Change all File APIs to make the mode and encoding arguments named

sdk/lib/io/file.dart

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 part of dart.io;
 
 /**
  * FileMode describes the modes in which a file can be opened.
  */
 class FileMode {
@@ skipping 112 matching lines @@
    *
    * [FileMode.READ]: open the file for reading.
    *
    * [FileMode.WRITE]: open the file for both reading and writing and
    * truncate the file to length zero. If the file does not exist the
    * file is created.
    *
    * [FileMode.APPEND]: same as [FileMode.WRITE] except that the file is
    * not truncated.
    */
-  Future<RandomAccessFile> open([FileMode mode = FileMode.READ]);
+  Future<RandomAccessFile> open({FileMode mode: FileMode.READ});
 
   /**
    * Synchronously open the file for random access operations. The
    * result is a [RandomAccessFile] on which random access operations
    * can be performed. Opened [RandomAccessFile]s must be closed using
    * the [RandomAccessFile.close] method.
    *
    * See [open] for information on the [mode] argument.
    */
-  RandomAccessFile openSync([FileMode mode = FileMode.READ]);
+  RandomAccessFile openSync({FileMode mode: FileMode.READ});
 
   /**
    * Get the canonical full path corresponding to the file path.
    * Returns a [:Future<String>:] that completes with the path.
    */
   Future<String> fullPath();
 
   /**
    * Synchronously get the canonical full path corresponding to the file path.
    */
@@ skipping 41 matching lines @@
    */
   List<int> readAsBytesSync();
 
   /**
    * Read the entire file contents as a string using the given
    * [Encoding].
    *
    * Returns a [:Future<String>:] that completes with the string once
    * the file contents has been read.
    */
-  Future<String> readAsString([Encoding encoding = Encoding.UTF_8]);
+  Future<String> readAsString({Encoding encoding: Encoding.UTF_8});
 
   /**
    * Synchronously read the entire file contents as a string using the
    * given [Encoding].
    */
-  String readAsStringSync([Encoding encoding = Encoding.UTF_8]);
+  String readAsStringSync({Encoding encoding: Encoding.UTF_8});
 
   /**
    * Read the entire file contents as lines of text using the given
    * [Encoding].
    *
    * Returns a [:Future<List<String>>:] that completes with the lines
    * once the file contents has been read.
    */
-  Future<List<String>> readAsLines([Encoding encoding = Encoding.UTF_8]);
+  Future<List<String>> readAsLines({Encoding encoding: Encoding.UTF_8});
 
   /**
    * Synchronously read the entire file contents as lines of text
    * using the given [Encoding].
    */
-  List<String> readAsLinesSync([Encoding encoding = Encoding.UTF_8]);
+  List<String> readAsLinesSync({Encoding encoding: Encoding.UTF_8});
 
   /**
    * Write a list of bytes to a file.
    *
    * Opens the file, writes the list of bytes to it, and closes the file.
    * Returns a [:Future<File>:] that completes with this [File] object once
    * the entire operation has completed.
    *
    * By default [writeAsBytes] creates the file for writing and truncates the
    * file if it already exists. In order to append the bytes to an existing
    * file, pass [FileMode.APPEND] as the optional mode parameter.
    */
-  Future<File> writeAsBytes(List<int> bytes, [FileMode mode = FileMode.WRITE]);
+  Future<File> writeAsBytes(List<int> bytes, {FileMode mode: FileMode.WRITE});
 
   /**
    * Synchronously write a list of bytes to a file.
    *
    * Opens the file, writes the list of bytes to it and closes the file.
    *
    * By default [writeAsBytesSync] creates the file for writing and truncates
    * the file if it already exists. In order to append the bytes to an existing
    * file, pass [FileMode.APPEND] as the optional mode parameter.
    */
-  void writeAsBytesSync(List<int> bytes, [FileMode mode = FileMode.WRITE]);
+  void writeAsBytesSync(List<int> bytes, {FileMode mode: FileMode.WRITE});
 
   /**
    * Write a string to a file.
    *
    * Opens the file, writes the string in the given encoding, and closes the
    * file. Returns a [:Future<File>:] that completes with this [File] object
    * once the entire operation has completed.
    *
    * By default [writeAsString] creates the file for writing and truncates the
    * file if it already exists. In order to append the bytes to an existing
@@ skipping 108 matching lines @@
    * of bytes successfully written.
    */
   int writeListSync(List<int> buffer, int offset, int bytes);
 
   /**
    * Writes a string to the file using the given [Encoding]. Returns a
    * [:Future<RandomAccessFile>:] that completes with this
    * RandomAccessFile when the write completes.
    */
   Future<RandomAccessFile> writeString(String string,
-                                       [Encoding encoding = Encoding.UTF_8]);
+                                       {Encoding encoding: Encoding.UTF_8});
 
   /**
    * Synchronously writes a single string to the file using the given
    * [Encoding]. Returns the number of characters successfully
    * written.
    */
   int writeStringSync(String string,
-                      [Encoding encoding = Encoding.UTF_8]);
+                      {Encoding encoding: Encoding.UTF_8});
 
   /**
    * Gets the current byte position in the file. Returns a
    * [:Future<int>:] that completes with the position.
    */
   Future<int> position();
 
   /**
    * Synchronously gets the current byte position in the file.
    */
@@ skipping 70 matching lines @@
         sb.write(" ($osError)");
       }
     } else if (osError != null) {
       sb.write(": osError");
     }
     return sb.toString();
   }
   final String message;
   final OSError osError;
 }