Add FSharpWorkspace to FCS (dotnet#18032)

.fantomasignore

@@ -109,6 +109,7 @@ src/Compiler/Utilities/illib.fs
 
 
 src/Compiler/Utilities/NullnessShims.fs
+src/Compiler/Utilities/DependencyGraph.fs
 src/Compiler/Utilities/LruCache.fsi
 src/Compiler/Utilities/LruCache.fs
 src/Compiler/Utilities/HashMultiMap.fsi

src/Compiler/FSharp.Compiler.Service.fsproj

@@ -1,4 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?>
 <!-- Copyright (c) Microsoft Corporation.  All Rights Reserved.  See License.txt in the project root for license information. -->
 <Project Sdk="Microsoft.NET.Sdk">
 
@@ -16,7 +16,7 @@
     <AllowCrossTargeting>true</AllowCrossTargeting>
     <DefineConstants>$(DefineConstants);COMPILER</DefineConstants>
     <CheckNulls>true</CheckNulls>
-	<!-- Nullness checking against ns20 base class libraries is very weak, the APIs were not updated with annotations. 
+	<!-- Nullness checking against ns20 base class libraries is very weak, the APIs were not updated with annotations.
 	     Therefore we want to use the latest BCL APIs from NetCurrent.
 		 We are still not building the actual product in NetCurrent, so for official builds we remain as ns2.0.
 		 For 'BUILDING_USING_DOTNET' builds, we still want latest BCL annotations, so that contributors can get related warnings locally.
@@ -113,7 +113,7 @@
     <EmbeddedResource Include="FSStrings.resx">
       <Link>FSStrings.resx</Link>
       <LogicalName>FSStrings.resources</LogicalName>
-    </EmbeddedResource>    
+    </EmbeddedResource>
     <Compile Include="Utilities\Activity.fsi" />
     <Compile Include="Utilities\Activity.fs" />
     <Compile Include="Utilities\illib.fsi" />
@@ -148,6 +148,7 @@
     <Compile Include="Utilities\QueueList.fs" />
     <Compile Include="Utilities\lib.fsi" />
     <Compile Include="Utilities\lib.fs" />
+    <Compile Include="Utilities\DependencyGraph.fs" />
     <Compile Include="Utilities\LruCache.fsi" />
     <Compile Include="Utilities\LruCache.fs" />
     <Compile Include="Utilities\ImmutableArray.fsi" />
@@ -541,6 +542,9 @@
     <Compile Include="Service\TransparentCompiler.fs" />
     <Compile Include="Service\service.fsi" />
     <Compile Include="Service\service.fs" />
+    <Compile Include="Service\FSharpWorkspaceState.fs" />
+    <Compile Include="Service\FSharpWorkspaceQuery.fs" />
+    <Compile Include="Service\FSharpWorkspace.fs" />
     <Compile Include="Service\ServiceInterfaceStubGenerator.fsi" />
     <Compile Include="Service\ServiceInterfaceStubGenerator.fs" />
     <Compile Include="Service\ServiceStructure.fsi" />

src/Compiler/Facilities/AsyncMemoize.fs

@@ -131,6 +131,7 @@ type internal JobEvent =
     static member AllEvents = [Requested; Started; Restarted; Finished; Canceled; Evicted; Collected; Weakened; Strengthened; Failed; Cleared]
 
 type internal ICacheKey<'TKey, 'TVersion> =
+    // TODO Key should probably be renamed to Identifier
     abstract member GetKey: unit -> 'TKey
     abstract member GetVersion: unit -> 'TVersion
     abstract member GetLabel: unit -> string