Remove dependency on all Roslyn assemblies from build host

Roslyn.sln

@@ -1698,6 +1698,8 @@ Global
 		src\ExpressionEvaluator\Core\Source\ResultProvider\ResultProvider.projitems*{abdbac1e-350e-4dc3-bb45-3504404545ee}*SharedItemsImports = 5
 		src\ExpressionEvaluator\VisualBasic\Source\ResultProvider\BasicResultProvider.projitems*{ace53515-482c-4c6a-e2d2-4242a687dfee}*SharedItemsImports = 5
 		src\Compilers\CSharp\csc\CscCommandLine.projitems*{b021ccbc-b2af-4560-af28-ed055f0ed696}*SharedItemsImports = 13
+		src\Dependencies\Collections\Microsoft.CodeAnalysis.Collections.projitems*{b1481d94-682e-46ec-adbe-a16eb46feee9}*SharedItemsImports = 5
+		src\Dependencies\PooledObjects\Microsoft.CodeAnalysis.PooledObjects.projitems*{b1481d94-682e-46ec-adbe-a16eb46feee9}*SharedItemsImports = 5
 		src\Compilers\CSharp\CSharpAnalyzerDriver\CSharpAnalyzerDriver.projitems*{b501a547-c911-4a05-ac6e-274a50dff30e}*SharedItemsImports = 5
 		src\ExpressionEvaluator\Core\Source\ResultProvider\ResultProvider.projitems*{bb3ca047-5d00-48d4-b7d3-233c1265c065}*SharedItemsImports = 13
 		src\ExpressionEvaluator\CSharp\Source\ResultProvider\CSharpResultProvider.projitems*{bf9dac1e-3a5e-4dc3-bb44-9a64e0d4e9d4}*SharedItemsImports = 5

src/Compilers/Core/Portable/CaseInsensitiveComparison.cs

@@ -15,7 +15,12 @@ namespace Microsoft.CodeAnalysis
     /// <summary>
     /// Case-insensitive operations (mostly comparison) on unicode strings.
     /// </summary>
-    public static class CaseInsensitiveComparison
+#if COMPILERCORE
+    public
+#else
+    internal
+#endif
+    static class CaseInsensitiveComparison
     {
         // PERF: Cache a TextInfo for Unicode ToLower since this will be accessed very frequently
         private static readonly TextInfo s_unicodeCultureTextInfo = GetUnicodeCulture().TextInfo;

src/Compilers/Core/Portable/Collections/ImmutableArrayExtensions.cs

@@ -764,19 +764,6 @@ public static ImmutableArray<T> Distinct<T>(this ImmutableArray<T> array, IEqual
             return result;
         }
 
-        internal static bool HasAnyErrors<T>(this ImmutableArray<T> diagnostics) where T : Diagnostic
-        {
-            foreach (var diagnostic in diagnostics)
-            {
-                if (diagnostic.Severity == DiagnosticSeverity.Error)
-                {
-                    return true;
-                }
-            }
-
-            return false;
-        }
-
         // In DEBUG, swap the first and last elements of a read-only array, yielding a new read only array.
         // This helps to avoid depending on accidentally sorted arrays.
         internal static ImmutableArray<T> ConditionallyDeOrder<T>(this ImmutableArray<T> array)
@@ -1034,8 +1021,8 @@ internal static void CreateNameToMembersMap<TKey, TNamespaceOrTypeSymbol, TNamed
             where TNamedTypeSymbol : class, TNamespaceOrTypeSymbol
             where TNamespaceSymbol : class, TNamespaceOrTypeSymbol
         {
-            foreach (var (name, value) in dictionary)
-                result.Add(name, createMembers(value));
+            foreach (var entry in dictionary)
+                result.Add(entry.Key, createMembers(entry.Value));
 
             return;
 
@@ -1076,11 +1063,11 @@ internal static Dictionary<TKey, ImmutableArray<TNamedTypeSymbol>> GetTypesFromM
 
             var dictionary = new Dictionary<TKey, ImmutableArray<TNamedTypeSymbol>>(capacity, comparer);
 
-            foreach (var (name, members) in map)
+            foreach (var entry in map)
             {
-                var namedTypes = getOrCreateNamedTypes(members);
+                var namedTypes = getOrCreateNamedTypes(entry.Value);
                 if (namedTypes.Length > 0)
-                    dictionary.Add(name, namedTypes);
+                    dictionary.Add(entry.Key, namedTypes);
             }
 
             return dictionary;

src/Compilers/Core/Portable/Diagnostic/DiagnosticArrayExtensions.cs

@@ -0,0 +1,23 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using System.Collections.Immutable;
+
+namespace Microsoft.CodeAnalysis;
+
+internal static class DiagnosticArrayExtensions
+{
+    internal static bool HasAnyErrors<T>(this ImmutableArray<T> diagnostics) where T : Diagnostic
+    {
+        foreach (var diagnostic in diagnostics)
+        {
+            if (diagnostic.Severity == DiagnosticSeverity.Error)
+            {
+                return true;
+            }
+        }
+
+        return false;
+    }
+}

src/Compilers/Core/Portable/EncodedStringText.cs

@@ -139,7 +139,7 @@ private static SourceText Decode(
                 data.Seek(0, SeekOrigin.Begin);
 
                 // For small streams, see if we can read the byte buffer directly.
-                if (encoding.GetMaxCharCountOrThrowIfHuge(data) < LargeObjectHeapLimitInChars)
+                if (encoding.TryGetMaxCharCount(data.Length, out int maxCharCount) && maxCharCount < LargeObjectHeapLimitInChars)
                 {
                     if (TryGetBytesFromStream(data, out ArraySegment<byte> bytes) && bytes.Offset == 0 && bytes.Array is object)
                     {

src/Compilers/Core/Portable/InternalUtilities/EncodingExtensions.cs

@@ -2,39 +2,13 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
-using Microsoft.CodeAnalysis;
 using System;
-using System.Diagnostics;
-using System.IO;
 using System.Text;
 
 namespace Microsoft.CodeAnalysis
 {
     internal static partial class EncodingExtensions
     {
-        /// <summary>
-        /// Get maximum char count needed to decode the entire stream.
-        /// </summary>
-        /// <exception cref="IOException">Stream is so big that max char count can't fit in <see cref="int"/>.</exception> 
-        internal static int GetMaxCharCountOrThrowIfHuge(this Encoding encoding, Stream stream)
-        {
-            Debug.Assert(stream.CanSeek);
-            long length = stream.Length;
-
-            if (encoding.TryGetMaxCharCount(length, out int maxCharCount))
-            {
-                return maxCharCount;
-            }
-
-#if CODE_STYLE
-            throw new IOException(CodeStyleResources.Stream_is_too_long);
-#elif WORKSPACE
-            throw new IOException(WorkspacesResources.Stream_is_too_long);
-#else
-            throw new IOException(CodeAnalysisResources.StreamIsTooLong);
-#endif
-        }
-
         internal static bool TryGetMaxCharCount(this Encoding encoding, long length, out int maxCharCount)
         {
             maxCharCount = 0;

src/Compilers/Core/Portable/InternalUtilities/EnumUtilties.cs

@@ -11,45 +11,6 @@ namespace Roslyn.Utilities
 {
     internal static class EnumUtilities
     {
-        /// <summary>
-        /// Convert a boxed primitive (generally of the backing type of an enum) into a ulong.
-        /// </summary>
-        /// <remarks>
-        /// </remarks>
-        internal static ulong ConvertEnumUnderlyingTypeToUInt64(object value, SpecialType specialType)
-        {
-            RoslynDebug.Assert(value != null);
-            Debug.Assert(value.GetType().GetTypeInfo().IsPrimitive);
-
-            unchecked
-            {
-                switch (specialType)
-                {
-                    case SpecialType.System_SByte:
-                        return (ulong)(sbyte)value;
-                    case SpecialType.System_Int16:
-                        return (ulong)(short)value;
-                    case SpecialType.System_Int32:
-                        return (ulong)(int)value;
-                    case SpecialType.System_Int64:
-                        return (ulong)(long)value;
-                    case SpecialType.System_Byte:
-                        return (byte)value;
-                    case SpecialType.System_UInt16:
-                        return (ushort)value;
-                    case SpecialType.System_UInt32:
-                        return (uint)value;
-                    case SpecialType.System_UInt64:
-                        return (ulong)value;
-
-                    default:
-                        // not using ExceptionUtilities.UnexpectedValue() because this is used by the Services layer
-                        // which doesn't have those utilities.
-                        throw new InvalidOperationException(string.Format("{0} is not a valid underlying type for an enum", specialType));
-                }
-            }
-        }
-
         internal static T[] GetValues<T>() where T : struct
         {
             return (T[])Enum.GetValues(typeof(T));

src/Compilers/Core/Portable/InternalUtilities/TextKeyedCache.cs

@@ -3,16 +3,8 @@
 // See the LICENSE file in the project root for more information.
 
 using System;
-using System.Collections.Generic;
-using System.Diagnostics;
-using System.Diagnostics.CodeAnalysis;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-using Microsoft.CodeAnalysis.PooledObjects;
-using Microsoft.CodeAnalysis;
-using Microsoft.CodeAnalysis.Text;
 using System.Threading;
+using Microsoft.CodeAnalysis.PooledObjects;
 
 namespace Roslyn.Utilities
 {

src/Compilers/Core/Portable/SpecialTypeExtensions.cs

@@ -3,6 +3,7 @@
 // See the LICENSE file in the project root for more information.
 
 using System;
+using System.Diagnostics;
 using Roslyn.Utilities;
 
 namespace Microsoft.CodeAnalysis
@@ -364,5 +365,31 @@ public static SpecialType FromRuntimeTypeOfLiteralValue(object value)
         /// </summary>
         public static bool CanOptimizeBehavior(this SpecialType specialType)
             => specialType is >= SpecialType.System_Object and <= SpecialType.System_Runtime_CompilerServices_InlineArrayAttribute;
+
+        /// <summary>
+        /// Convert a boxed primitive (generally of the backing type of an enum) into a ulong.
+        /// </summary>
+        internal static ulong ConvertUnderlyingValueToUInt64(this SpecialType enumUnderlyingType, object value)
+        {
+            RoslynDebug.Assert(value != null);
+            Debug.Assert(value.GetType().IsPrimitive);
+
+            unchecked
+            {
+                return enumUnderlyingType switch
+                {
+                    SpecialType.System_SByte => (ulong)(sbyte)value,
+                    SpecialType.System_Int16 => (ulong)(short)value,
+                    SpecialType.System_Int32 => (ulong)(int)value,
+                    SpecialType.System_Int64 => (ulong)(long)value,
+                    SpecialType.System_Byte => (byte)value,
+                    SpecialType.System_UInt16 => (ushort)value,
+                    SpecialType.System_UInt32 => (uint)value,
+                    SpecialType.System_UInt64 => (ulong)value,
+                    _ => throw ExceptionUtilities.UnexpectedValue(enumUnderlyingType),
+                };
+            }
+        }
+
     }
 }

src/Compilers/Core/Portable/SymbolDisplay/AbstractSymbolDisplayVisitor.cs

@@ -235,7 +235,7 @@ private void AddFlagsEnumConstantValue(
         {
             Debug.Assert(enumType.EnumUnderlyingType is not null);
             var underlyingSpecialType = enumType.EnumUnderlyingType.SpecialType;
-            var constantValueULong = EnumUtilities.ConvertEnumUnderlyingTypeToUInt64(constantValue, underlyingSpecialType);
+            var constantValueULong = underlyingSpecialType.ConvertUnderlyingValueToUInt64(constantValue);
 
             var result = constantValueULong;
 
@@ -321,7 +321,7 @@ private static void GetSortedEnumFields(
                     var field = (IFieldSymbol)member;
                     if (field.HasConstantValue)
                     {
-                        var enumField = new EnumField(field.Name, EnumUtilities.ConvertEnumUnderlyingTypeToUInt64(field.ConstantValue, underlyingSpecialType), field);
+                        var enumField = new EnumField(field.Name, underlyingSpecialType.ConvertUnderlyingValueToUInt64(field.ConstantValue), field);
                         enumFields.Add(enumField);
                     }
                 }
@@ -334,7 +334,7 @@ private void AddNonFlagsEnumConstantValue(INamedTypeSymbol enumType, object cons
         {
             Debug.Assert(enumType.EnumUnderlyingType is not null);
             var underlyingSpecialType = enumType.EnumUnderlyingType.SpecialType;
-            var constantValueULong = EnumUtilities.ConvertEnumUnderlyingTypeToUInt64(constantValue, underlyingSpecialType);
+            var constantValueULong = underlyingSpecialType.ConvertUnderlyingValueToUInt64(constantValue);
 
             var enumFields = ArrayBuilder<EnumField>.GetInstance();
             GetSortedEnumFields(enumType, enumFields);

src/Compilers/Core/Portable/Symbols/LanguageNames.cs

@@ -7,7 +7,12 @@ namespace Microsoft.CodeAnalysis
     /// <summary>
     /// A class that provides constants for common language names.
     /// </summary>
-    public static class LanguageNames
+#if COMPILERCORE
+    public
+#else
+    internal
+#endif
+    static class LanguageNames
     {
         /// <summary>
         /// The common name used for the C# language.

src/Compilers/Core/Portable/Text/LargeText.cs

@@ -62,7 +62,7 @@ internal static SourceText Decode(Stream stream, Encoding encoding, SourceHashAl
                 return SourceText.From(string.Empty, encoding, checksumAlgorithm);
             }
 
-            var maxCharRemainingGuess = encoding.GetMaxCharCountOrThrowIfHuge(stream);
+            var maxCharRemainingGuess = GetMaxCharCountOrThrowIfHuge(encoding, stream);
             Debug.Assert(longLength > 0 && longLength <= int.MaxValue); // GetMaxCharCountOrThrowIfHuge should have thrown.
             int length = (int)longLength;
 

src/Compilers/Core/Portable/Text/SourceText.cs

@@ -201,7 +201,7 @@ public static SourceText From(
             if (stream.CanSeek)
             {
                 // If the resulting string would end up on the large object heap, then use LargeEncodedText.
-                if (encoding.GetMaxCharCountOrThrowIfHuge(stream) >= LargeObjectHeapLimitInChars)
+                if (GetMaxCharCountOrThrowIfHuge(encoding, stream) >= LargeObjectHeapLimitInChars)
                 {
                     return LargeText.Decode(stream, encoding, checksumAlgorithm, throwIfBinaryDetected, canBeEmbedded);
                 }
@@ -1260,5 +1260,21 @@ public override event EventHandler<TextChangeEventArgs> TextChanged
                 }
             }
         }
+
+        /// <summary>
+        /// Get maximum char count needed to decode the entire stream.
+        /// </summary>
+        /// <exception cref="IOException">Stream is so big that max char count can't fit in <see cref="int"/>.</exception> 
+        internal static int GetMaxCharCountOrThrowIfHuge(Encoding encoding, Stream stream)
+        {
+            Debug.Assert(stream.CanSeek);
+
+            if (encoding.TryGetMaxCharCount(stream.Length, out int maxCharCount))
+            {
+                return maxCharCount;
+            }
+
+            throw new IOException(CodeAnalysisResources.StreamIsTooLong);
+        }
     }
 }

src/Features/LanguageServer/Microsoft.CodeAnalysis.LanguageServer/HostWorkspace/LanguageServerProjectSystem.cs

@@ -220,7 +220,7 @@ private async Task<bool> LoadOrReloadProjectAsync(ProjectToLoad projectToLoad, T
 
             var loadedFile = await buildHost.LoadProjectFileAsync(projectPath, languageName, cancellationToken);
             var diagnosticLogItems = await loadedFile.GetDiagnosticLogItemsAsync(cancellationToken);
-            if (diagnosticLogItems.Any(item => item.Kind is WorkspaceDiagnosticKind.Failure))
+            if (diagnosticLogItems.Any(item => item.Kind is DiagnosticLogItemKind.Error))
             {
                 await LogDiagnosticsAsync(diagnosticLogItems);
                 // We have total failures in evaluation, no point in continuing.
@@ -292,7 +292,7 @@ private async Task<bool> LoadOrReloadProjectAsync(ProjectToLoad projectToLoad, T
         {
             // Since our LogDiagnosticsAsync helper takes DiagnosticLogItems, let's just make one for this
             var message = string.Format(LanguageServerResources.Exception_thrown_0, e);
-            var diagnosticLogItem = new DiagnosticLogItem(WorkspaceDiagnosticKind.Failure, message, projectPath);
+            var diagnosticLogItem = new DiagnosticLogItem(DiagnosticLogItemKind.Error, message, projectPath);
             await LogDiagnosticsAsync([diagnosticLogItem]);
 
             return false;
@@ -303,10 +303,10 @@ async Task LogDiagnosticsAsync(ImmutableArray<DiagnosticLogItem> diagnosticLogIt
             foreach (var logItem in diagnosticLogItems)
             {
                 var projectName = Path.GetFileName(projectPath);
-                _logger.Log(logItem.Kind is WorkspaceDiagnosticKind.Failure ? LogLevel.Error : LogLevel.Warning, $"{logItem.Kind} while loading {logItem.ProjectFilePath}: {logItem.Message}");
+                _logger.Log(logItem.Kind is DiagnosticLogItemKind.Error ? LogLevel.Error : LogLevel.Warning, $"{logItem.Kind} while loading {logItem.ProjectFilePath}: {logItem.Message}");
             }
 
-            var worstLspMessageKind = diagnosticLogItems.Any(logItem => logItem.Kind is WorkspaceDiagnosticKind.Failure) ? LSP.MessageType.Error : LSP.MessageType.Warning;
+            var worstLspMessageKind = diagnosticLogItems.Any(logItem => logItem.Kind is DiagnosticLogItemKind.Error) ? LSP.MessageType.Error : LSP.MessageType.Warning;
 
             string message;
 

src/Workspaces/Core/MSBuild.BuildHost/BuildHost.cs

@@ -2,10 +2,10 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
-extern alias workspaces;
 using System.Collections.Immutable;
-using System.IO;
+using System.Diagnostics.CodeAnalysis;
 using System.Linq;
+using System.IO;
 using System.Runtime.CompilerServices;
 using System.Threading;
 using System.Threading.Tasks;
@@ -101,11 +101,7 @@ private bool TryEnsureMSBuildLoaded(string projectOrSolutionFilePath)
         }
     }
 
-#if NET472 || NET6_0 // If we're compiling against net472 or net6.0, we get our MemberNotNull from the workspaces assembly. It has it in the net6.0 case since we're consuming the netstandard2.0 version of Workspaces.
-    [workspaces::System.Diagnostics.CodeAnalysis.MemberNotNull(nameof(_buildManager))]
-#else // If we're compiling against net7.0 or higher, then we're getting it staright from the framework.
-    [System.Diagnostics.CodeAnalysis.MemberNotNull(nameof(_buildManager))]
-#endif
+    [MemberNotNull(nameof(_buildManager))]
     [MethodImpl(MethodImplOptions.NoInlining)] // Do not inline this, since this creates MSBuild types which are being loaded by the caller
     private void CreateBuildManager()
     {

src/Workspaces/Core/MSBuild.BuildHost/MSBuild/CSharp/CSharpProjectFile.cs

@@ -16,12 +16,6 @@ public CSharpProjectFile(CSharpProjectFileLoader loader, MSB.Evaluation.Project?
         {
         }
 
-        protected override SourceCodeKind GetSourceCodeKind(string documentFileName)
-            => SourceCodeKind.Regular;
-
-        public override string GetDocumentExtension(SourceCodeKind sourceCodeKind)
-            => ".cs";
-
         protected override IEnumerable<MSB.Framework.ITaskItem> GetCompilerCommandLineArgs(MSB.Execution.ProjectInstance executedProject)
             => executedProject.GetItems(ItemNames.CscCommandLineArgs);