Real accessibility

Directory.Build.props

@@ -6,6 +6,7 @@
     <AccelerateBuildsInVisualStudio>true</AccelerateBuildsInVisualStudio>
     <FSharpNetCoreProductDefaultTargetFramework>net8.0</FSharpNetCoreProductDefaultTargetFramework>
   </PropertyGroup>
+
   <!--
    When developers load the FSharp.Compiler.Service solution we set FSHARPCORE_USE_PACKAGE to true if it hasn't already been set to a value.
    This option ensures that building and testing uses the specified FSharp.Core nuget package instead of the local FSharp.Core project.
@@ -20,6 +21,19 @@
   <PropertyGroup Condition="'$(BUILDING_USING_DOTNET)' != 'false' and '$(DotnetProjInfo)' == 'true'">
       <BUILDING_USING_DOTNET>true</BUILDING_USING_DOTNET>
   </PropertyGroup>
+
+  <PropertyGroup Condition="'$(BUILDING_USING_DOTNET)' != 'true'">
+    <!--
+         When shipping Build fsharp.compiler.service dll using realsig visibility
+         When testing we have a test pass built using old style visibility to improve
+         testing coverage.
+
+         Don't use it explicitly when building with plain .NET (without Proto or Arcade).
+     -->
+    <OtherFlags Condition="'$(Configuration)' != 'Proto' and '$(TestingLegacyInternalSignature)' != 'true'">$(OtherFlags) --realsig-</OtherFlags>
+    <OtherFlags Condition="'$(Configuration)' != 'Proto' and '$(TestingLegacyInternalSignature)' == 'true'">$(OtherFlags) --realsig+</OtherFlags>
+
+  </PropertyGroup>
 
   <Import Project="$(RepoRoot)/Directory.Build.props.user" Condition="Exists('$(RepoRoot)/Directory.Build.props.user')" />
 

FSharp.Compiler.Service.sln.DotSettings

@@ -426,7 +426,7 @@
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=mtype/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=mubinds/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=munge/@EntryIndexedValue">True</s:Boolean>
-	<s:Boolean x:Key="/Default/UserDictionary/Words/=mustinline/@EntryIndexedValue">True</s:Boolean>
+	<s:Boolean x:Key="/Default/UserDictionary/Words/=shouldinline/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=mutables/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=mval/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=mvid/@EntryIndexedValue">True</s:Boolean>

FSharpBuild.Directory.Build.props

@@ -114,7 +114,7 @@
   <!-- use this to enable good debugging in the Proto bootstrap compiler -->
   <!-- You'll have to remove it to get the actual compiler bo build because optimization is needed for some large methods -->
   <!--
-  <PropertyGroup Condition="'$(Configuration)' == 'Proto'">
+    <PropertyGroup Condition="'$(Configuration)' == 'Proto'">
     <DebugSymbols>true</DebugSymbols>
     <Optimize>false</Optimize>
     <Tailcalls>true</Tailcalls>

azure-pipelines.yml

@@ -353,6 +353,62 @@ stages:
                 ArtifactType: Container
                 parallel: true
 
+        - job: WindowsNoRealsig_testCoreclr
+          pool:
+            # The PR build definition sets this variable:
+            #   WindowsMachineQueueName=Windows.vs2022.amd64.open
+            # and there is an alternate build definition that sets this to a queue that is always scouting the
+            # next preview of Visual Studio.
+            name: $(DncEngPublicBuildPool)
+            demands: ImageOverride -equals $(WindowsMachineQueueName)
+          timeoutInMinutes: 120
+          steps:
+          - checkout: self
+            clean: true
+
+          - script: eng\CIBuild.cmd -compressallmetadata -norealsig -testCoreclr -configuration Release
+            env:
+              NativeToolsOnMachine: true
+            displayName: Build
+
+          - task: PublishBuildArtifacts@1
+            displayName: Publish Build BinLog
+            condition: always()
+            continueOnError: true
+            inputs:
+                PathToPublish: '$(Build.SourcesDirectory)\artifacts\log/Release\Build.VisualFSharp.sln.binlog'
+                ArtifactName: 'Windows Release build binlogs'
+                ArtifactType: Container
+                parallel: true
+
+        - job: WindowsNoRealsig_testDesktop
+          pool:
+            # The PR build definition sets this variable:
+            #   WindowsMachineQueueName=Windows.vs2022.amd64.open
+            # and there is an alternate build definition that sets this to a queue that is always scouting the
+            # next preview of Visual Studio.
+            name: $(DncEngPublicBuildPool)
+            demands: ImageOverride -equals $(WindowsMachineQueueName)
+          timeoutInMinutes: 120
+          steps:
+          - checkout: self
+            clean: true
+
+          - script: eng\CIBuild.cmd -compressallmetadata -norealsig -testDesktop -configuration Release
+            env:
+              NativeToolsOnMachine: true
+            displayName: Build
+
+          - task: PublishBuildArtifacts@1
+            displayName: Publish Build BinLog
+            condition: always()
+            continueOnError: true
+            inputs:
+                PathToPublish: '$(Build.SourcesDirectory)\artifacts\log/Release\Build.VisualFSharp.sln.binlog'
+                ArtifactName: 'Windows Release build binlogs'
+                ArtifactType: Container
+                parallel: true
+
         - job: WindowsStrictIndentation
           pool:
             # The PR build definition sets this variable:

docs/release-notes/.FSharp.Compiler.Service/8.0.300.md

@@ -21,6 +21,7 @@
 * Parser recovers on complex primary constructor patterns, better tree representation for primary constructor patterns. ([PR #16425](https://github.com/dotnet/fsharp/pull/16425))
 * Name resolution: keep type vars in subsequent checks ([PR #16456](https://github.com/dotnet/fsharp/pull/16456))
 * Higher-order-function-based API for working with the untyped abstract syntax tree. ([PR #16462](https://github.com/dotnet/fsharp/pull/16462))
+* Add switch to generate types and members with  IL visibility that accurately represents their F# visibility. ([PR #15484](https://github.com/dotnet/fsharp/pull/15484)
 * Allow returning bool instead of unit option for partial active patterns. ([Language suggestion #1041](https://github.com/fsharp/fslang-suggestions/issues/1041), [PR #16473](https://github.com/dotnet/fsharp/pull/16473))
 * Symbols: Add GenericArguments to FSharpEntity ([PR #16470](https://github.com/dotnet/fsharp/pull/16470))
 

docs/release-notes/.FSharp.Core/8.0.300.md

@@ -1,3 +1,6 @@
-### Fixed
+### Added
+
+* Minor tweaks to inline specifications to support Visibility PR ([PR #15484](https://github.com/dotnet/fsharp/pull/15484), [#PR 16427](https://github.com/dotnet/fsharp/pull/15484)
 
-* Preserve original stack traces in resumable state machines generated code if available. ([PR #16568](https://github.com/dotnet/fsharp/pull/16568))
+### Fixed
+* Preserve original stack traces in resumable state machines generated code if available. ([PR #16568](https://github.com/dotnet/fsharp/pull/16568))

eng/Build.ps1

@@ -69,6 +69,7 @@ param (
     [switch]$sourceBuild,
     [switch]$skipBuild,
     [switch]$compressAllMetadata,
+    [switch]$norealsig,
     [switch]$verifypackageshipstatus = $false,
     [parameter(ValueFromRemainingArguments = $true)][string[]]$properties)
 
@@ -131,7 +132,8 @@ function Print-Usage() {
     Write-Host "  -sourceBuild                  Simulate building for source-build."
     Write-Host "  -skipbuild                    Skip building product"
     Write-Host "  -compressAllMetadata          Build product with compressed metadata"
-    Write-Host "  -verifypackageshipstatus     Verify whether the packages we are building have already shipped to nuget"
+    Write-Host "  -norealsig                    Build product with realsig- (default use realsig+)"
+    Write-Host "  -verifypackageshipstatus      Verify whether the packages we are building have already shipped to nuget"
     Write-Host ""
     Write-Host "Command line arguments starting with '/p:' are passed through to MSBuild."
 }
@@ -210,6 +212,12 @@ function Process-Arguments() {
         $script:compressAllMetadata = $True;
     }
 
+    if ($norealsig) {
+        $script:realsig = $False;
+    }
+    else {
+        $script:realsig = $True;
+    }        
     if ($verifypackageshipstatus) {
         $script:verifypackageshipstatus = $True;
     }
@@ -288,6 +296,7 @@ function BuildSolution([string] $solutionName, $nopack) {
         /p:TestTargetFrameworks=$testTargetFrameworks `
         /p:DotNetBuildFromSource=$sourceBuild `
         /p:CompressAllMetadata=$CompressAllMetadata `
+        /p:TestingLegacyInternalSignature=$realsig `
         /v:$verbosity `
         $suppressExtensionDeployment `
         @properties

eng/build.sh

@@ -34,6 +34,7 @@ usage()
   echo "  --skipBuild                    Do not run the build"
   echo "  --prepareMachine               Prepare machine for CI run, clean up processes after build"
   echo "  --sourceBuild                  Simulate building for source-build"
+  echo "  --norealsig                    Build product with realsig- (default use realsig+)"
   echo "  --tfm                          Override the default target framework"
   echo ""
   echo "Command line arguments starting with '/p:' are passed through to MSBuild."
@@ -68,6 +69,7 @@ skip_analyzers=false
 skip_build=false
 prepare_machine=false
 source_build=false
+realsig=true
 properties=""
 
 docker=false
@@ -152,6 +154,9 @@ while [[ $# > 0 ]]; do
     --sourcebuild)
       source_build=true
       ;;
+    --norealsig)
+      realsig=false
+      ;;
     --tfm)
       tfm=$2
       shift
@@ -308,6 +313,7 @@ function BuildSolution {
       /p:QuietRestore=$quiet_restore \
       /p:QuietRestoreBinaryLog="$binary_log" \
       /p:ArcadeBuildFromSource=$source_build \
+      /p:TestingLegacyInternalSignature=$realsig \
       $properties
   fi
 }

src/Compiler/Checking/CheckComputationExpressions.fs

@@ -1838,7 +1838,7 @@ let TcComputationExpression (cenv: cenv) env (overallTy: OverallTy) tpenv (mWhol
                     addVarsToVarSpace varSpace (fun mQueryOp env ->
                         // Normalize the bindings before detecting the bound variables
                         match (List.map (BindingNormalization.NormalizeBinding ValOrMemberBinding cenv env) binds) with
-                        | [ NormalizedBinding(kind = SynBindingKind.Normal; mustInline = false; isMutable = false; pat = pat) ] ->
+                        | [ NormalizedBinding(kind = SynBindingKind.Normal; shouldInline = false; isMutable = false; pat = pat) ] ->
                             // successful case
                             use _holder = TemporarilySuspendReportingTypecheckResultsToSink cenv.tcSink