Merge pull request #61565 from 333fred/merges/main-to-features/requir…

…ed-members Merge main to features/required-members
dotnet · May 27, 2022 · 087e571 · 087e571
2 parents ba92379 + 91b259d
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diff --git a/docs/Language Feature Status.md b/docs/Language Feature Status.md
@@ -10,8 +10,11 @@ efforts behind them.
 
 | Feature | Branch | State | Developer | Reviewer | LDM Champ |
 | ------- | ------ | ----- | --------- | -------- | --------- |
+| [DIM for Static Members](https://github.com/dotnet/csharplang/issues/4436) | [DefaultInterfaceImplementation](https://github.com/dotnet/roslyn/tree/features/DefaultInterfaceImplementation) | [Merged into 17.3p2](https://github.com/dotnet/roslyn/issues/60968) | [AlekseyTs](https://github.com/AlekseyTs) | [333fred](https://github.com/333fred), [jcouv](https://github.com/jcouv)  | [MadsTorgersen](https://github.com/MadsTorgersen) | 
+| [Numeric IntPtr](https://github.com/dotnet/csharplang/issues/6065) | [numeric-intptr](https://github.com/dotnet/roslyn/tree/features/numeric-intptr) | [Merged into 17.3p2](https://github.com/dotnet/roslyn/issues/60578) | [jcouv](https://github.com/jcouv) | [cston](https://github.com/cston), [333fred](https://github.com/333fred) | [jcouv](https://github.com/jcouv) | 
 | [Unsigned Right Shift](https://github.com/dotnet/csharplang/issues/4682) | [UnsignedRightShift](https://github.com/dotnet/roslyn/tree/features/UnsignedRightShift) | [Merged into 17.3p1](https://github.com/dotnet/roslyn/issues/60433) | [AlekseyTs](https://github.com/AlekseyTs) | [333fred](https://github.com/333fred), [jcouv](https://github.com/jcouv)  | [AlekseyTs](https://github.com/AlekseyTs) | 
 | [Utf8 String Literals](https://github.com/dotnet/csharplang/issues/184) | [Utf8StringLiterals](https://github.com/dotnet/roslyn/tree/features/Utf8StringLiterals) | [Merged into 17.3p1](https://github.com/dotnet/roslyn/issues/58848) | [AlekseyTs](https://github.com/AlekseyTs) | [cston](https://github.com/cston), [RikkiGibson](https://github.com/RikkiGibson) | [MadsTorgersen](https://github.com/MadsTorgersen) |
+| [Pattern matching on `ReadOnlySpan<char>`](https://github.com/dotnet/csharplang/issues/1881) | [patterns-span-char](https://github.com/dotnet/roslyn/tree/features/patterns-span-char) | [Merged into 17.3p1](https://github.com/dotnet/roslyn/issues/59191) | [YairHalberstadt ](https://github.com/YairHalberstadt) | [cston](https://github.com/cston), [RikkiGibson](https://github.com/RikkiGibson) | [jcouv](https://github.com/jcouv) |
 | [Checked Operators](https://github.com/dotnet/csharplang/issues/4665) | [CheckedUserDefinedOperators](https://github.com/dotnet/roslyn/tree/features/CheckedUserDefinedOperators) | [Merged into 17.3p1](https://github.com/dotnet/roslyn/issues/59458) | [AlekseyTs](https://github.com/AlekseyTs) | [333fred](https://github.com/333fred), [chsienki](https://github.com/chsienki) | [AlekseyTs](https://github.com/AlekseyTs) | 
 | [auto-default structs](https://github.com/dotnet/csharplang/issues/5737) | main | [Merged into 17.3p1](https://github.com/dotnet/roslyn/issues/60167) | [RikkiGibson](https://github.com/RikkiGibson) | [cston](https://github.com/cston), [jcouv](https://github.com/jcouv) | 
 | [Newlines in interpolations](https://github.com/dotnet/csharplang/issues/4935) | main | [Merged in 17.1p1](https://github.com/dotnet/roslyn/issues/57154) | [CyrusNajmabadi](https://github.com/CyrusNajmabadi) | [jcouv](https://github.com/jcouv), [chsienki](https://github.com/chsienki) | [CyrusNajmabadi](https://github.com/CyrusNajmabadi) |
@@ -28,12 +31,9 @@ efforts behind them.
 | [Top Level statement attribute specifiers](https://github.com/dotnet/csharplang/issues/5045) | [main-attributes](https://github.com/dotnet/roslyn/tree/features/main-attributes) | [In Progress](https://github.com/dotnet/roslyn/issues/57047) | [chsienki](https://github.com/chsienki) | [cston](https://github.com/cston), [333fred](https://github.com/333fred) | [jaredpar](https://github.com/jaredpar) |
 | [Primary Constructors](https://github.com/dotnet/csharplang/issues/2691) | [primary-constructors](https://github.com/dotnet/roslyn/tree/features/primary-constructors) | [In Progress](https://github.com/dotnet/roslyn/issues/57048) | TBD | TBD | [MadsTorgersen](https://github.com/MadsTorgersen) |
 | [Params Span\<T> + Stackalloc any array type](https://github.com/dotnet/csharplang/issues/1757) | [params-span](https://github.com/dotnet/roslyn/tree/features/params-span) | [In Progress](https://github.com/dotnet/roslyn/issues/57049) | [cston](https://github.com/cston) | TBD | [jaredpar](https://github.com/jaredpar) |
-| [Pattern matching on `ReadOnlySpan<char>`](https://github.com/dotnet/csharplang/issues/1881) | [patterns-span-char](https://github.com/dotnet/roslyn/tree/features/patterns-span-char) | [Merged into 17.3p1](https://github.com/dotnet/roslyn/issues/59191) | [YairHalberstadt ](https://github.com/YairHalberstadt) | [cston](https://github.com/cston), [RikkiGibson](https://github.com/RikkiGibson) | [jcouv](https://github.com/jcouv) |
 | [nameof accessing instance members](https://github.com/dotnet/roslyn/issues/40229) | main | [In Progress](https://github.com/dotnet/roslyn/pull/48754) | [YairHalberstadt ](https://github.com/YairHalberstadt) | [333fred](https://github.com/333fred), [AlekseyTs](https://github.com/AlekseyTs)  | [333fred](https://github.com/333fred) |
 | [ref fields](https://github.com/dotnet/csharplang/blob/main/proposals/low-level-struct-improvements.md) | [ref-fields](https://github.com/dotnet/roslyn/tree/features/ref-fields) | [In Progress](https://github.com/dotnet/roslyn/issues/59194) | [cston](https://github.com/cston) | [RikkiGibson](https://github.com/RikkiGibson), [AlekseyTs](https://github.com/AlekseyTs) | [jaredpar](https://github.com/jaredpar) | 
-| [Numeric IntPtr](https://github.com/dotnet/csharplang/issues/6065) | [numeric-intptr](https://github.com/dotnet/roslyn/tree/features/numeric-intptr) | [In Progress](https://github.com/dotnet/roslyn/issues/60578) | [jcouv](https://github.com/jcouv) | [cston](https://github.com/cston), [333fred](https://github.com/333fred) | [jcouv](https://github.com/jcouv) | 
 | [File types](https://github.com/dotnet/csharplang/issues/6011) | [file-types](https://github.com/dotnet/roslyn/tree/features/file-types) | [In Progress](https://github.com/dotnet/roslyn/issues/60819) | [RikkiGibson](https://github.com/RikkiGibson) | [jcouv](https://github.com/jcouv), [cston](https://github.com/cston)  | [stephentoub](https://github.com/stephentoub) | 
-| [DIM for Static Members](https://github.com/dotnet/csharplang/issues/4436) | [DefaultInterfaceImplementation](https://github.com/dotnet/roslyn/tree/features/DefaultInterfaceImplementation) | [In Progress](https://github.com/dotnet/roslyn/issues/60968) | [AlekseyTs](https://github.com/AlekseyTs) | [333fred](https://github.com/333fred), [jcouv](https://github.com/jcouv)  | [MadsTorgersen](https://github.com/MadsTorgersen) | 
 
 # C# 10.0
 

diff --git a/docs/TestAccessor Pattern.md b/docs/TestAccessor Pattern.md
@@ -0,0 +1,45 @@
+# The `TestAccessor` Pattern
+
+The `TestAccessor` pattern allows production code to expose internal functionality for test purposes without making the internal functionality available to other production code. The pattern has two primary components:
+
+1. A `TestAccessor` type, which contains the functionality available only for testing
+2. A `GetTestAccessor()` method, which returns an instance of `TestAccessor`
+
+The pattern relies on enforcement of a simple rule that no production code is allowed to call a `GetTestAccessor()` method. This is enforceable either through code reviews or through an analyzer. This pattern has many advantages over alternatives:
+
+* The pattern does not require expanded accessibility (e.g. `internal` instead of `private`) for the purpose of testing
+* The pattern is self-documenting: all properties and methods within a `TestAccessor` type are intended only for use in test code
+* The pattern is consistent enough to enforce through static analysis (analyzers)
+* The pattern is simple enough to enforce manually (code reviews)
+
+## The `TestAccessor` Type
+
+The `TestAccessor` type is typically defined as a nested structure. In the following example, the `SomeProductionType.TestAccessor.PrivateStateData` property allows test code to read and write the value of the private field `SomeProductionType._privateStateData` without exposing the `_privateStateData` field to other production code.
+
+```csharp
+internal class SomeProductionType
+{
+  private int _privateStateData;
+
+  internal readonly struct TestAccessor
+  {
+    private readonly SomeProductionType _instance;
+
+    internal TestAccessor(SomeProductionType instance)
+    {
+      _instance = instance;
+    }
+
+    internal ref int PrivateStateData => ref _instance._privateStateData;
+  }
+}
+```
+
+## The `GetTestAccessor()` Method
+
+The `GetTestAccessor()` method is always defined as follows:
+
+```csharp
+internal TestAccessor GetTestAccessor()
+  => new TestAccessor(this);
+```
diff --git a/eng/Versions.props b/eng/Versions.props
@@ -28,7 +28,7 @@
     <VisualStudioEditorPackagesVersion>17.2.3194</VisualStudioEditorPackagesVersion>
     <ILAsmPackageVersion>5.0.0-alpha1.19409.1</ILAsmPackageVersion>
     <ILDAsmPackageVersion>5.0.0-preview.1.20112.8</ILDAsmPackageVersion>
-    <MicrosoftVisualStudioLanguageServerProtocolPackagesVersion>17.3.5</MicrosoftVisualStudioLanguageServerProtocolPackagesVersion>
+    <MicrosoftVisualStudioLanguageServerProtocolPackagesVersion>17.3.15</MicrosoftVisualStudioLanguageServerProtocolPackagesVersion>
     <MicrosoftVisualStudioShellPackagesVersion>17.2.32505.113</MicrosoftVisualStudioShellPackagesVersion>
     <RefOnlyMicrosoftBuildPackagesVersion>16.5.0</RefOnlyMicrosoftBuildPackagesVersion>
     <!-- The version of Roslyn we build Source Generators against that are built in this
@@ -206,7 +206,7 @@
       is expected by the NET SDK used in the Workspace.MSBuild UnitTests. In order to test against the same verion of NuGet
       as our configured SDK, we must set the version to be the same.
      -->
-    <NuGetCommonVersion>6.2.0-preview.2.80</NuGetCommonVersion>
+    <NuGetCommonVersion>6.3.0-preview.1.32</NuGetCommonVersion>
     <NuGetConfigurationVersion>$(NuGetCommonVersion)</NuGetConfigurationVersion>
     <NuGetFrameworksVersion>$(NuGetCommonVersion)</NuGetFrameworksVersion>
     <NuGetPackagingVersion>$(NuGetCommonVersion)</NuGetPackagingVersion>

diff --git a/eng/config/OptProf.json b/eng/config/OptProf.json
@@ -271,53 +271,6 @@
         }
       ]
     },
-    {
-      "name": "Microsoft.CodeAnalysis.Compilers.x86.vsix",
-      "tests": [
-        {
-          "container": "TeamEng",
-          "filteredTestCases": [
-            {
-              "filename": "/Contents/MSBuild/Current/Bin/Roslyn/Microsoft.CodeAnalysis.CSharp.dll",
-              "testCases":[ "TeamEng.OptProfTest.vs_debugger_start_no_build_cs_scribble" ]
-            },
-            {
-              "filename": "/Contents/MSBuild/Current/Bin/Roslyn/Microsoft.CodeAnalysis.dll",
-              "testCases":[ "TeamEng.OptProfTest.vs_debugger_start_no_build_cs_scribble" ]
-            },
-            {
-              "filename": "/Contents/MSBuild/Current/Bin/Roslyn/Microsoft.CodeAnalysis.VisualBasic.dll",
-              "testCases":[ "TeamEng.OptProfTest.vs_debugger_start_no_build_cs_scribble" ]
-            },
-            {
-              "filename": "/Contents/MSBuild/Current/Bin/Roslyn/VBCSCompiler.exe",
-              "testCases":[ "TeamEng.OptProfTest.vs_debugger_start_no_build_cs_scribble" ]
-            }
-          ]
-        },
-        {
-          "container": "VSPE",
-          "filteredTestCases": [
-            {
-              "filename": "/Contents/MSBuild/Current/Bin/Roslyn/Microsoft.CodeAnalysis.CSharp.dll",
-              "testCases":[ "VSPE.OptProfTests.vs_perf_designtime_solution_build_vb_australiangovernment", "VSPE.OptProfTests.vs_perf_designtime_ide_searchtest", "VSPE.OptProfTests.DDRIT_RPS_ManagedLangs_Typing", "VSPE.OptProfTests.DDRIT_RPS_ManagedLangs_Debug" ]
-            },
-            {
-              "filename": "/Contents/MSBuild/Current/Bin/Roslyn/Microsoft.CodeAnalysis.dll",
-              "testCases":[ "VSPE.OptProfTests.vs_perf_designtime_solution_build_vb_australiangovernment", "VSPE.OptProfTests.vs_perf_designtime_ide_searchtest", "VSPE.OptProfTests.DDRIT_RPS_ManagedLangs_Typing", "VSPE.OptProfTests.DDRIT_RPS_ManagedLangs_Debug" ]
-            },
-            {
-              "filename": "/Contents/MSBuild/Current/Bin/Roslyn/Microsoft.CodeAnalysis.VisualBasic.dll",
-              "testCases":[ "VSPE.OptProfTests.vs_perf_designtime_solution_build_vb_australiangovernment", "VSPE.OptProfTests.vs_perf_designtime_ide_searchtest", "VSPE.OptProfTests.DDRIT_RPS_ManagedLangs_Debug" ]
-            },
-            {
-              "filename": "/Contents/MSBuild/Current/Bin/Roslyn/VBCSCompiler.exe",
-              "testCases":[ "VSPE.OptProfTests.vs_perf_designtime_solution_build_vb_australiangovernment", "VSPE.OptProfTests.vs_perf_designtime_ide_searchtest", "VSPE.OptProfTests.DDRIT_RPS_ManagedLangs_Debug" ]
-            }
-          ]
-        }
-      ]
-    },
     {
       "name": "Microsoft.CodeAnalysis.Compilers.x64.vsix",
       "tests": [
@@ -364,53 +317,6 @@
           ]
         }
       ]
-    },
-    {
-      "name": "Microsoft.CodeAnalysis.Compilers.arm64.vsix",
-      "tests": [
-        {
-          "container": "TeamEng",
-          "filteredTestCases": [
-            {
-              "filename": "/Contents/MSBuild/Current/Bin/Roslyn/Microsoft.CodeAnalysis.CSharp.dll",
-              "testCases":[ "TeamEng.OptProfTest.vs_debugger_start_no_build_cs_scribble" ]
-            },
-            {
-              "filename": "/Contents/MSBuild/Current/Bin/Roslyn/Microsoft.CodeAnalysis.dll",
-              "testCases":[ "TeamEng.OptProfTest.vs_debugger_start_no_build_cs_scribble" ]
-            },
-            {
-              "filename": "/Contents/MSBuild/Current/Bin/Roslyn/Microsoft.CodeAnalysis.VisualBasic.dll",
-              "testCases":[ "TeamEng.OptProfTest.vs_debugger_start_no_build_cs_scribble" ]
-            },
-            {
-              "filename": "/Contents/MSBuild/Current/Bin/Roslyn/VBCSCompiler.exe",
-              "testCases":[ "TeamEng.OptProfTest.vs_debugger_start_no_build_cs_scribble" ]
-            }
-          ]
-        },
-        {
-          "container": "VSPE",
-          "filteredTestCases": [
-            {
-              "filename": "/Contents/MSBuild/Current/Bin/Roslyn/Microsoft.CodeAnalysis.CSharp.dll",
-              "testCases":[ "VSPE.OptProfTests.vs_perf_designtime_solution_build_vb_australiangovernment", "VSPE.OptProfTests.vs_perf_designtime_ide_searchtest", "VSPE.OptProfTests.DDRIT_RPS_ManagedLangs_Typing", "VSPE.OptProfTests.DDRIT_RPS_ManagedLangs_Debug" ]
-            },
-            {
-              "filename": "/Contents/MSBuild/Current/Bin/Roslyn/Microsoft.CodeAnalysis.dll",
-              "testCases":[ "VSPE.OptProfTests.vs_perf_designtime_solution_build_vb_australiangovernment", "VSPE.OptProfTests.vs_perf_designtime_ide_searchtest", "VSPE.OptProfTests.DDRIT_RPS_ManagedLangs_Typing", "VSPE.OptProfTests.DDRIT_RPS_ManagedLangs_Debug" ]
-            },
-            {
-              "filename": "/Contents/MSBuild/Current/Bin/Roslyn/Microsoft.CodeAnalysis.VisualBasic.dll",
-              "testCases":[ "VSPE.OptProfTests.vs_perf_designtime_solution_build_vb_australiangovernment", "VSPE.OptProfTests.vs_perf_designtime_ide_searchtest", "VSPE.OptProfTests.DDRIT_RPS_ManagedLangs_Debug" ]
-            },
-            {
-              "filename": "/Contents/MSBuild/Current/Bin/Roslyn/VBCSCompiler.exe",
-              "testCases":[ "VSPE.OptProfTests.vs_perf_designtime_solution_build_vb_australiangovernment", "VSPE.OptProfTests.vs_perf_designtime_ide_searchtest", "VSPE.OptProfTests.DDRIT_RPS_ManagedLangs_Debug" ]
-            }
-          ]
-        }
-      ]
     }
   ],
   "assemblies": [    

diff --git a/eng/config/PublishData.json b/eng/config/PublishData.json
@@ -129,6 +129,16 @@
       "insertionTitlePrefix": "[d17.3p1]"
     },
     "main": {
+      "nugetKind": [
+        "Shipping",
+        "NonShipping"
+      ],
+      "vsBranch": "main",
+      "vsMajorVersion": 17,
+      "insertionTitlePrefix": "[Validation]",
+      "insertionCreateDraftPR": true
+    },
+    "main-vs-deps": {
       "nugetKind": [
         "Shipping",
         "NonShipping"

diff --git a/global.json b/global.json
@@ -1,15 +1,15 @@
 {
   "sdk": {
-    "version": "7.0.100-preview.2.22153.17",
+    "version": "7.0.100-preview.4.22252.9",
     "allowPrerelease": true,
     "rollForward": "latestPatch"
   },
   "tools": {
-    "dotnet": "7.0.100-preview.2.22153.17",
+    "dotnet": "7.0.100-preview.4.22252.9",
     "vs": {
-      "version": "16.10"
+      "version": "17.0"
     },
-    "xcopy-msbuild": "16.10.0-preview2"
+    "xcopy-msbuild": "17.1.0"
   },
   "msbuild-sdks": {
     "Microsoft.DotNet.Arcade.Sdk": "7.0.0-beta.22225.6",

diff --git a/src/Analyzers/CSharp/Analyzers/CSharpAnalyzers.projitems b/src/Analyzers/CSharp/Analyzers/CSharpAnalyzers.projitems
@@ -111,7 +111,6 @@
     <Compile Include="$(MSBuildThisFileDirectory)UseIsNullCheck\CSharpUseNullCheckOverTypeCheckDiagnosticAnalyzer.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)UseIsNullCheck\CSharpUseIsNullCheckForCastAndEqualityOperatorDiagnosticAnalyzer.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)UseIsNullCheck\CSharpUseIsNullCheckForReferenceEqualsDiagnosticAnalyzer.cs" />
-    <Compile Include="$(MSBuildThisFileDirectory)UseParameterNullChecking\CSharpUseParameterNullCheckingDiagnosticAnalyzer.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)UseTupleSwap\CSharpUseTupleSwapDiagnosticAnalyzer.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)UseLocalFunction\CSharpUseLocalFunctionDiagnosticAnalyzer.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)UseNullPropagation\CSharpUseNullPropagationDiagnosticAnalyzer.cs" />

diff --git a/src/Analyzers/CSharp/Analyzers/CSharpAnalyzersResources.resx b/src/Analyzers/CSharp/Analyzers/CSharpAnalyzersResources.resx
@@ -346,9 +346,6 @@
   <data name="Use_tuple_to_swap_values" xml:space="preserve">
     <value>Use tuple to swap values</value>
   </data>
-  <data name="Use_parameter_null_checking" xml:space="preserve">
-    <value>Use parameter null checking</value>
-  </data>
   <data name="Lambda_expression_can_be_removed" xml:space="preserve">
     <value>Lambda expression can be removed</value>
   </data>

diff --git a/src/Analyzers/CSharp/Analyzers/CodeStyle/CSharpAnalyzerOptionsProvider.cs b/src/Analyzers/CSharp/Analyzers/CodeStyle/CSharpAnalyzerOptionsProvider.cs
@@ -47,7 +47,6 @@ public CSharpAnalyzerOptionsProvider(AnalyzerConfigOptions options, AnalyzerOpti
     public CodeStyleOption2<bool> VarWhenTypeIsApparent => GetOption(CSharpCodeStyleOptions.VarWhenTypeIsApparent, FallbackSimplifierOptions.VarWhenTypeIsApparent);
     public CodeStyleOption2<bool> VarElsewhere => GetOption(CSharpCodeStyleOptions.VarElsewhere, FallbackSimplifierOptions.VarElsewhere);
     public CodeStyleOption2<bool> PreferSimpleDefaultExpression => GetOption(CSharpCodeStyleOptions.PreferSimpleDefaultExpression, FallbackSimplifierOptions.PreferSimpleDefaultExpression);
-    public CodeStyleOption2<bool> PreferParameterNullChecking => GetOption(CSharpCodeStyleOptions.PreferParameterNullChecking, FallbackSimplifierOptions.PreferParameterNullChecking);
     public CodeStyleOption2<bool> AllowEmbeddedStatementsOnSameLine => GetOption(CSharpCodeStyleOptions.AllowEmbeddedStatementsOnSameLine, FallbackSimplifierOptions.AllowEmbeddedStatementsOnSameLine);
     public CodeStyleOption2<bool> PreferThrowExpression => GetOption(CSharpCodeStyleOptions.PreferThrowExpression, FallbackSimplifierOptions.PreferThrowExpression);
     public CodeStyleOption2<PreferBracesPreference> PreferBraces => GetOption(CSharpCodeStyleOptions.PreferBraces, FallbackSimplifierOptions.PreferBraces);