWithEnumerator:(NSEnumerator *)enumerator;
  
  // Returns a writer that pushes to its writeable the successive values returned by the passed
  // block. When the block first returns nil, it is released.
  + (instancetype)writerWithValueSupplier:(id (^)())block;
  
  // Returns a writer that iterates over the values of the passed container and pushes them to
  // its writeable. The container is released when the iteration is over.
  //
  // Note that the usual speed gain of NSFastEnumeration over NSEnumerator results from not having to
  // call one method per element. Because GRXWriteable instances accept values one by one, that speed
  // gain doesn't happen here.
  + (instancetype)writerWithContainer:(id<NSFastEnumeration>)container;
  
  // Returns a writer that sends the passed value to its writeable and then finishes (releasing the
  // value).
  + (instancetype)writerWithValue:(id)value;
  
  // Returns a writer that, as part of its start method, sends the passed error to the writeable
  // (then releasing the error).
  + (instancetype)writerWithError:(NSError *)error;
  
  // Returns a writer that, as part of its start method, finishes immediately without sending any
  // values to its writeable.
  + (instancetype)emptyWriter;
  
  @end
  