// Copyright (c) Microsoft Corporation. All Rights Reserved. See License.txt in the project root for license information.

/// The configuration of the compiler (TcConfig and TcConfigBuilder)
module internal FSharp.Compiler.CompilerConfig

open System
open System.Collections.Concurrent
open System.Runtime.InteropServices
open System.IO
open FSharp.Compiler.Optimizer
open Internal.Utilities
#if !FABLE_COMPILER
open Internal.Utilities.FSharpEnvironment
#endif
open Internal.Utilities.Library
open Internal.Utilities.Library.Extras
open FSharp.Compiler
open FSharp.Compiler.AbstractIL.IL
open FSharp.Compiler.AbstractIL.ILBinaryReader
#if !FABLE_COMPILER
open FSharp.Compiler.AbstractIL.ILPdbWriter
open FSharp.Compiler.DependencyManager
#endif
open FSharp.Compiler.Diagnostics
open FSharp.Compiler.DiagnosticsLogger
open FSharp.Compiler.Features
open FSharp.Compiler.IO
open FSharp.Compiler.CodeAnalysis
open FSharp.Compiler.Text
open FSharp.Compiler.Text.Range
open FSharp.Compiler.Xml
open FSharp.Compiler.TypedTree
open FSharp.Compiler.BuildGraph

#if !NO_TYPEPROVIDERS
open FSharp.Core.CompilerServices
#endif

let (++) x s = x @ [ s ]

//----------------------------------------------------------------------------
// Some Globals
//--------------------------------------------------------------------------

let FSharpSigFileSuffixes = [ ".mli"; ".fsi" ]

let FSharpMLCompatFileSuffixes = [ ".mli"; ".ml" ]

let FSharpImplFileSuffixes = [ ".ml"; ".fs"; ".fsscript"; ".fsx" ]

let FSharpScriptFileSuffixes = [ ".fsscript"; ".fsx" ]

let FSharpIndentationAwareSyntaxFileSuffixes =
    [ ".fs"; ".fsscript"; ".fsx"; ".fsi" ]

let FSharpExperimentalFeaturesEnabledAutomatically =
    String.IsNullOrWhiteSpace(Environment.GetEnvironmentVariable("FSHARP_EXPERIMENTAL_FEATURES"))
    |> not

//--------------------------------------------------------------------------
// General file name resolver
//--------------------------------------------------------------------------

exception FileNameNotResolved of searchedLocations: string * fileName: string * range: range

exception LoadedSourceNotFoundIgnoring of fileName: string * range: range

#if FABLE_COMPILER
type HashAlgorithm =
    | Sha1
    | Sha256
#endif

#if !FABLE_COMPILER

/// Will return None if the fileName is not found.
let TryResolveFileUsingPaths (paths, m, fileName) =
    let () =
        try
            FileSystem.IsPathRootedShim fileName |> ignore
        with :? ArgumentException as e ->
            error (Error(FSComp.SR.buildProblemWithFilename (fileName, e.Message), m))

    if FileSystem.IsPathRootedShim fileName then
        if FileSystem.FileExistsShim fileName then
            Some fileName
        else
            None
    else
        let res =
            paths
            |> Seq.tryPick (fun path ->
                let n = Path.Combine(path, fileName)
                if FileSystem.FileExistsShim n then Some n else None)

        res

/// Will raise FileNameNotResolved if the fileName was not found
let ResolveFileUsingPaths (paths, m, fileName) =
    match TryResolveFileUsingPaths(paths, m, fileName) with
    | Some res -> res
    | None ->
        let searchMessage = String.concat "\n " paths
        raise (FileNameNotResolved(fileName, searchMessage, m))

#endif //!FABLE_COMPILER

let GetWarningNumber (m, warningNumber: string) =
    try
        // Okay so ...
        //      #pragma strips FS of the #pragma "FS0004" and validates the warning number
        //      therefore if we have warning id that starts with a numeric digit we convert it to Some (int32)
        //      anything else is ignored None
        if Char.IsDigit(warningNumber[0]) then
            Some(int32 warningNumber)
        elif warningNumber.StartsWithOrdinal "FS" then
            raise (ArgumentException())
        else
            None
    with _ ->
        warning (Error(FSComp.SR.buildInvalidWarningNumber warningNumber, m))
        None

let ComputeMakePathAbsolute implicitIncludeDir (path: string) =
    try
        // remove any quotation marks from the path first
        let path = path.Replace("\"", "")

        if not (FileSystem.IsPathRootedShim path) then
            Path.Combine(implicitIncludeDir, path)
        else
            path
    with :? ArgumentException ->
        path

//----------------------------------------------------------------------------
// Configuration
//----------------------------------------------------------------------------

[<RequireQualifiedAccess>]
type CompilerTarget =
    | WinExe
    | ConsoleExe
    | Dll
    | Module

    member x.IsExe =
        (match x with
         | ConsoleExe
         | WinExe -> true
         | _ -> false)

[<RequireQualifiedAccess>]
type ResolveAssemblyReferenceMode =
    | Speculative
    | ReportErrors

[<RequireQualifiedAccess>]
type CopyFSharpCoreFlag =
    | Yes
    | No

/// Represents the file or string used for the --version flag
type VersionFlag =
    | VersionString of string
    | VersionFile of string
    | VersionNone

    member x.GetVersionInfo implicitIncludeDir =
        let vstr = x.GetVersionString implicitIncludeDir

        try
            parseILVersion vstr
        with _ ->
            errorR (Error(FSComp.SR.buildInvalidVersionString vstr, rangeStartup))
            parseILVersion "0.0.0.0"

    member x.GetVersionString implicitIncludeDir =
#if FABLE_COMPILER
        ignore<string> implicitIncludeDir
        "0.0.0.0"
#else
        match x with
        | VersionString s -> s
        | VersionFile s ->
            let s =
                if FileSystem.IsPathRootedShim s then
                    s
                else
                    Path.Combine(implicitIncludeDir, s)

            if not (FileSystem.FileExistsShim s) then
                errorR (Error(FSComp.SR.buildInvalidVersionFile s, rangeStartup))
                "0.0.0.0"
            else
                use fs = FileSystem.OpenFileForReadShim(s)
                use is = new StreamReader(fs)
                is.ReadLine()
        | VersionNone -> "0.0.0.0"
#endif //!FABLE_COMPILER

/// Represents a reference to an assembly. May be backed by a real assembly on disk, or a cross-project
/// reference backed by information generated by the the compiler service.
type IRawFSharpAssemblyData =
    ///  The raw list AutoOpenAttribute attributes in the assembly
    abstract GetAutoOpenAttributes: unit -> string list

    ///  The raw list InternalsVisibleToAttribute attributes in the assembly
    abstract GetInternalsVisibleToAttributes: unit -> string list

    ///  The raw IL module definition in the assembly, if any. This is not present for cross-project references
    /// in the language service
    abstract TryGetILModuleDef: unit -> ILModuleDef option

    ///  The raw F# signature data in the assembly, if any
    abstract GetRawFSharpSignatureData: range * ilShortAssemName: string * fileName: string -> (string * (unit -> ReadOnlyByteMemory)) list

    ///  The raw F# optimization data in the assembly, if any
    abstract GetRawFSharpOptimizationData:
        range * ilShortAssemName: string * fileName: string -> (string * (unit -> ReadOnlyByteMemory)) list

    ///  The table of type forwarders in the assembly
    abstract GetRawTypeForwarders: unit -> ILExportedTypesAndForwarders

    /// The identity of the module
    abstract ILScopeRef: ILScopeRef

    abstract ILAssemblyRefs: ILAssemblyRef list

    abstract ShortAssemblyName: string

    /// Indicates if the assembly has any F# signature data attribute
    abstract HasAnyFSharpSignatureDataAttribute: bool

    /// Indicates if the assembly has an F# signature data attribute auitable for use with this version of F# tooling
    abstract HasMatchingFSharpSignatureDataAttribute: bool

/// Cache of time stamps as we traverse a project description
type TimeStampCache(defaultTimeStamp: DateTime) =
    let files = ConcurrentDictionary<string, DateTime>()

    let projects =
        ConcurrentDictionary<IProjectReference, DateTime>(HashIdentity.Reference)

    member _.GetFileTimeStamp fileName =
        let ok, v = files.TryGetValue fileName

        if ok then
            v
        else
#if FABLE_COMPILER
            let v = defaultTimeStamp
#else
            let v = FileSystem.GetLastWriteTimeShim fileName
#endif
            files[fileName] <- v
            v

    member cache.GetProjectReferenceTimeStamp(projectReference: IProjectReference) =
        let ok, v = projects.TryGetValue projectReference

        if ok then
            v
        else
            let v = defaultArg (projectReference.TryGetLogicalTimeStamp cache) defaultTimeStamp
            projects[projectReference] <- v
            v

and [<RequireQualifiedAccess>] ProjectAssemblyDataResult =
    | Available of IRawFSharpAssemblyData
    | Unavailable of useOnDiskInstead: bool

and IProjectReference =
    /// The name of the assembly file generated by the project
    abstract FileName: string

    /// Evaluate raw contents of the assembly file generated by the project
    abstract EvaluateRawContents: unit -> NodeCode<ProjectAssemblyDataResult>

    /// Get the logical timestamp that would be the timestamp of the assembly file generated by the project
    ///
    /// For project references this is maximum of the timestamps of all dependent files.
    /// The project is not actually built, nor are any assemblies read, but the timestamps for each dependent file
    /// are read via the FileSystem. If the files don't exist, then a default timestamp is used.
    ///
    /// The operation returns None only if it is not possible to create an IncrementalBuilder for the project at all, e.g. if there
    /// are fatal errors in the options for the project.
    abstract TryGetLogicalTimeStamp: cache: TimeStampCache -> DateTime option

type AssemblyReference =
    | AssemblyReference of range: range * text: string * projectReference: IProjectReference option

    member x.Range = (let (AssemblyReference(m, _, _)) = x in m)

    member x.Text = (let (AssemblyReference(_, text, _)) = x in text)

    member x.ProjectReference = (let (AssemblyReference(_, _, contents)) = x in contents)

    member x.SimpleAssemblyNameIs name =
        (String.Compare(FileSystemUtils.fileNameWithoutExtensionWithValidate false x.Text, name, StringComparison.OrdinalIgnoreCase) = 0)
        || not (x.Text.Contains "/")
           && not (x.Text.Contains "\\")
           && not (x.Text.EndsWith(".dll", StringComparison.InvariantCultureIgnoreCase))
           && not (x.Text.EndsWith(".exe", StringComparison.InvariantCultureIgnoreCase))
           && (try
                   let aname = System.Reflection.AssemblyName x.Text in aname.Name = name
               with _ ->
                   false)

    override x.ToString() = sprintf "AssemblyReference(%s)" x.Text

type UnresolvedAssemblyReference = UnresolvedAssemblyReference of string * AssemblyReference list
#if !NO_TYPEPROVIDERS
type ResolvedExtensionReference = ResolvedExtensionReference of string * AssemblyReference list * Tainted<ITypeProvider> list
#endif

type ImportedAssembly =
    {
        ILScopeRef: ILScopeRef
        FSharpViewOfMetadata: CcuThunk
        AssemblyAutoOpenAttributes: string list
        AssemblyInternalsVisibleToAttributes: string list
#if !NO_TYPEPROVIDERS
        IsProviderGenerated: bool
        mutable TypeProviders: Tainted<ITypeProvider> list
#endif
        FSharpOptimizationData: Microsoft.FSharp.Control.Lazy<Optimizer.LazyModuleInfo option>
    }

type AvailableImportedAssembly =
    | ResolvedImportedAssembly of ImportedAssembly
    | UnresolvedImportedAssembly of string

type CcuLoadFailureAction =
    | RaiseError
    | ReturnNone

type Directive =
    | Resolution
    | Include

type LStatus =
    | Unprocessed
    | Processed

type TokenizeOption =
    | AndCompile
    | Only
    | Debug
    | Unfiltered

type PackageManagerLine =
    {
        Directive: Directive
        LineStatus: LStatus
        Line: string
        Range: range
    }

    static member AddLineWithKey
        (packageKey: string)
        (directive: Directive)
        (line: string)
        (m: range)
        (packageManagerLines: Map<string, PackageManagerLine list>)
        : Map<string, PackageManagerLine list> =
        let path = PackageManagerLine.StripDependencyManagerKey packageKey line

        let newLine =
            {
                Directive = directive
                LineStatus = LStatus.Unprocessed
                Line = path
                Range = m
            }

        let oldLines = MultiMap.find packageKey packageManagerLines
        let newLines = oldLines @ [ newLine ]
        packageManagerLines.Add(packageKey, newLines)

    static member RemoveUnprocessedLines
        (packageKey: string)
        (packageManagerLines: Map<string, PackageManagerLine list>)
        : Map<string, PackageManagerLine list> =
        let oldLines = MultiMap.find packageKey packageManagerLines

        let newLines =
            oldLines |> List.filter (fun line -> line.LineStatus = LStatus.Processed)

        packageManagerLines.Add(packageKey, newLines)

    static member SetLinesAsProcessed
        (packageKey: string)
        (packageManagerLines: Map<string, PackageManagerLine list>)
        : Map<string, PackageManagerLine list> =
        let oldLines = MultiMap.find packageKey packageManagerLines

        let newLines =
            oldLines
            |> List.map (fun line ->
                { line with
                    LineStatus = LStatus.Processed
                })

        packageManagerLines.Add(packageKey, newLines)

    static member StripDependencyManagerKey (packageKey: string) (line: string) : string =
        line.Substring(packageKey.Length + 1).Trim()

[<RequireQualifiedAccess>]
type MetadataAssemblyGeneration =
    | None
    | ReferenceOut of outputPath: string
    | ReferenceOnly

[<RequireQualifiedAccess>]
type ParallelReferenceResolution =
    | On
    | Off

[<RequireQualifiedAccess>]
type TypeCheckingMode =
    | Sequential
    | Graph

[<RequireQualifiedAccess>]
type TypeCheckingConfig =
    {
        Mode: TypeCheckingMode
        DumpGraph: bool
    }

[<NoEquality; NoComparison>]
type TcConfigBuilder =
    {
        mutable primaryAssembly: PrimaryAssembly
        mutable noFeedback: bool
        mutable stackReserveSize: int32 option
        mutable implicitIncludeDir: string (* normally "." *)
        mutable openDebugInformationForLaterStaticLinking: bool (* only for --standalone *)
        defaultFSharpBinariesDir: string
        mutable compilingFSharpCore: bool
        mutable useIncrementalBuilder: bool
        mutable includes: string list
        mutable implicitOpens: string list
        mutable useFsiAuxLib: bool
        mutable implicitlyReferenceDotNetAssemblies: bool
        mutable resolutionEnvironment: LegacyResolutionEnvironment
        mutable implicitlyResolveAssemblies: bool
        mutable indentationAwareSyntax: bool option
        mutable conditionalDefines: string list
        mutable loadedSources: (range * string * string) list
        mutable compilerToolPaths: string list
        mutable referencedDLLs: AssemblyReference list
        mutable packageManagerLines: Map<string, PackageManagerLine list>
        mutable projectReferences: IProjectReference list
        mutable knownUnresolvedReferences: UnresolvedAssemblyReference list
        reduceMemoryUsage: ReduceMemoryFlag
        mutable subsystemVersion: int * int
        mutable useHighEntropyVA: bool
        mutable inputCodePage: int option
        mutable clearResultsCache: bool
        mutable embedResources: string list
        mutable diagnosticsOptions: FSharpDiagnosticOptions
        mutable mlCompatibility: bool
        mutable checkOverflow: bool
        mutable showReferenceResolutions: bool
        mutable outputDir: string option
        mutable outputFile: string option
        mutable platform: ILPlatform option
        mutable prefer32Bit: bool
        mutable useSimpleResolution: bool
        mutable target: CompilerTarget
        mutable debuginfo: bool
        mutable testFlagEmitFeeFeeAs100001: bool
        mutable dumpDebugInfo: bool
        mutable debugSymbolFile: string option
        (* Backend configuration *)
        mutable typeCheckOnly: bool
        mutable parseOnly: bool
        mutable importAllReferencesOnly: bool
        mutable simulateException: string option
        mutable printAst: bool
        mutable tokenize: TokenizeOption
        mutable testInteractionParser: bool
        mutable reportNumDecls: bool
        mutable printSignature: bool
        mutable printSignatureFile: string
        mutable printAllSignatureFiles: bool
        mutable xmlDocOutputFile: string option
        mutable stats: bool
        mutable generateFilterBlocks: bool (* don't generate filter blocks due to bugs on Mono *)

        mutable signer: string option
        mutable container: string option

        mutable delaysign: bool
        mutable publicsign: bool
        mutable version: VersionFlag
        mutable metadataVersion: string option
        mutable standalone: bool
        mutable extraStaticLinkRoots: string list
        mutable compressMetadata: bool
        mutable noSignatureData: bool
        mutable onlyEssentialOptimizationData: bool
        mutable useOptimizationDataFile: bool
        mutable jitTracking: bool
        mutable portablePDB: bool
        mutable embeddedPDB: bool
        mutable embedAllSource: bool
        mutable embedSourceList: string list
        mutable sourceLink: string

        mutable internConstantStrings: bool
        mutable extraOptimizationIterations: int

        mutable win32icon: string
        mutable win32res: string
        mutable win32manifest: string
        mutable includewin32manifest: bool
        mutable linkResources: string list

        mutable legacyReferenceResolver: LegacyReferenceResolver

        mutable showFullPaths: bool
        mutable diagnosticStyle: DiagnosticStyle
        mutable utf8output: bool
        mutable flatErrors: bool

        mutable maxErrors: int
        mutable abortOnError: bool (* intended for fsi scripts that should exit on first error *)
        mutable baseAddress: int32 option
        mutable checksumAlgorithm: HashAlgorithm
#if DEBUG
        mutable showOptimizationData: bool
#endif
        mutable showTerms: bool (* show terms between passes? *)
        mutable writeTermsToFiles: bool (* show terms to files? *)
        mutable doDetuple: bool (* run detuple pass? *)
        mutable doTLR: bool (* run TLR pass? *)
        mutable doFinalSimplify: bool (* do final simplification pass *)
        mutable optsOn: bool (* optimizations are turned on *)
        mutable optSettings: Optimizer.OptimizationSettings
        mutable emitTailcalls: bool
        mutable deterministic: bool
        mutable concurrentBuild: bool
        mutable parallelIlxGen: bool
        mutable emitMetadataAssembly: MetadataAssemblyGeneration
        mutable preferredUiLang: string option
        mutable lcid: int option
        mutable productNameForBannerText: string
        /// show the MS (c) notice, e.g. with help or fsi?
        mutable showBanner: bool

        /// show times between passes?
        mutable showTimes: bool
        mutable writeTimesToFile: string option
        mutable showLoadedAssemblies: bool
        mutable continueAfterParseFailure: bool

#if !NO_TYPEPROVIDERS
        /// show messages about extension type resolution?
        mutable showExtensionTypeMessages: bool
#endif

        /// Pause between passes?
        mutable pause: bool

        /// Whenever possible, emit callvirt instead of call
        mutable alwaysCallVirt: bool

        /// If true, strip away data that would not be of use to end users, but is useful to us for debugging
        mutable noDebugAttributes: bool

        /// If true, do not emit ToString implementations for unions, records, structs, exceptions
        mutable useReflectionFreeCodeGen: bool

        /// If true, indicates all type checking and code generation is in the context of fsi.exe
        isInteractive: bool

        isInvalidationSupported: bool

        /// If true - every expression in quotations will be augmented with full debug info (fileName, location in file)
        mutable emitDebugInfoInQuotations: bool

        mutable strictIndentation: bool option

        mutable exename: string option

        // If true - the compiler will copy FSharp.Core.dll along the produced binaries
        mutable copyFSharpCore: CopyFSharpCoreFlag

        /// When false FSI will lock referenced assemblies requiring process restart, false = disable Shadow Copy false, the default
        mutable shadowCopyReferences: bool

        mutable useSdkRefs: bool

        mutable fxResolver: FxResolver option

        mutable bufferWidth: int option

        // Is F# Interactive using multi-assembly emit?
        mutable fsiMultiAssemblyEmit: bool

        /// specify the error range for FxResolver
        rangeForErrors: range

        /// Override the SDK directory used by FxResolver, used for FCS only
        sdkDirOverride: string option

        /// A function to call to try to get an object that acts as a snapshot of the metadata section of a .NET binary,
        /// and from which we can read the metadata. Only used when metadataOnly=true.
        mutable tryGetMetadataSnapshot: ILReaderTryGetMetadataSnapshot

        mutable internalTestSpanStackReferring: bool

        mutable noConditionalErasure: bool

        mutable applyLineDirectives: bool

        mutable pathMap: PathMap

        mutable langVersion: LanguageVersion

        mutable xmlDocInfoLoader: IXmlDocumentationInfoLoader option

        mutable exiter: Exiter

        mutable parallelReferenceResolution: ParallelReferenceResolution

        mutable captureIdentifiersWhenParsing: bool

        mutable typeCheckingConfig: TypeCheckingConfig

        mutable dumpSignatureData: bool
    }

    // Directories to start probing in
    // Algorithm:
    //  Search for native libraries using:
    //  1. Include directories
    //  2. compilerToolPath directories
    //  3. reference dll's
    //  4. The implicit include directory
    //
    // NOTE: it is important this is a delayed IEnumerable sequence. It is recomputed
    // each time a resolution happens and additional paths may be added as a result.
    member tcConfigB.GetNativeProbingRoots() =
        seq {
            yield! tcConfigB.includes
            yield! tcConfigB.compilerToolPaths
            yield! (tcConfigB.referencedDLLs |> Seq.map (fun ref -> Path.GetDirectoryName(ref.Text)))
            tcConfigB.implicitIncludeDir
        }
        |> Seq.distinct

    static member CreateNew
        (
            legacyReferenceResolver,
            defaultFSharpBinariesDir,
            reduceMemoryUsage,
            implicitIncludeDir,
            isInteractive,
            isInvalidationSupported,
            defaultCopyFSharpCore,
            tryGetMetadataSnapshot,
            sdkDirOverride,
            rangeForErrors
        ) =

        if (String.IsNullOrEmpty defaultFSharpBinariesDir) then
            failwith "Expected a valid defaultFSharpBinariesDir"

        // These are all default values, many can be overridden using the command line switch
        {
            primaryAssembly = PrimaryAssembly.Mscorlib
            indentationAwareSyntax = None
            noFeedback = false
            stackReserveSize = None
            conditionalDefines = []
            openDebugInformationForLaterStaticLinking = false
            compilingFSharpCore = false
            useIncrementalBuilder = false
            implicitOpens = []
            includes = []
            resolutionEnvironment = LegacyResolutionEnvironment.EditingOrCompilation false
            implicitlyReferenceDotNetAssemblies = true
            implicitlyResolveAssemblies = true
            compilerToolPaths = []
            referencedDLLs = []
            packageManagerLines = Map.empty
            projectReferences = []
            knownUnresolvedReferences = []
            loadedSources = []
            diagnosticsOptions = FSharpDiagnosticOptions.Default
            embedResources = []
            inputCodePage = None
            clearResultsCache = false
            subsystemVersion = 4, 0 // per spec for 357994
            useHighEntropyVA = false
            mlCompatibility = false
            checkOverflow = false
            showReferenceResolutions = false
            outputDir = None
            outputFile = None
            platform = None
            prefer32Bit = false
            useSimpleResolution = false
            target = CompilerTarget.ConsoleExe
            debuginfo = false
            testFlagEmitFeeFeeAs100001 = false
            dumpDebugInfo = false
            debugSymbolFile = None

            (* Backend configuration *)
            typeCheckOnly = false
            parseOnly = false
            importAllReferencesOnly = false
            simulateException = None
            printAst = false
            tokenize = TokenizeOption.AndCompile
            testInteractionParser = false
            reportNumDecls = false
            printSignature = false
            printSignatureFile = ""
            printAllSignatureFiles = false
            xmlDocOutputFile = None
            stats = false
            generateFilterBlocks = false (* don't generate filter blocks *)

            signer = None
            container = None
            maxErrors = 100
            abortOnError = false
            baseAddress = None
            checksumAlgorithm = HashAlgorithm.Sha256

            delaysign = false
            publicsign = false
            version = VersionNone
            metadataVersion = None
            standalone = false
            extraStaticLinkRoots = []
            compressMetadata = false
            noSignatureData = false
            onlyEssentialOptimizationData = false
            useOptimizationDataFile = false
            jitTracking = true
            portablePDB = true
            embeddedPDB = false
            embedAllSource = false
            embedSourceList = []
            sourceLink = ""
            internConstantStrings = true
            extraOptimizationIterations = 0

            win32icon = ""
            win32res = ""
            win32manifest = ""
            includewin32manifest = true
            linkResources = []
            showFullPaths = false
            diagnosticStyle = DiagnosticStyle.Default

            utf8output = false
            flatErrors = false

#if DEBUG
            showOptimizationData = false
#endif
            showTerms = false
            writeTermsToFiles = false

            doDetuple = false
            doTLR = false
            doFinalSimplify = false
            optsOn = false
            optSettings =
                { OptimizationSettings.Defaults with
                    processingMode =
                        if FSharpExperimentalFeaturesEnabledAutomatically then
                            OptimizationProcessingMode.Parallel
                        else
                            OptimizationProcessingMode.Sequential
                }
            emitTailcalls = true
            deterministic = false
            concurrentBuild = true
            parallelIlxGen = FSharpExperimentalFeaturesEnabledAutomatically
            emitMetadataAssembly = MetadataAssemblyGeneration.None
            preferredUiLang = None
            lcid = None
#if FABLE_COMPILER
            productNameForBannerText = "Microsoft (R) F# Compiler"
#else
            productNameForBannerText = FSharpProductName
#endif
            showBanner = true
            showTimes = false
            writeTimesToFile = None
            showLoadedAssemblies = false
            continueAfterParseFailure = false
#if !NO_TYPEPROVIDERS
            showExtensionTypeMessages = false
#endif
            pause = false
            alwaysCallVirt = true
            noDebugAttributes = false
            useReflectionFreeCodeGen = false
            emitDebugInfoInQuotations = false
            exename = None
            shadowCopyReferences = false
            useSdkRefs = true
            fxResolver = None
            bufferWidth = None
            fsiMultiAssemblyEmit = true
            internalTestSpanStackReferring = false
            noConditionalErasure = false
            pathMap = PathMap.empty
            applyLineDirectives = true
            langVersion = LanguageVersion.Default
            implicitIncludeDir = implicitIncludeDir
            defaultFSharpBinariesDir = defaultFSharpBinariesDir
            reduceMemoryUsage = reduceMemoryUsage
            legacyReferenceResolver = legacyReferenceResolver
            isInteractive = isInteractive
            isInvalidationSupported = isInvalidationSupported
            copyFSharpCore = defaultCopyFSharpCore
            tryGetMetadataSnapshot = tryGetMetadataSnapshot
            useFsiAuxLib = isInteractive
            rangeForErrors = rangeForErrors
            sdkDirOverride = sdkDirOverride
            xmlDocInfoLoader = None
            exiter = QuitProcessExiter
            parallelReferenceResolution = ParallelReferenceResolution.Off
            captureIdentifiersWhenParsing = false
            typeCheckingConfig =
                {
                    TypeCheckingConfig.Mode =
                        if FSharpExperimentalFeaturesEnabledAutomatically then
                            TypeCheckingMode.Graph
                        else
                            TypeCheckingMode.Sequential
                    DumpGraph = false
                }
            dumpSignatureData = false
            strictIndentation = None
        }

    member tcConfigB.FxResolver =
        // We compute the FxResolver on-demand.  It depends on some configuration parameters
        // which may be later adjusted.
        match tcConfigB.fxResolver with
        | None ->
#if FABLE_COMPILER
            FxResolver()
#else
            let useDotNetFramework = (tcConfigB.primaryAssembly = PrimaryAssembly.Mscorlib)

            let fxResolver =
                FxResolver(
                    useDotNetFramework,
                    tcConfigB.implicitIncludeDir,
                    rangeForErrors = tcConfigB.rangeForErrors,
                    useSdkRefs = tcConfigB.useSdkRefs,
                    isInteractive = tcConfigB.isInteractive,
                    sdkDirOverride = tcConfigB.sdkDirOverride
                )

            tcConfigB.fxResolver <- Some fxResolver
            fxResolver
#endif //!FABLE_COMPILER
        | Some fxResolver -> fxResolver

    member tcConfigB.SetPrimaryAssembly primaryAssembly =
        tcConfigB.primaryAssembly <- primaryAssembly
        tcConfigB.fxResolver <- None // this needs to be recreated when the primary assembly changes

    member tcConfigB.SetUseSdkRefs useSdkRefs =
        tcConfigB.useSdkRefs <- useSdkRefs
        tcConfigB.fxResolver <- None // this needs to be recreated when the primary assembly changes

#if !FABLE_COMPILER

    member tcConfigB.ResolveSourceFile(m, nm, pathLoadedFrom) =
        use _ = UseBuildPhase BuildPhase.Parameter

        let paths =
            seq {
                yield! tcConfigB.includes
                yield pathLoadedFrom
            }

        ResolveFileUsingPaths(paths, m, nm)

    /// Decide names of output file, pdb and assembly
    member tcConfigB.DecideNames sourceFiles =
        use _ = UseBuildPhase BuildPhase.Parameter

        if List.isEmpty sourceFiles then
            errorR (Error(FSComp.SR.buildNoInputsSpecified (), rangeCmdArgs))

        let ext () =
            match tcConfigB.target with
            | CompilerTarget.Dll -> ".dll"
            | CompilerTarget.Module -> ".netmodule"
            | CompilerTarget.ConsoleExe
            | CompilerTarget.WinExe -> ".exe"

        let implFiles =
            sourceFiles
            |> List.filter (fun fileName -> List.exists (FileSystemUtils.checkSuffix fileName) FSharpImplFileSuffixes)

        let outfile =
            match tcConfigB.outputFile, List.rev implFiles with
            | None, [] -> "out" + ext ()
            | None, h :: _ ->
                let basic = FileSystemUtils.fileNameOfPath h

                let modname =
                    try
                        FileSystemUtils.chopExtension basic
                    with _ ->
                        basic

                modname + (ext ())
            | Some f, _ -> f

        let assemblyName =
            let baseName = FileSystemUtils.fileNameOfPath outfile
            (FileSystemUtils.fileNameWithoutExtension baseName)

        let pdbfile =
            if tcConfigB.debuginfo then
                Some(
                    match tcConfigB.debugSymbolFile with
                    | None -> getDebugFileName outfile
                    | Some f -> f
                )
            elif (tcConfigB.debugSymbolFile <> None) && (not tcConfigB.debuginfo) then
                error (Error(FSComp.SR.buildPdbRequiresDebug (), rangeStartup))
            else
                None

        tcConfigB.outputFile <- Some outfile
        outfile, pdbfile, assemblyName

#endif //!FABLE_COMPILER

    member tcConfigB.TurnWarningOff(m, s: string) =
        use _ = UseBuildPhase BuildPhase.Parameter

        match GetWarningNumber(m, s) with
        | None -> ()
        | Some n ->
            // nowarn:62 turns on mlCompatibility, e.g. shows ML compat items in intellisense menus
            if n = 62 then
                tcConfigB.mlCompatibility <- true

            tcConfigB.diagnosticsOptions <-
                { tcConfigB.diagnosticsOptions with
                    WarnOff = ListSet.insert (=) n tcConfigB.diagnosticsOptions.WarnOff
                }

    member tcConfigB.TurnWarningOn(m, s: string) =
        use _ = UseBuildPhase BuildPhase.Parameter

        match GetWarningNumber(m, s) with
        | None -> ()
        | Some n ->
            // warnon 62 turns on mlCompatibility, e.g. shows ML compat items in intellisense menus
            if n = 62 then
                tcConfigB.mlCompatibility <- false

            tcConfigB.diagnosticsOptions <-
                { tcConfigB.diagnosticsOptions with
                    WarnOn = ListSet.insert (=) n tcConfigB.diagnosticsOptions.WarnOn
                }

    member tcConfigB.AddIncludePath(m, path, pathIncludedFrom) =
#if FABLE_COMPILER
        ignore<range * string * string> (m, path, pathIncludedFrom)
        ()
#else //!FABLE_COMPILER
        let absolutePath = ComputeMakePathAbsolute pathIncludedFrom path

        let ok =
            let existsOpt =
                try
                    Some(FileSystem.DirectoryExistsShim absolutePath)
                with _ ->
                    warning (Error(FSComp.SR.buildInvalidSearchDirectory path, m))
                    None

            match existsOpt with
            | Some exists ->
                if not exists then
                    warning (Error(FSComp.SR.buildSearchDirectoryNotFound absolutePath, m))

                exists
            | None -> false

        if ok && not (List.contains absolutePath tcConfigB.includes) then
            tcConfigB.includes <- tcConfigB.includes ++ absolutePath
#endif //!FABLE_COMPILER

    member tcConfigB.AddLoadedSource(m, originalPath, pathLoadedFrom) =
#if FABLE_COMPILER
        ignore<range * string * string> (m, originalPath, pathLoadedFrom)
        ()
#else //!FABLE_COMPILER
        if FileSystem.IsInvalidPathShim originalPath then
            warning (Error(FSComp.SR.buildInvalidFilename originalPath, m))
        else
            let path =
                let paths =
                    seq {
                        yield! tcConfigB.includes
                        yield pathLoadedFrom
                    }

                match TryResolveFileUsingPaths(paths, m, originalPath) with
                | Some path -> path
                | None ->
                    // File doesn't exist in the paths. Assume it will be in the load-ed from directory.
                    ComputeMakePathAbsolute pathLoadedFrom originalPath

            if not (List.contains path (List.map (fun (_, _, path) -> path) tcConfigB.loadedSources)) then
                tcConfigB.loadedSources <- tcConfigB.loadedSources ++ (m, originalPath, path)
#endif //!FABLE_COMPILER

    member tcConfigB.AddEmbeddedSourceFile fileName =
        tcConfigB.embedSourceList <- tcConfigB.embedSourceList ++ fileName

    member tcConfigB.AddEmbeddedResource fileName =
        tcConfigB.embedResources <- tcConfigB.embedResources ++ fileName

    member tcConfigB.AddCompilerToolsByPath path =
        if not (tcConfigB.compilerToolPaths |> List.exists (fun text -> path = text)) then // NOTE: We keep same paths if range is different.
            let compilerToolPath =
                tcConfigB.compilerToolPaths
                |> List.tryPick (fun text -> if text = path then Some text else None)

            if compilerToolPath.IsNone then
                tcConfigB.compilerToolPaths <- tcConfigB.compilerToolPaths ++ path

    member tcConfigB.AddReferencedAssemblyByPath(m, path) =
        if FileSystem.IsInvalidPathShim path then
            warning (Error(FSComp.SR.buildInvalidAssemblyName (path), m))
        elif
            not (
                tcConfigB.referencedDLLs
                |> List.exists (fun ar2 -> equals m ar2.Range && path = ar2.Text)
            )
        then // NOTE: We keep same paths if range is different.
            let projectReference =
                tcConfigB.projectReferences
                |> List.tryPick (fun pr -> if pr.FileName = path then Some pr else None)

            tcConfigB.referencedDLLs <- tcConfigB.referencedDLLs ++ AssemblyReference(m, path, projectReference)

#if !FABLE_COMPILER
    member tcConfigB.AddDependencyManagerText(packageManager: IDependencyManagerProvider, lt, m, path: string) =
        tcConfigB.packageManagerLines <- PackageManagerLine.AddLineWithKey packageManager.Key lt path m tcConfigB.packageManagerLines

    member tcConfigB.AddReferenceDirective(dependencyProvider: DependencyProvider, m, path: string, directive) =
        let output = tcConfigB.outputDir |> Option.defaultValue ""

        let reportError =
            ResolvingErrorReport(fun errorType err msg ->
                let error = err, msg

                match errorType with
                | ErrorReportType.Warning -> warning (Error(error, m))
                | ErrorReportType.Error -> errorR (Error(error, m)))

        let dm =
            dependencyProvider.TryFindDependencyManagerInPath(tcConfigB.compilerToolPaths, output, reportError, path)

        match dm with
        // #r "Assembly"
        | NonNull path, Null -> tcConfigB.AddReferencedAssemblyByPath(m, path)

        | _, NonNull dependencyManager ->
            if tcConfigB.langVersion.SupportsFeature(LanguageFeature.PackageManagement) then
                tcConfigB.AddDependencyManagerText(dependencyManager, directive, m, path)
            else
                errorR (Error(FSComp.SR.packageManagementRequiresVFive (), m))

        | Null, Null when directive = Directive.Include -> errorR (Error(FSComp.SR.poundiNotSupportedByRegisteredDependencyManagers (), m))

        | Null, Null -> errorR (Error(FSComp.SR.buildInvalidHashrDirective (), m))
#endif //!FABLE_COMPILER

    member tcConfigB.RemoveReferencedAssemblyByPath(m, path) =
        tcConfigB.referencedDLLs <-
            tcConfigB.referencedDLLs
            |> List.filter (fun ar -> not (equals ar.Range m) || ar.Text <> path)

    member tcConfigB.AddPathMapping(oldPrefix, newPrefix) =
        tcConfigB.pathMap <- tcConfigB.pathMap |> PathMap.addMapping oldPrefix newPrefix

    static member SplitCommandLineResourceInfo(ri: string) =
        let p = ri.IndexOf ','

        if p <> -1 then
            let file = String.sub ri 0 p
            let rest = String.sub ri (p + 1) (String.length ri - p - 1)
            let p = rest.IndexOf ','

            if p <> -1 then
                let name = String.sub rest 0 p + ".resources"
                let pubpri = String.sub rest (p + 1) (rest.Length - p - 1)

                if pubpri = "public" then
                    file, name, ILResourceAccess.Public
                elif pubpri = "private" then
                    file, name, ILResourceAccess.Private
                else
                    error (Error(FSComp.SR.buildInvalidPrivacy pubpri, rangeStartup))
            else
                file, rest, ILResourceAccess.Public
        else
            ri, FileSystemUtils.fileNameOfPath ri, ILResourceAccess.Public

//----------------------------------------------------------------------------
// TcConfig
//--------------------------------------------------------------------------

/// This type is immutable and must be kept as such. Do not extract or mutate the underlying data except by cloning it.
[<Sealed>]
type TcConfig private (data: TcConfigBuilder, validate: bool) =

#if FABLE_COMPILER
    let _ = validate
    let clrRootValue, targetFrameworkVersionValue = None, ""

#else //!FABLE_COMPILER

    // Validate the inputs - this helps ensure errors in options are shown in visual studio rather than only when built
    // However we only validate a minimal number of options at the moment
    do
        if validate then
            try
                data.version.GetVersionInfo(data.implicitIncludeDir) |> ignore
            with e ->
                errorR e

    // clone the input builder to ensure nobody messes with it.
    let data = { data with pause = data.pause }

    let computeKnownDllReference libraryName =
        let defaultCoreLibraryReference =
            AssemblyReference(range0, libraryName + ".dll", None)

        let nameOfDll (assemRef: AssemblyReference) =
            let fileName = ComputeMakePathAbsolute data.implicitIncludeDir assemRef.Text

            if FileSystem.FileExistsShim fileName then
                assemRef, Some fileName
            else
                // If the file doesn't exist, let reference resolution logic report the error later...
                defaultCoreLibraryReference,
                if equals assemRef.Range rangeStartup then
                    Some fileName
                else
                    None

        match
            data.referencedDLLs
            |> List.filter (fun assemblyReference -> assemblyReference.SimpleAssemblyNameIs libraryName)
        with
        | [] -> defaultCoreLibraryReference, None
        | [ r ]
        | r :: _ -> nameOfDll r

    // Look for an explicit reference to mscorlib/netstandard.dll or System.Runtime.dll and use that to compute clrRoot and targetFrameworkVersion
    let primaryAssemblyReference, primaryAssemblyExplicitFilenameOpt =
        computeKnownDllReference (data.primaryAssembly.Name)

    let fslibReference =
        // Look for explicit FSharp.Core reference otherwise use version that was referenced by compiler
        let dllReference, fileNameOpt = computeKnownDllReference getFSharpCoreLibraryName

        match fileNameOpt with
        | Some _ -> dllReference
        | None -> AssemblyReference(range0, getDefaultFSharpCoreLocation (), None)

    // clrRoot: the location of the primary assembly (mscorlib.dll or netstandard.dll or System.Runtime.dll)
    //
    // targetFrameworkVersionValue: Normally just HighestInstalledNetFrameworkVersion()
    //
    // Note, when mscorlib.dll has been given explicitly the actual value of
    // targetFrameworkVersion shouldn't matter since resolution has already happened.
    // In those cases where it does matter (e.g. --noframework is not being used or we are processing further
    // resolutions for a script) then it is correct to just use HighestInstalledNetFrameworkVersion().
    let clrRootValue, targetFrameworkVersionValue =
        match primaryAssemblyExplicitFilenameOpt with
        | Some primaryAssemblyFilename ->
            let fileName =
                ComputeMakePathAbsolute data.implicitIncludeDir primaryAssemblyFilename

            try
                let clrRoot = Some(Path.GetDirectoryName(FileSystem.GetFullPathShim fileName))
                clrRoot, data.legacyReferenceResolver.Impl.HighestInstalledNetFrameworkVersion()
            with e ->
                // We no longer expect the above to fail but leaving this just in case
                error (Error(FSComp.SR.buildErrorOpeningBinaryFile (fileName, e.Message), rangeStartup))
        | None -> None, data.legacyReferenceResolver.Impl.HighestInstalledNetFrameworkVersion()

    let makePathAbsolute path =
        ComputeMakePathAbsolute data.implicitIncludeDir path

    let targetFrameworkDirectories =
        try
            [
                // Check if we are given an explicit framework root - if so, use that
                match clrRootValue with
                | Some x ->
                    let clrRoot = makePathAbsolute x
                    yield clrRoot
                    let clrFacades = Path.Combine(clrRoot, "Facades")

                    if FileSystem.DirectoryExistsShim(clrFacades) then
                        yield clrFacades

                | None ->
                    match data.resolutionEnvironment with
                    | LegacyResolutionEnvironment.CompilationAndEvaluation ->
                        // Default compilation-and-execution-time references on .NET Framework and Mono, e.g. for F# Interactive
                        // In the current way of doing things, F# Interactive refers to implementation assemblies.
                        let runtimeRoot = RuntimeEnvironment.GetRuntimeDirectory().TrimEnd('/', '\\')
                        yield runtimeRoot

                        let runtimeRootFacades = Path.Combine(runtimeRoot, "Facades")

                        if FileSystem.DirectoryExistsShim runtimeRootFacades then
                            yield runtimeRootFacades // System.Runtime.dll is in /usr/lib/mono/4.5/Facades

                        let runtimeRootWPF = Path.Combine(runtimeRoot, "WPF")

                        if FileSystem.DirectoryExistsShim runtimeRootWPF then
                            yield runtimeRootWPF // PresentationCore.dll is in C:\Windows\Microsoft.NET\Framework\v4.0.30319\WPF

                        match data.FxResolver.GetFrameworkRefsPackDirectory() with
                        | Some path when FileSystem.DirectoryExistsShim(path) -> yield path
                        | _ -> ()

                    | LegacyResolutionEnvironment.EditingOrCompilation _ ->
                        // Default compilation-time references on .NET Framework
                        //
                        // This is the normal case for "fsc.exe a.fs". We refer to the reference assemblies folder.
                        let frameworkRoot =
                            data.legacyReferenceResolver.Impl.DotNetFrameworkReferenceAssembliesRootDirectory

                        let frameworkRootVersion = Path.Combine(frameworkRoot, targetFrameworkVersionValue)
                        yield frameworkRootVersion
                        let facades = Path.Combine(frameworkRootVersion, "Facades")

                        if FileSystem.DirectoryExistsShim facades then
                            yield facades

                        match data.FxResolver.GetFrameworkRefsPackDirectory() with
                        | Some path when FileSystem.DirectoryExistsShim(path) -> yield path
                        | _ -> ()
            ]
        with RecoverableException e ->
            errorRecovery e range0
            []

#endif //!FABLE_COMPILER

    member _.bufferWidth = data.bufferWidth
    member _.fsiMultiAssemblyEmit = data.fsiMultiAssemblyEmit
    member _.FxResolver = data.FxResolver
    member _.strictIndentation = data.strictIndentation
    member _.primaryAssembly = data.primaryAssembly
    member _.noFeedback = data.noFeedback
    member _.stackReserveSize = data.stackReserveSize
    member _.implicitIncludeDir = data.implicitIncludeDir

    member _.openDebugInformationForLaterStaticLinking =
        data.openDebugInformationForLaterStaticLinking

    member _.fsharpBinariesDir = data.defaultFSharpBinariesDir
    member _.compilingFSharpCore = data.compilingFSharpCore
    member _.useIncrementalBuilder = data.useIncrementalBuilder
    member _.includes = data.includes
    member _.implicitOpens = data.implicitOpens
    member _.useFsiAuxLib = data.useFsiAuxLib
    member _.implicitlyReferenceDotNetAssemblies = data.implicitlyReferenceDotNetAssemblies
    member _.implicitlyResolveAssemblies = data.implicitlyResolveAssemblies
    member _.resolutionEnvironment = data.resolutionEnvironment
    member _.indentationAwareSyntax = data.indentationAwareSyntax
    member _.conditionalDefines = data.conditionalDefines
    member _.loadedSources = data.loadedSources
    member _.compilerToolPaths = data.compilerToolPaths
    member _.referencedDLLs = data.referencedDLLs
    member _.knownUnresolvedReferences = data.knownUnresolvedReferences
    member _.clrRoot = clrRootValue
    member _.reduceMemoryUsage = data.reduceMemoryUsage
    member _.subsystemVersion = data.subsystemVersion
    member _.useHighEntropyVA = data.useHighEntropyVA
    member _.inputCodePage = data.inputCodePage
    member _.clearResultsCache = data.clearResultsCache
    member _.embedResources = data.embedResources
    member _.diagnosticsOptions = data.diagnosticsOptions
    member _.mlCompatibility = data.mlCompatibility
    member _.checkOverflow = data.checkOverflow
    member _.showReferenceResolutions = data.showReferenceResolutions
    member _.outputDir = data.outputDir
    member _.outputFile = data.outputFile
    member _.platform = data.platform
    member _.prefer32Bit = data.prefer32Bit
    member _.useSimpleResolution = data.useSimpleResolution
    member _.target = data.target
    member _.debuginfo = data.debuginfo
    member _.testFlagEmitFeeFeeAs100001 = data.testFlagEmitFeeFeeAs100001
    member _.dumpDebugInfo = data.dumpDebugInfo
    member _.debugSymbolFile = data.debugSymbolFile
    member _.typeCheckOnly = data.typeCheckOnly
    member _.parseOnly = data.parseOnly
    member _.importAllReferencesOnly = data.importAllReferencesOnly
    member _.simulateException = data.simulateException
    member _.printAst = data.printAst
    member _.targetFrameworkVersion = targetFrameworkVersionValue
    member _.tokenize = data.tokenize
    member _.testInteractionParser = data.testInteractionParser
    member _.reportNumDecls = data.reportNumDecls
    member _.printSignature = data.printSignature
    member _.printSignatureFile = data.printSignatureFile
    member _.printAllSignatureFiles = data.printAllSignatureFiles
    member _.xmlDocOutputFile = data.xmlDocOutputFile
    member _.stats = data.stats
    member _.generateFilterBlocks = data.generateFilterBlocks
    member _.signer = data.signer
    member _.container = data.container
    member _.delaysign = data.delaysign
    member _.publicsign = data.publicsign
    member _.version = data.version
    member _.metadataVersion = data.metadataVersion
    member _.standalone = data.standalone
    member _.extraStaticLinkRoots = data.extraStaticLinkRoots
    member _.compressMetadata = data.compressMetadata
    member _.noSignatureData = data.noSignatureData
    member _.onlyEssentialOptimizationData = data.onlyEssentialOptimizationData
    member _.useOptimizationDataFile = data.useOptimizationDataFile
    member _.jitTracking = data.jitTracking
    member _.portablePDB = data.portablePDB
    member _.embeddedPDB = data.embeddedPDB
    member _.embedAllSource = data.embedAllSource
    member _.embedSourceList = data.embedSourceList
    member _.sourceLink = data.sourceLink
    member _.packageManagerLines = data.packageManagerLines
    member _.internConstantStrings = data.internConstantStrings
    member _.extraOptimizationIterations = data.extraOptimizationIterations
    member _.win32icon = data.win32icon
    member _.win32res = data.win32res
    member _.win32manifest = data.win32manifest
    member _.includewin32manifest = data.includewin32manifest
    member _.linkResources = data.linkResources
    member _.showFullPaths = data.showFullPaths
    member _.diagnosticStyle = data.diagnosticStyle
    member _.utf8output = data.utf8output
    member _.flatErrors = data.flatErrors
    member _.maxErrors = data.maxErrors
    member _.baseAddress = data.baseAddress
    member _.checksumAlgorithm = data.checksumAlgorithm
#if DEBUG
    member _.showOptimizationData = data.showOptimizationData
#endif
    member _.showTerms = data.showTerms
    member _.writeTermsToFiles = data.writeTermsToFiles
    member _.doDetuple = data.doDetuple
    member _.doTLR = data.doTLR
    member _.doFinalSimplify = data.doFinalSimplify
    member _.optSettings = data.optSettings
    member _.emitTailcalls = data.emitTailcalls
    member _.deterministic = data.deterministic
    member _.concurrentBuild = data.concurrentBuild
    member _.parallelIlxGen = data.parallelIlxGen
    member _.emitMetadataAssembly = data.emitMetadataAssembly
    member _.pathMap = data.pathMap
    member _.langVersion = data.langVersion
    member _.preferredUiLang = data.preferredUiLang
    member _.lcid = data.lcid
    member _.optsOn = data.optsOn
    member _.productNameForBannerText = data.productNameForBannerText
    member _.showBanner = data.showBanner
    member _.showTimes = data.showTimes
    member _.writeTimesToFile = data.writeTimesToFile
    member _.showLoadedAssemblies = data.showLoadedAssemblies
    member _.continueAfterParseFailure = data.continueAfterParseFailure
#if !NO_TYPEPROVIDERS
    member _.showExtensionTypeMessages = data.showExtensionTypeMessages
#endif
    member _.pause = data.pause
    member _.alwaysCallVirt = data.alwaysCallVirt
    member _.noDebugAttributes = data.noDebugAttributes
    member _.useReflectionFreeCodeGen = data.useReflectionFreeCodeGen
    member _.isInteractive = data.isInteractive
    member _.isInvalidationSupported = data.isInvalidationSupported
    member _.emitDebugInfoInQuotations = data.emitDebugInfoInQuotations
    member _.copyFSharpCore = data.copyFSharpCore
    member _.shadowCopyReferences = data.shadowCopyReferences
    member _.useSdkRefs = data.useSdkRefs
    member _.sdkDirOverride = data.sdkDirOverride
    member _.tryGetMetadataSnapshot = data.tryGetMetadataSnapshot
    member _.internalTestSpanStackReferring = data.internalTestSpanStackReferring
    member _.noConditionalErasure = data.noConditionalErasure
    member _.applyLineDirectives = data.applyLineDirectives
    member _.xmlDocInfoLoader = data.xmlDocInfoLoader
    member _.exiter = data.exiter
    member _.parallelReferenceResolution = data.parallelReferenceResolution
    member _.captureIdentifiersWhenParsing = data.captureIdentifiersWhenParsing
    member _.typeCheckingConfig = data.typeCheckingConfig
    member _.dumpSignatureData = data.dumpSignatureData

    static member Create(builder, validate) =
        use _ = UseBuildPhase BuildPhase.Parameter
        TcConfig(builder, validate)

    member _.legacyReferenceResolver = data.legacyReferenceResolver

    member _.CloneToBuilder() =
        { data with
            conditionalDefines = data.conditionalDefines
        }

#if !FABLE_COMPILER
    member tcConfig.ComputeCanContainEntryPoint(sourceFiles: string list) =
        let n = sourceFiles.Length in (sourceFiles |> List.mapi (fun i _ -> (i = n - 1)), tcConfig.target.IsExe)

    // This call can fail if no CLR is found (this is the path to mscorlib)
    member _.GetTargetFrameworkDirectories() = targetFrameworkDirectories
#endif //!FABLE_COMPILER

    member tcConfig.ComputeIndentationAwareSyntaxInitialStatus fileName =
        use _unwindBuildPhase = UseBuildPhase BuildPhase.Parameter

        let indentationAwareSyntaxOnByDefault =
            List.exists (FileSystemUtils.checkSuffix fileName) FSharpIndentationAwareSyntaxFileSuffixes

        if indentationAwareSyntaxOnByDefault then
            (tcConfig.indentationAwareSyntax <> Some false)
        else
            (tcConfig.indentationAwareSyntax = Some true)

#if !FABLE_COMPILER

    member tcConfig.GetAvailableLoadedSources() =
        use _unwindBuildPhase = UseBuildPhase BuildPhase.Parameter

        let resolveLoadedSource (m, originalPath, path) =
            try
                if not (FileSystem.FileExistsShim(path)) then
                    let secondTrial =
                        tcConfig.includes
                        |> List.tryPick (fun root ->
                            let path = ComputeMakePathAbsolute root originalPath
                            if FileSystem.FileExistsShim(path) then Some path else None)

                    match secondTrial with
                    | Some path -> Some(m, path)
                    | None ->
                        error (LoadedSourceNotFoundIgnoring(path, m))
                        None
                else
                    Some(m, path)
            with RecoverableException e ->
                errorRecovery e m
                None

        tcConfig.loadedSources |> List.choose resolveLoadedSource |> List.distinct

    // This is not the complete set of search paths, it is just the set
    // that is special to F# (as compared to MSBuild resolution)
    member tcConfig.GetSearchPathsForLibraryFiles() =
        [
            yield! tcConfig.GetTargetFrameworkDirectories()
            yield! List.map tcConfig.MakePathAbsolute tcConfig.includes
            tcConfig.implicitIncludeDir
            tcConfig.fsharpBinariesDir
        ]

    member _.MakePathAbsolute path = makePathAbsolute path

    member _.ResolveSourceFile(m, fileName, pathLoadedFrom) =
        data.ResolveSourceFile(m, fileName, pathLoadedFrom)

    member _.PrimaryAssemblyDllReference() = primaryAssemblyReference

    member _.CoreLibraryDllReference() = fslibReference

    member _.GetNativeProbingRoots() = data.GetNativeProbingRoots()

    /// A closed set of assemblies where, for any subset S:
    ///    - the TcImports object built for S (and thus the F# Compiler CCUs for the assemblies in S)
    ///       is a resource that can be shared between any two IncrementalBuild objects that reference
    ///       precisely S
    ///
    /// Determined by looking at the set of assemblies referenced by f# .
    ///
    /// Returning true may mean that the file is locked and/or placed into the
    /// 'framework' reference set that is potentially shared across multiple compilations.
    member tcConfig.IsSystemAssembly(fileName: string) =
        try
            let dirName = Path.GetDirectoryName fileName
            let baseName = FileSystemUtils.fileNameWithoutExtension fileName

            FileSystem.FileExistsShim fileName
            && ((tcConfig.GetTargetFrameworkDirectories() |> List.contains dirName)
                || FxResolver.GetSystemAssemblies().Contains baseName
                || FxResolver.IsReferenceAssemblyPackDirectoryApprox dirName)
        with _ ->
            false

    member tcConfig.GenerateSignatureData =
        not tcConfig.standalone && not tcConfig.noSignatureData

    member tcConfig.GenerateOptimizationData = tcConfig.GenerateSignatureData

    member tcConfig.assumeDotNetFramework =
        tcConfig.primaryAssembly = PrimaryAssembly.Mscorlib

/// Represents a computation to return a TcConfig. Normally this is just a constant immutable TcConfig,
/// but for F# Interactive it may be based on an underlying mutable TcConfigBuilder.
type TcConfigProvider =
    | TcConfigProvider of (CompilationThreadToken -> TcConfig)

    member x.Get ctok =
        (let (TcConfigProvider f) = x in f ctok)

    /// Get a TcConfigProvider which will return only the exact TcConfig.
    static member Constant tcConfig = TcConfigProvider(fun _ctok -> tcConfig)

    /// Get a TcConfigProvider which will continue to respect changes in the underlying
    /// TcConfigBuilder rather than delivering snapshots.
    static member BasedOnMutableBuilder tcConfigB =
        TcConfigProvider(fun _ctok -> TcConfig.Create(tcConfigB, validate = false))

#endif //!FABLE_COMPILER

#if FABLE_COMPILER
let GetFSharpCoreLibraryName () = "FSharp.Core"
#else
let GetFSharpCoreLibraryName () = getFSharpCoreLibraryName
#endif
