Disable partial type checking when getting full results for a file or project

src/fsharp/service/IncrementalBuild.fs

@@ -1516,6 +1516,14 @@ type PartialCheckResults private (semanticModel: SemanticModel, timeStamp: DateT
 
     member _.TcInfoWithOptional ctok = semanticModel.TcInfoWithOptional |> eval ctok
 
+    member _.TryGetItemKeyStore ctok =
+        let _, info = semanticModel.TcInfoWithOptional |> eval ctok
+        info.itemKeyStore
+
+    member _.GetSemanticClassification ctok =
+        let _, info = semanticModel.TcInfoWithOptional |> eval ctok
+        info.semanticClassification
+
     static member Create (semanticModel: SemanticModel, timestamp) = 
         PartialCheckResults(semanticModel, timestamp)
 
@@ -1578,6 +1586,8 @@ type IncrementalBuilder(tcGlobals, frameworkTcImports, nonFrameworkAssemblyInput
     let importsInvalidatedByTypeProvider = new Event<string>()
 #endif
     let mutable currentTcImportsOpt = None
+    let defaultPartialTypeChecking = enablePartialTypeChecking
+    let mutable enablePartialTypeChecking = enablePartialTypeChecking
 
     // Check for the existence of loaded sources and prepend them to the sources list if present.
     let sourceFiles = tcConfig.GetAvailableLoadedSources() @ (sourceFiles |>List.map (fun s -> rangeStartup, s))
@@ -1718,7 +1728,7 @@ type IncrementalBuilder(tcGlobals, frameworkTcImports, nonFrameworkAssemblyInput
                 maxTimeShareMilliseconds, 
                 keepAllBackgroundSymbolUses, 
                 enableBackgroundItemKeyStoreAndSemanticClassification,
-                enablePartialTypeChecking,
+                defaultPartialTypeChecking,
                 beforeFileChecked, fileChecked, tcInfo, Eventually.Done (Some tcInfoOptional), None) }
 
     /// This is a build task function that gets placed into the build rules as the computation for a Vector.ScanLeft
@@ -1944,6 +1954,17 @@ type IncrementalBuilder(tcGlobals, frameworkTcImports, nonFrameworkAssemblyInput
         let slotOfFile = builder.GetSlotOfFileName filename + 1
         builder.GetCheckResultsBeforeSlotInProject (ctok, slotOfFile)
 
+    member builder.GetFullCheckResultsAfterFileInProject (ctok: CompilationThreadToken, filename) = 
+        enablePartialTypeChecking <- false
+        cancellable {
+            try
+                let! result = builder.GetCheckResultsAfterFileInProject(ctok, filename)
+                result.TcInfoWithOptional ctok |> ignore // Make sure we forcefully evaluate the info
+                return result
+            finally               
+                enablePartialTypeChecking <- defaultPartialTypeChecking
+        }
+
     member builder.GetCheckResultsAfterLastFileInProject (ctok: CompilationThreadToken) = 
         builder.GetCheckResultsBeforeSlotInProject(ctok, builder.GetSlotsCount()) 
 
@@ -1965,6 +1986,18 @@ type IncrementalBuilder(tcGlobals, frameworkTcImports, nonFrameworkAssemblyInput
             let msg = sprintf "Build was not evaluated, expected the results to be ready after 'Eval' (GetCheckResultsAndImplementationsForProject, data = %A)." data
             return! failwith  msg
       }
+
+    member this.GetFullCheckResultsAndImplementationsForProject(ctok: CompilationThreadToken) = 
+        enablePartialTypeChecking <- false
+        cancellable {
+            try
+                let! result = this.GetCheckResultsAndImplementationsForProject(ctok)
+                let results, _, _, _ = result
+                results.TcInfoWithOptional ctok |> ignore // Make sure we forcefully evaluate the info
+                return result
+            finally
+                enablePartialTypeChecking <- defaultPartialTypeChecking
+        }
 
     member __.GetLogicalTimeStampForProject(cache, ctok: CompilationThreadToken) = 
         let t1 = MaxTimeStampInDependencies cache ctok stampedFileNamesNode 

src/fsharp/service/IncrementalBuild.fsi

@@ -110,6 +110,14 @@ type internal PartialCheckResults =
     /// Only use when it's absolutely necessary to get rich information on a file.
     member TcInfoWithOptional: CompilationThreadToken -> TcInfo * TcInfoOptional
 
+    /// Can cause a second type-check if `enablePartialTypeChecking` is true in the checker.
+    /// Only use when it's absolutely necessary to get rich information on a file.
+    member TryGetItemKeyStore: CompilationThreadToken -> ItemKeyStore option
+
+    /// Can cause a second type-check if `enablePartialTypeChecking` is true in the checker.
+    /// Only use when it's absolutely necessary to get rich information on a file.
+    member GetSemanticClassification: CompilationThreadToken -> struct(range * SemanticClassificationType) []
+
     member TimeStamp: DateTime 
 
 /// Manages an incremental build graph for the build of an F# project
@@ -177,6 +185,13 @@ type internal IncrementalBuilder =
       // TODO: make this an Eventually (which can be scheduled) or an Async (which can be cancelled)
       member GetCheckResultsAfterFileInProject : CompilationThreadToken * filename:string -> Cancellable<PartialCheckResults>
 
+      /// Get the typecheck state after checking a file. Compute the entire type check of the project up
+      /// to the necessary point if the result is not available. This may be a long-running operation.
+      /// This will get full type-check info for the file, meaning no partial type-checking.
+      ///
+      // TODO: make this an Eventually (which can be scheduled) or an Async (which can be cancelled)
+      member GetFullCheckResultsAfterFileInProject : CompilationThreadToken * filename:string -> Cancellable<PartialCheckResults>
+
       /// Get the typecheck result after the end of the last file. The typecheck of the project is not 'completed'.
       /// This may be a long-running operation.
       ///
@@ -189,6 +204,13 @@ type internal IncrementalBuilder =
       // TODO: make this an Eventually (which can be scheduled) or an Async (which can be cancelled)
       member GetCheckResultsAndImplementationsForProject : CompilationThreadToken -> Cancellable<PartialCheckResults * IL.ILAssemblyRef * IRawFSharpAssemblyData option * TypedImplFile list option>
 
+      /// Get the final typecheck result. If 'generateTypedImplFiles' was set on Create then the TypedAssemblyAfterOptimization will contain implementations.
+      /// This may be a long-running operation.
+      /// This will get full type-check info for the project, meaning no partial type-checking.
+      ///
+      // TODO: make this an Eventually (which can be scheduled) or an Async (which can be cancelled)
+      member GetFullCheckResultsAndImplementationsForProject : CompilationThreadToken -> Cancellable<PartialCheckResults * IL.ILAssemblyRef * IRawFSharpAssemblyData option * TypedImplFile list option>
+
       /// Get the logical time stamp that is associated with the output of the project if it were gully built immediately
       member GetLogicalTimeStampForProject: TimeStampCache * CompilationThreadToken -> DateTime
 

src/fsharp/service/service.fs

@@ -722,7 +722,7 @@ type BackgroundCompiler(legacyReferenceResolver, projectCacheSize, keepAssemblyC
                 return (parseResults, typedResults)
             | Some builder -> 
                 let! (parseTreeOpt, _, _, untypedErrors) = builder.GetParseResultsForFile (ctok, filename)
-                let! tcProj = builder.GetCheckResultsAfterFileInProject (ctok, filename)
+                let! tcProj = builder.GetFullCheckResultsAfterFileInProject (ctok, filename)
 
                 let tcInfo, tcInfoOptional = tcProj.TcInfoWithOptional ctok
 
@@ -775,9 +775,8 @@ type BackgroundCompiler(legacyReferenceResolver, projectCacheSize, keepAssemblyC
             | None -> return Seq.empty
             | Some builder -> 
                 if builder.ContainsFile filename then
-                    let! checkResults = builder.GetCheckResultsAfterFileInProject (ctok, filename)
-                    let _, tcInfoOptional = checkResults.TcInfoWithOptional ctok
-                    match tcInfoOptional.itemKeyStore with
+                    let! checkResults = builder.GetFullCheckResultsAfterFileInProject (ctok, filename)
+                    match checkResults.TryGetItemKeyStore ctok with
                     | None -> return Seq.empty
                     | Some reader -> return reader.FindAll symbol.Item
                 else
@@ -791,9 +790,8 @@ type BackgroundCompiler(legacyReferenceResolver, projectCacheSize, keepAssemblyC
                 match builderOpt with
                 | None -> return [||]
                 | Some builder -> 
-                    let! checkResults = builder.GetCheckResultsAfterFileInProject (ctok, filename)
-                    let _, tcInfoOptional = checkResults.TcInfoWithOptional ctok
-                    return tcInfoOptional.semanticClassification })
+                    let! checkResults = builder.GetFullCheckResultsAfterFileInProject (ctok, filename)
+                    return checkResults.GetSemanticClassification ctok })
 
     /// Try to get recent approximate type check results for a file. 
     member __.TryGetRecentCheckResultsForFile(filename: string, options:FSharpProjectOptions, sourceText: ISourceText option, _userOpName: string) =
@@ -813,7 +811,7 @@ type BackgroundCompiler(legacyReferenceResolver, projectCacheSize, keepAssemblyC
           | None -> 
               return FSharpCheckProjectResults (options.ProjectFileName, None, keepAssemblyContents, creationErrors, None)
           | Some builder -> 
-              let! (tcProj, ilAssemRef, tcAssemblyDataOpt, tcAssemblyExprOpt) = builder.GetCheckResultsAndImplementationsForProject(ctok)
+              let! (tcProj, ilAssemRef, tcAssemblyDataOpt, tcAssemblyExprOpt) = builder.GetFullCheckResultsAndImplementationsForProject(ctok)
               let errorOptions = tcProj.TcConfig.errorSeverityOptions
               let fileName = TcGlobals.DummyFileNameForRangesWithoutASpecificLocation