pkg/matcher: reapply 36881,36896 working around Issue 19173

pkg/matcher/lib/src/interfaces.dart

 // Copyright (c) 2012, 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.
 
 library matcher.interfaces;
 
 // To decouple the reporting of errors, and allow for extensibility of
 // matchers, we make use of some interfaces.
 
-/**
- * The ErrorFormatter type is used for functions that
- * can be used to build up error reports upon [expect] failures.
- * There is one built-in implementation ([defaultErrorFormatter])
- * which is used by the default failure handler. If the failure handler
- * is replaced it may be desirable to replace the [stringDescription]
- * error formatter with another.
- */
+/// The ErrorFormatter type is used for functions that
+/// can be used to build up error reports upon [expect] failures.
+/// There is one built-in implementation ([defaultErrorFormatter])
+/// which is used by the default failure handler. If the failure handler
+/// is replaced it may be desirable to replace the [stringDescription]
+/// error formatter with another.
 typedef String ErrorFormatter(actual, Matcher matcher, String reason,
     Map matchState, bool verbose);
 
-/**
- * Matchers build up their error messages by appending to
- * Description objects. This interface is implemented by
- * StringDescription. This interface is unlikely to need
- * other implementations, but could be useful to replace in
- * some cases - e.g. language conversion.
- */
+/// Matchers build up their error messages by appending to
+/// Description objects. This interface is implemented by
+/// StringDescription. This interface is unlikely to need
+/// other implementations, but could be useful to replace in
+/// some cases - e.g. language conversion.
 abstract class Description {
   int get length;
 
-  /** Change the value of the description. */
+  /// Change the value of the description.
   Description replace(String text);
 
-  /** This is used to add arbitrary text to the description. */
+  /// This is used to add arbitrary text to the description.
   Description add(String text);
 
-  /** This is used to add a meaningful description of a value. */
+  /// This is used to add a meaningful description of a value.
   Description addDescriptionOf(value);
 
-  /**
-   * This is used to add a description of an [Iterable] [list],
-   * with appropriate [start] and [end] markers and inter-element [separator].
-   */
+  /// This is used to add a description of an [Iterable] [list],
+  /// with appropriate [start] and [end] markers and inter-element [separator].
   Description addAll(String start, String separator, String end, Iterable list);
 }
 
-/**
- * [expect] Matchers must implement/extend the Matcher class.
- * The base Matcher class has a generic implementation of [describeMismatch]
- * so this does not need to be provided unless a more clear description is
- * required. The other two methods ([matches] and [describe])
- * must always be provided as they are highly matcher-specific.
- */
+/// [expect] Matchers must implement/extend the Matcher class.
+/// The base Matcher class has a generic implementation of [describeMismatch]
+/// so this does not need to be provided unless a more clear description is
+/// required. The other two methods ([matches] and [describe])
+/// must always be provided as they are highly matcher-specific.
 abstract class Matcher {
   const Matcher();
 
-  /**
-   * This does the matching of the actual vs expected values.
-   * [item] is the actual value. [matchState] can be supplied
-   * and may be used to add details about the mismatch that are too
-   * costly to determine in [describeMismatch].
-   */
+  /// This does the matching of the actual vs expected values.
+  /// [item] is the actual value. [matchState] can be supplied
+  /// and may be used to add details about the mismatch that are too
+  /// costly to determine in [describeMismatch].
   bool matches(item, Map matchState);
 
-  /** This builds a textual description of the matcher. */
+  /// This builds a textual description of the matcher.
   Description describe(Description description);
 
-  /**
-   * This builds a textual description of a specific mismatch. [item]
-   * is the value that was tested by [matches]; [matchState] is
-   * the [Map] that was passed to and supplemented by [matches]
-   * with additional information about the mismact, and [mismatchDescription]
-   * is the [Description] that is being built to decribe the mismatch.
-   * A few matchers make use of the [verbose] flag to provide detailed
-   * information that is not typically included but can be of help in
-   * diagnosing failures, such as stack traces.
-   */
+  /// This builds a textual description of a specific mismatch. [item]
+  /// is the value that was tested by [matches]; [matchState] is
+  /// the [Map] that was passed to and supplemented by [matches]
+  /// with additional information about the mismact, and [mismatchDescription]
+  /// is the [Description] that is being built to decribe the mismatch.
+  /// A few matchers make use of the [verbose] flag to provide detailed
+  /// information that is not typically included but can be of help in
+  /// diagnosing failures, such as stack traces.
   Description describeMismatch(item, Description mismatchDescription,
       Map matchState, bool verbose) => mismatchDescription;
 }
 
-/**
- * Failed matches are reported using a default IFailureHandler.
- * The default implementation simply throws [TestFailure]s;
- * this can be replaced by some other implementation of
- * IFailureHandler by calling configureExpectHandler.
- */
+/// Failed matches are reported using a default IFailureHandler.
+/// The default implementation simply throws [TestFailure]s;
+/// this can be replaced by some other implementation of
+/// IFailureHandler by calling configureExpectHandler.
 abstract class FailureHandler {
-  /** This handles failures given a textual decription */
+  /// This handles failures given a textual decription
   void fail(String reason);
 
-  /**
-   * This handles failures given the actual [value], the [matcher]
-   * the [reason] (argument from [expect]), some additonal [matchState]
-   * generated by the [matcher], and a verbose flag which controls in
-   * some cases how much [matchState] information is used. It will use
-   * these to create a detailed error message (typically by calling
-   * an [ErrorFormatter]) and then call [fail] with this message.
-   */
+  /// This handles failures given the actual [value], the [matcher]
+  /// the [reason] (argument from [expect]), some additonal [matchState]
+  /// generated by the [matcher], and a verbose flag which controls in
+  /// some cases how much [matchState] information is used. It will use
+  /// these to create a detailed error message (typically by calling
+  /// an [ErrorFormatter]) and then call [fail] with this message.
   void failMatch(actual, Matcher matcher, String reason,
                  Map matchState, bool verbose);
 }
-