Add error codes to server protocol (#25958).

pkg/analysis_server/lib/plugin/protocol/generated_protocol.dart

 // Copyright (c) 2014, 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.
 //
 // This file has been automatically generated.  Please do not edit it manually.
 // To regenerate the file, use the script
 // "pkg/analysis_server/tool/spec/generate_files".
 
 part of analysis_server.plugin.protocol.protocol;
 
@@ skipping 7777 matching lines @@
 
 /**
  * AnalysisError
  *
  * {
  *   "severity": AnalysisErrorSeverity
  *   "type": AnalysisErrorType
  *   "location": Location
  *   "message": String
  *   "correction": optional String
+ *   "code": String
  *   "hasFix": optional bool
  * }
  *
  * Clients may not extend, implement or mix-in this class.
  */
 class AnalysisError implements HasToJson {
   AnalysisErrorSeverity _severity;
 
   AnalysisErrorType _type;
 
   Location _location;
 
   String _message;
 
   String _correction;
 
+  String _code;
+
   bool _hasFix;
 
   /**
    * The severity of the error.
    */
   AnalysisErrorSeverity get severity => _severity;
 
   /**
    * The severity of the error.
    */
@@ skipping 53 matching lines @@
   /**
    * The correction message to be displayed for this error. The correction
    * message should indicate how the user can fix the error. The field is
    * omitted if there is no correction message associated with the error code.
    */
   void set correction(String value) {
     this._correction = value;
   }
 
   /**
+   * The name, as a string, of the error code associated with this error.
+   */
+  String get code => _code;
+
+  /**
+   * The name, as a string, of the error code associated with this error.
+   */
+  void set code(String value) {
+    assert(value != null);
+    this._code = value;
+  }
+
+  /**
    * A hint to indicate to interested clients that this error has an associated
    * fix (or fixes). The absence of this field implies there are not known to
    * be fixes. Note that since the operation to calculate whether fixes apply
    * needs to be performant it is possible that complicated tests will be
    * skipped and a false negative returned. For this reason, this attribute
    * should be treated as a "hint". Despite the possibility of false negatives,
    * no false positives should be returned. If a client sees this flag set they
    * can proceed with the confidence that there are in fact associated fixes.
    */
   bool get hasFix => _hasFix;
 
   /**
    * A hint to indicate to interested clients that this error has an associated
    * fix (or fixes). The absence of this field implies there are not known to
    * be fixes. Note that since the operation to calculate whether fixes apply
    * needs to be performant it is possible that complicated tests will be
    * skipped and a false negative returned. For this reason, this attribute
    * should be treated as a "hint". Despite the possibility of false negatives,
    * no false positives should be returned. If a client sees this flag set they
    * can proceed with the confidence that there are in fact associated fixes.
    */
   void set hasFix(bool value) {
     this._hasFix = value;
   }
 
-  AnalysisError(AnalysisErrorSeverity severity, AnalysisErrorType type, Location location, String message, {String correction, bool hasFix}) {
+  AnalysisError(AnalysisErrorSeverity severity, AnalysisErrorType type, Location location, String message, String code, {String correction, bool hasFix}) {
     this.severity = severity;
     this.type = type;
     this.location = location;
     this.message = message;
     this.correction = correction;
+    this.code = code;
     this.hasFix = hasFix;
   }
 
   factory AnalysisError.fromJson(JsonDecoder jsonDecoder, String jsonPath, Object json) {
     if (json == null) {
       json = {};
     }
     if (json is Map) {
       AnalysisErrorSeverity severity;
       if (json.containsKey("severity")) {
@@ skipping 16 matching lines @@
       String message;
       if (json.containsKey("message")) {
         message = jsonDecoder.decodeString(jsonPath + ".message", json["message"]);
       } else {
         throw jsonDecoder.missingKey(jsonPath, "message");
       }
       String correction;
       if (json.containsKey("correction")) {
         correction = jsonDecoder.decodeString(jsonPath + ".correction", json["correction"]);
       }
+      String code;
+      if (json.containsKey("code")) {
+        code = jsonDecoder.decodeString(jsonPath + ".code", json["code"]);
+      } else {
+        throw jsonDecoder.missingKey(jsonPath, "code");
+      }
       bool hasFix;
       if (json.containsKey("hasFix")) {
         hasFix = jsonDecoder.decodeBool(jsonPath + ".hasFix", json["hasFix"]);
       }
-      return new AnalysisError(severity, type, location, message, correction: correction, hasFix: hasFix);
+      return new AnalysisError(severity, type, location, message, code, correction: correction, hasFix: hasFix);
     } else {
       throw jsonDecoder.mismatch(jsonPath, "AnalysisError", json);
     }
   }
 
   Map<String, dynamic> toJson() {
     Map<String, dynamic> result = {};
     result["severity"] = severity.toJson();
     result["type"] = type.toJson();
     result["location"] = location.toJson();
     result["message"] = message;
     if (correction != null) {
       result["correction"] = correction;
     }
+    result["code"] = code;
     if (hasFix != null) {
       result["hasFix"] = hasFix;
     }
     return result;
   }
 
   @override
   String toString() => JSON.encode(toJson());
 
   @override
   bool operator==(other) {
     if (other is AnalysisError) {
       return severity == other.severity &&
           type == other.type &&
           location == other.location &&
           message == other.message &&
           correction == other.correction &&
+          code == other.code &&
           hasFix == other.hasFix;
     }
     return false;
   }
 
   @override
   int get hashCode {
     int hash = 0;
     hash = JenkinsSmiHash.combine(hash, severity.hashCode);
     hash = JenkinsSmiHash.combine(hash, type.hashCode);
     hash = JenkinsSmiHash.combine(hash, location.hashCode);
     hash = JenkinsSmiHash.combine(hash, message.hashCode);
     hash = JenkinsSmiHash.combine(hash, correction.hashCode);
+    hash = JenkinsSmiHash.combine(hash, code.hashCode);
     hash = JenkinsSmiHash.combine(hash, hasFix.hashCode);
     return JenkinsSmiHash.finish(hash);
   }
 }
 
 /**
  * AnalysisErrorFixes
  *
  * {
  *   "error": AnalysisError
@@ skipping 8895 matching lines @@
     return false;
   }
 
   @override
   int get hashCode {
     int hash = 0;
     hash = JenkinsSmiHash.combine(hash, newName.hashCode);
     return JenkinsSmiHash.finish(hash);
   }
 }