[ddc] Enforce unnecessary_breaks lint

Ignore violations in the js_ast sub-directory to avoid unnecessary diffs
with the original package.

Change-Id: Iac8c942e5e2446b8433e2073b546c28e42a8f5cf
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/392700
Reviewed-by: Kevin Moore <[email protected]>
Commit-Queue: Nicholas Shahan <[email protected]>

Author: nshahan

pkg/dev_compiler/analysis_options.yaml

@@ -27,3 +27,4 @@ linter:
     - prefer_single_quotes
     - prefer_relative_imports
     - unawaited_futures
+    - unnecessary_breaks

pkg/dev_compiler/lib/src/js_ast/printer.dart

@@ -2,7 +2,7 @@
 // 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.
 
-// ignore_for_file: omit_local_variable_types
+// ignore_for_file: omit_local_variable_types, unnecessary_breaks
 
 import 'characters.dart' as char_codes;
 import 'nodes.dart';

pkg/dev_compiler/lib/src/kernel/compiler.dart

@@ -763,10 +763,8 @@ class ProgramCompiler extends ComputeOnceConstantVisitor<js_ast.Expression>
     switch (component.mode) {
       case NonNullableByDefaultCompiledMode.Strong:
         soundNullSafety = js_ast.LiteralBool(true);
-        break;
       case NonNullableByDefaultCompiledMode.Weak:
         soundNullSafety = js_ast.LiteralBool(false);
-        break;
       default:
         throw StateError('Unsupported Null Safety mode ${component.mode}, '
             'in ${component.location?.file}.');
@@ -2952,7 +2950,6 @@ class ProgramCompiler extends ComputeOnceConstantVisitor<js_ast.Expression>
       // Reserved by JS, not a valid static member name.
       case 'prototype':
         name += '_';
-        break;
       default:
         // All trailing underscores static names are reserved for the compiler
         // or SDK libraries.
@@ -3656,7 +3653,6 @@ class ProgramCompiler extends ComputeOnceConstantVisitor<js_ast.Expression>
             wrapBody:
                 _emitTopLevelNameNoExternalInterop(_asyncWrapJsFunctionMember),
             bodyName: bodyName);
-        break;
       case AsyncMarker.SyncStar:
         asyncRewriter = SyncStarRewriter(
             makeSyncStarIterable:
@@ -3669,7 +3665,6 @@ class ProgramCompiler extends ComputeOnceConstantVisitor<js_ast.Expression>
             yieldStarSelector: _emitMemberName('_yieldStar',
                 member: _syncStarIteratorYieldStarMember),
             bodyName: bodyName);
-        break;
       case AsyncMarker.AsyncStar:
         asyncRewriter = AsyncStarRewriter(
             asyncStarHelper:
@@ -3686,7 +3681,6 @@ class ProgramCompiler extends ComputeOnceConstantVisitor<js_ast.Expression>
             wrapBody:
                 _emitTopLevelNameNoExternalInterop(_asyncWrapJsFunctionMember),
             bodyName: bodyName);
-        break;
     }
     if (asyncRewriter != null) {
       return asyncRewriter.rewrite(fun, functionBody, functionEnd,
@@ -6684,7 +6678,6 @@ class ProgramCompiler extends ComputeOnceConstantVisitor<js_ast.Expression>
             var rti = _emitType(mapType);
             return js.call('new #.new(#)', [mapClass, rti]);
           }
-          break;
         case 'Set':
         case 'HashSet':
         case 'LinkedHashSet':
@@ -6699,12 +6692,10 @@ class ProgramCompiler extends ComputeOnceConstantVisitor<js_ast.Expression>
             var rti = _emitType(setType);
             return js.call('new #.new(#)', [setClass, rti]);
           }
-          break;
         case 'List':
           if (ctor.name.text == '') {
             return _emitList(type.typeArguments[0], []);
           }
-          break;
       }
     }
     var rti = _requiresRtiForInstantiation(ctorClass)

pkg/dev_compiler/lib/src/kernel/compiler_new.dart

@@ -893,10 +893,8 @@ class LibraryCompiler extends ComputeOnceConstantVisitor<js_ast.Expression>
     switch (_component.mode) {
       case NonNullableByDefaultCompiledMode.Strong:
         soundNullSafety = js_ast.LiteralBool(true);
-        break;
       case NonNullableByDefaultCompiledMode.Weak:
         soundNullSafety = js_ast.LiteralBool(false);
-        break;
       default:
         throw StateError('Unsupported Null Safety mode ${_component.mode}, '
             'in ${_component.location?.file}.');
@@ -3125,7 +3123,6 @@ class LibraryCompiler extends ComputeOnceConstantVisitor<js_ast.Expression>
       // Reserved by JS, not a valid static member name.
       case 'prototype':
         name += '_';
-        break;
       default:
         // All trailing underscores static names are reserved for the compiler
         // or SDK libraries.
@@ -3829,7 +3826,6 @@ class LibraryCompiler extends ComputeOnceConstantVisitor<js_ast.Expression>
             wrapBody:
                 _emitTopLevelNameNoExternalInterop(_asyncWrapJsFunctionMember),
             bodyName: bodyName);
-        break;
       case AsyncMarker.SyncStar:
         asyncRewriter = SyncStarRewriter(
             makeSyncStarIterable:
@@ -3842,7 +3838,6 @@ class LibraryCompiler extends ComputeOnceConstantVisitor<js_ast.Expression>
             yieldStarSelector: _emitMemberName('_yieldStar',
                 member: _syncStarIteratorYieldStarMember),
             bodyName: bodyName);
-        break;
       case AsyncMarker.AsyncStar:
         asyncRewriter = AsyncStarRewriter(
             asyncStarHelper:
@@ -3859,7 +3854,6 @@ class LibraryCompiler extends ComputeOnceConstantVisitor<js_ast.Expression>
             wrapBody:
                 _emitTopLevelNameNoExternalInterop(_asyncWrapJsFunctionMember),
             bodyName: bodyName);
-        break;
     }
     if (asyncRewriter != null) {
       return asyncRewriter.rewrite(fun, functionBody, functionEnd,
@@ -6856,7 +6850,6 @@ class LibraryCompiler extends ComputeOnceConstantVisitor<js_ast.Expression>
             var rti = _emitType(mapType);
             return js.call('new #.new(#)', [mapClass, rti]);
           }
-          break;
         case 'Set':
         case 'HashSet':
         case 'LinkedHashSet':
@@ -6871,12 +6864,10 @@ class LibraryCompiler extends ComputeOnceConstantVisitor<js_ast.Expression>
             var rti = _emitType(setType);
             return js.call('new #.new(#)', [setClass, rti]);
           }
-          break;
         case 'List':
           if (ctor.name.text == '') {
             return _emitList(type.typeArguments[0], []);
           }
-          break;
       }
     }
     var rti = _requiresRtiForInstantiation(ctorClass)

pkg/dev_compiler/lib/src/kernel/expression_compiler_worker.dart

@@ -287,11 +287,9 @@ class ExpressionCompilerWorker {
           case 'UpdateDeps':
             sendResponse(await _updateDependencies(
                 UpdateDependenciesRequest.fromJson(request)));
-            break;
           case 'CompileExpression':
             sendResponse(await _compileExpression(
                 CompileExpressionRequest.fromJson(request)));
-            break;
           default:
             throw ArgumentError(
                 'Unrecognized command `$command`, full request was `$request`');
@@ -787,13 +785,10 @@ void Function(DiagnosticMessage) _onDiagnosticHandler(
         case Severity.error:
         case Severity.internalProblem:
           errors.add(message.plainTextFormatted.join('\n'));
-          break;
         case Severity.warning:
           warnings.add(message.plainTextFormatted.join('\n'));
-          break;
         case Severity.info:
           infos.add(message.plainTextFormatted.join('\n'));
-          break;
         case Severity.context:
         case Severity.ignored:
           throw 'Unexpected severity: ${message.severity}';

pkg/dev_compiler/test/expression_compiler/expression_compiler_e2e_suite.dart

@@ -223,7 +223,6 @@ class ExpressionEvaluationTestDriver {
   };
 </script>
 ''');
-        break;
       case ModuleFormat.amd:
         var dartSdkPathNoExtension = escaped(SetupCompilerOptions.buildRoot
             .resolve(p.join(
@@ -288,7 +287,6 @@ class ExpressionEvaluationTestDriver {
 </script>
 ''');
 
-        break;
       default:
         throw Exception('Unsupported module format for SDK evaluation tests: '
             '${setup.moduleFormat}');
@@ -841,7 +839,6 @@ class ExpressionEvaluationTestDriver {
     switch (type) {
       case 'function':
         str = obj.description ?? '';
-        break;
       case 'object':
         if (obj.subtype == 'null') {
           return 'null';
@@ -860,10 +857,8 @@ class ExpressionEvaluationTestDriver {
         } catch (e, s) {
           throw StateError('Failed to stringify remote object $obj: $e:$s');
         }
-        break;
       default:
         str = '${obj.value}';
-        break;
     }
     return str;
   }

pkg/dev_compiler/test/hot_reload_suite.dart

@@ -195,7 +195,6 @@ Future<void> main(List<String> args) async {
         '--target=dartdevc',
       ];
       controller = HotReloadFrontendServerController(fesArgs);
-      break;
     case RuntimePlatforms.vm:
       final vmPlatformDillFromSdkRoot = fe_shared.relativizeUri(
           sdkRoot, vmPlatformDillUri, fe_shared.isWindows);
@@ -205,7 +204,6 @@ Future<void> main(List<String> args) async {
         '--target=vm',
       ];
       controller = HotReloadFrontendServerController(fesArgs);
-      break;
   }
   controller.start();
 
@@ -424,7 +422,6 @@ Future<void> main(List<String> args) async {
             }
           });
         });
-        break;
       case DiffMode.write:
         _print('Generating source file diffs.', label: testName);
         filesByGeneration.forEach((basename, filesQueue) {
@@ -462,7 +459,6 @@ Future<void> main(List<String> args) async {
             reportDiffOutcome(file, 'diff updated for $file', true);
           });
         });
-        break;
       case DiffMode.ignore:
         _print('Ignoring source file diffs.', label: testName);
         filesByGeneration.forEach((basename, filesQueue) {
@@ -471,7 +467,6 @@ Future<void> main(List<String> args) async {
             reportDiffOutcome(file, 'Ignoring diff for $file', true);
           });
         });
-        break;
     }
 
     // Skip this test directory if this platform is excluded.
@@ -658,7 +653,6 @@ Future<void> main(List<String> args) async {
         final d8ExitCode = await d8Suite.runTest(testName: testName);
         testPassed = d8ExitCode == 0;
         await d8Suite.teardownTest(testName: testName);
-        break;
       case RuntimePlatforms.chrome:
         // Run the compiled JS generations with Chrome.
         _print('Creating Chrome hot reload test suite.', label: testName);
@@ -683,7 +677,6 @@ Future<void> main(List<String> args) async {
         final exitCode = await suite.runTest(testName: testName);
         testPassed = exitCode == 0;
         await suite.teardownTest(testName: testName);
-        break;
       case RuntimePlatforms.vm:
         final firstGenerationDillUri =
             tempUri.resolve('generation0/$testName.dill');