Make arg parser more AOT-friendly (#253)

* Bump Microsoft.NET.Test.Sdk from 17.11.0 to 17.11.1

Bumps [Microsoft.NET.Test.Sdk](https://github.com/microsoft/vstest) from 17.11.0 to 17.11.1.
- [Release notes](https://github.com/microsoft/vstest/releases)
- [Changelog](https://github.com/microsoft/vstest/blob/main/docs/releases.md)
- [Commits](https://github.com/microsoft/vstest/compare/v17.11.0...v17.11.1)

---
updated-dependencies:
- dependency-name: Microsoft.NET.Test.Sdk
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

* Bump fantomas from 6.3.11 to 6.3.12

Bumps [fantomas](https://github.com/fsprojects/fantomas) from 6.3.11 to 6.3.12.
- [Release notes](https://github.com/fsprojects/fantomas/releases)
- [Changelog](https://github.com/fsprojects/fantomas/blob/main/CHANGELOG.md)
- [Commits](https://github.com/fsprojects/fantomas/compare/v6.3.11...v6.3.12)

---
updated-dependencies:
- dependency-name: fantomas
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

* Deps

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Smaug123 <3138005+Smaug123@users.noreply.github.com>

.config/dotnet-tools.json

@@ -3,13 +3,13 @@
   "isRoot": true,
   "tools": {
     "fantomas": {
-      "version": "6.3.10",
+      "version": "6.3.12",
       "commands": [
         "fantomas"
       ]
     },
     "fsharp-analyzers": {
-      "version": "0.26.1",
+      "version": "0.27.0",
       "commands": [
         "fsharp-analyzers"
       ]

.fantomasignore

@@ -0,0 +1 @@
+.direnv/

.github/workflows/dotnet.yaml

@@ -222,7 +222,7 @@ jobs:
     if: ${{ always() }}
     runs-on: ubuntu-latest
     steps:
-      - uses: Smaug123/all-required-checks-complete-action@d0ef051668d922e3591cc7c97156702946437f8d
+      - uses: G-Research/common-actions/check-required-lite@2b7dc49cb14f3344fbe6019c14a31165e258c059
         with:
           needs-context: ${{ toJSON(needs) }}
 
@@ -241,7 +241,7 @@ jobs:
           name: nuget-package-attribute
           path: packed
       - name: Attest Build Provenance
-        uses: actions/attest-build-provenance@310b0a4a3b0b78ef57ecda988ee04b132db73ef8 # v1.4.1
+        uses: actions/attest-build-provenance@1c608d11d69870c2092266b3f9a6f3abbf17002c # v1.4.3
         with:
           subject-path: "packed/*.nupkg"
 
@@ -260,7 +260,7 @@ jobs:
           name: nuget-package-plugin
           path: packed
       - name: Attest Build Provenance
-        uses: actions/attest-build-provenance@310b0a4a3b0b78ef57ecda988ee04b132db73ef8 # v1.4.1
+        uses: actions/attest-build-provenance@1c608d11d69870c2092266b3f9a6f3abbf17002c # v1.4.3
         with:
           subject-path: "packed/*.nupkg"
 
@@ -290,7 +290,7 @@ jobs:
         run: nix develop --command bash -c 'echo "dotnet=$(which dotnet)" >> $GITHUB_OUTPUT'
       - name: Publish to NuGet
         id: publish-success
-        uses: Smaug123/publish-nuget-action@76df889166633c2dc613560c092882aabe260df0
+        uses: G-Research/common-actions/publish-nuget@2b7dc49cb14f3344fbe6019c14a31165e258c059
         with:
           package-name: WoofWare.Myriad.Plugins.Attributes
           nuget-key: ${{ secrets.NUGET_API_KEY }}
@@ -323,7 +323,7 @@ jobs:
         run: nix develop --command bash -c 'echo "dotnet=$(which dotnet)" >> $GITHUB_OUTPUT'
       - name: Publish to NuGet
         id: publish-success
-        uses: Smaug123/publish-nuget-action@76df889166633c2dc613560c092882aabe260df0
+        uses: G-Research/common-actions/publish-nuget@2b7dc49cb14f3344fbe6019c14a31165e258c059
         with:
           package-name: WoofWare.Myriad.Plugins
           nuget-key: ${{ secrets.NUGET_API_KEY }}

.gitignore

@@ -11,3 +11,4 @@ result
 analysis.sarif
 .direnv/
 .venv/
+.vs/

CHANGELOG.md

@@ -1,5 +1,9 @@
 Notable changes are recorded here.
 
+# WoofWare.Myriad.Plugins 2.2.1, WoofWare.Myriad.Plugins.Attributes 3.2.1
+
+New generator: `ArgParser`, a basic reflection-free argument parser.
+
 # WoofWare.Myriad.Plugins 2.1.45, WoofWare.Myriad.Plugins.Attributes 3.1.7
 
 The NuGet packages are now attested to through [GitHub Attestations](https://github.blog/2024-05-02-introducing-artifact-attestations-now-in-public-beta/).

ConsumePlugin/Args.fs

@@ -93,3 +93,105 @@ type DatesAndTimes =
         [<InvariantCulture ; ParseExact @"hh\:mm\:ss">]
         InvariantExact : TimeSpan
     }
+
+type ChildRecord =
+    {
+        Thing1 : int
+        Thing2 : string
+    }
+
+[<ArgParser true>]
+type ParentRecord =
+    {
+        Child : ChildRecord
+        AndAnother : bool
+    }
+
+type ChildRecordWithPositional =
+    {
+        Thing1 : int
+        [<PositionalArgs>]
+        Thing2 : Uri list
+    }
+
+[<ArgParser true>]
+type ParentRecordChildPos =
+    {
+        Child : ChildRecordWithPositional
+        AndAnother : bool
+    }
+
+[<ArgParser true>]
+type ParentRecordSelfPos =
+    {
+        Child : ChildRecord
+        [<PositionalArgs>]
+        AndAnother : bool list
+    }
+
+[<ArgParser true>]
+type ChoicePositionals =
+    {
+        [<PositionalArgs>]
+        Args : Choice<string, string> list
+    }
+
+[<ArgParser true>]
+type ContainsBoolEnvVar =
+    {
+        [<ArgumentDefaultEnvironmentVariable "CONSUMEPLUGIN_THINGS">]
+        BoolVar : Choice<bool, bool>
+    }
+
+[<RequireQualifiedAccess>]
+module Consts =
+    [<Literal>]
+    let FALSE = false
+
+    [<Literal>]
+    let TRUE = true
+
+type DryRunMode =
+    | [<ArgumentFlag(Consts.FALSE)>] Wet
+    | [<ArgumentFlag true>] Dry
+
+[<ArgParser true>]
+type WithFlagDu =
+    {
+        DryRun : DryRunMode
+    }
+
+[<ArgParser true>]
+type ContainsFlagEnvVar =
+    {
+        // This phrasing is odd, but it's for a test. Nobody's really going to have `--dry-run`
+        // controlled by an env var!
+        [<ArgumentDefaultEnvironmentVariable "CONSUMEPLUGIN_THINGS">]
+        DryRun : Choice<DryRunMode, DryRunMode>
+    }
+
+[<ArgParser true>]
+type ContainsFlagDefaultValue =
+    {
+        [<ArgumentDefaultFunction>]
+        DryRun : Choice<DryRunMode, DryRunMode>
+    }
+
+    static member DefaultDryRun () = DryRunMode.Wet
+
+[<ArgParser true>]
+type ManyLongForms =
+    {
+        [<ArgumentLongForm "do-something-else">]
+        [<ArgumentLongForm "anotherarg">]
+        DoTheThing : string
+
+        [<ArgumentLongForm "turn-it-on">]
+        [<ArgumentLongForm "dont-turn-it-off">]
+        SomeFlag : bool
+    }
+
+[<RequireQualifiedAccess>]
+type private IrrelevantDu =
+    | Foo
+    | Bar

Directory.Build.props

@@ -10,7 +10,7 @@
     <WarnOn>FS3388,FS3559</WarnOn>
   </PropertyGroup>
   <ItemGroup>
-    <PackageReference Include="Nerdbank.GitVersioning" Version="3.6.141" PrivateAssets="all"/>
+    <PackageReference Include="Nerdbank.GitVersioning" Version="3.6.143" PrivateAssets="all"/>
     <SourceLinkGitHubHost Include="github.com" ContentUrl="https://raw.githubusercontent.com"/>
   </ItemGroup>
   <PropertyGroup Condition="'$(GITHUB_ACTION)' != ''">

WoofWare.Myriad.Plugins.Attributes/ArgParserAttributes.fs

@@ -61,3 +61,24 @@ type ParseExactAttribute (format : string) =
 /// `TimeSpan.ParseExact (s, @"hh\:mm\:ss", CultureInfo.InvariantCulture).
 type InvariantCultureAttribute () =
     inherit Attribute ()
+
+/// Attribute placed on a field of a two-case no-data discriminated union, indicating that this is "basically a bool".
+/// For example: `type DryRun = | [<ArgumentFlag true>] Dry | [<ArgumentFlag false>] Wet`
+/// A record with `{ DryRun : DryRun }` will then be parsed like `{ DryRun : bool }` (so the user supplies `--dry-run`),
+/// but that you get this strongly-typed value directly in the code (so you `match args.DryRun with | DryRun.Dry ...`).
+///
+/// You must put this attribute on both cases of the discriminated union, with opposite values in each case.
+type ArgumentFlagAttribute (flagValue : bool) =
+    inherit Attribute ()
+
+/// Attribute placed on a field of a record to specify a different long form from the default. If you place this
+/// attribute, you won't get the default: ArgFoo would normally be expressed as `--arg-foo`, but if you instead
+/// say `[<ArgumentLongForm "thingy-blah">]` or `[<ArgumentLongForm "thingy">]`, you instead use `--thingy-blah`
+/// or `--thingy` respectively.
+///
+/// You can place this argument multiple times.
+///
+/// Omit the initial `--` that you expect the user to type.
+[<AttributeUsage(AttributeTargets.Field, AllowMultiple = true)>]
+type ArgumentLongForm (s : string) =
+    inherit Attribute ()

WoofWare.Myriad.Plugins.Attributes/SurfaceBaseline.txt

@@ -7,8 +7,12 @@ WoofWare.Myriad.Plugins.ArgumentDefaultEnvironmentVariableAttribute inherit Syst
 WoofWare.Myriad.Plugins.ArgumentDefaultEnvironmentVariableAttribute..ctor [constructor]: string
 WoofWare.Myriad.Plugins.ArgumentDefaultFunctionAttribute inherit System.Attribute
 WoofWare.Myriad.Plugins.ArgumentDefaultFunctionAttribute..ctor [constructor]: unit
+WoofWare.Myriad.Plugins.ArgumentFlagAttribute inherit System.Attribute
+WoofWare.Myriad.Plugins.ArgumentFlagAttribute..ctor [constructor]: bool
 WoofWare.Myriad.Plugins.ArgumentHelpTextAttribute inherit System.Attribute
 WoofWare.Myriad.Plugins.ArgumentHelpTextAttribute..ctor [constructor]: string
+WoofWare.Myriad.Plugins.ArgumentLongForm inherit System.Attribute
+WoofWare.Myriad.Plugins.ArgumentLongForm..ctor [constructor]: string
 WoofWare.Myriad.Plugins.CreateCatamorphismAttribute inherit System.Attribute
 WoofWare.Myriad.Plugins.CreateCatamorphismAttribute..ctor [constructor]: string
 WoofWare.Myriad.Plugins.GenerateMockAttribute inherit System.Attribute

WoofWare.Myriad.Plugins.Attributes/Test/WoofWare.Myriad.Plugins.Attributes.Test.fsproj

@@ -1,10 +1,15 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
     <PropertyGroup>
-        <TargetFramework>net8.0</TargetFramework>
+      <TargetFramework>net8.0</TargetFramework>
 
-        <IsPackable>false</IsPackable>
-        <IsTestProject>true</IsTestProject>
+      <IsPackable>false</IsPackable>
+      <IsTestProject>true</IsTestProject>
+      <!--
+        Known high severity vulnerability
+        I have not yet seen a single instance where I care about this warning
+      -->
+      <NoWarn>$(NoWarn),NU1903</NoWarn>
     </PropertyGroup>
 
     <ItemGroup>
@@ -12,9 +17,9 @@
     </ItemGroup>
 
     <ItemGroup>
-        <PackageReference Include="ApiSurface" Version="4.0.44" />
-        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.10.0"/>
-        <PackageReference Include="NUnit" Version="4.1.0"/>
+        <PackageReference Include="ApiSurface" Version="4.1.5" />
+        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.11.1"/>
+        <PackageReference Include="NUnit" Version="4.2.2"/>
         <PackageReference Include="NUnit3TestAdapter" Version="4.6.0"/>
     </ItemGroup>
 

WoofWare.Myriad.Plugins.Attributes/version.json

@@ -1,5 +1,5 @@
 {
-  "version": "3.2",
+  "version": "3.4",
   "publicReleaseRefSpec": [
     "^refs/heads/main$"
   ],
@@ -12,4 +12,4 @@
     "./",
     ":^Test"
   ]
-}
+}

WoofWare.Myriad.Plugins.Test/TestArgParser/TestArgParser.fs

@@ -341,3 +341,280 @@ Input string was not in a correct format. (at arg --exact=11:34)
 Required argument '--exact' received no value"""
 
         count.Value |> shouldEqual 0
+
+    [<Test>]
+    let ``Can consume stacked record without positionals`` () =
+        let getEnvVar (_ : string) = failwith "should not call"
+
+        let parsed =
+            ParentRecord.parse' getEnvVar [ "--and-another=true" ; "--thing1=9" ; "--thing2=a thing!" ]
+
+        parsed
+        |> shouldEqual
+            {
+                Child =
+                    {
+                        Thing1 = 9
+                        Thing2 = "a thing!"
+                    }
+                AndAnother = true
+            }
+
+    [<Test>]
+    let ``Can consume stacked record, child has positionals`` () =
+        let getEnvVar (_ : string) = failwith "should not call"
+
+        let parsed =
+            ParentRecordChildPos.parse'
+                getEnvVar
+                [
+                    "--and-another=true"
+                    "--thing1=9"
+                    "--thing2=https://example.com"
+                    "--thing2=http://example.com"
+                ]
+
+        parsed.AndAnother |> shouldEqual true
+        parsed.Child.Thing1 |> shouldEqual 9
+
+        parsed.Child.Thing2
+        |> List.map (fun (x : Uri) -> x.ToString ())
+        |> shouldEqual [ "https://example.com/" ; "http://example.com/" ]
+
+    [<Test>]
+    let ``Can consume stacked record, child has no positionals, parent has positionals`` () =
+        let getEnvVar (_ : string) = failwith "should not call"
+
+        let parsed =
+            ParentRecordSelfPos.parse'
+                getEnvVar
+                [
+                    "--and-another=true"
+                    "--and-another=false"
+                    "--and-another=true"
+                    "--thing1=9"
+                    "--thing2=some"
+                ]
+
+        parsed
+        |> shouldEqual
+            {
+                Child =
+                    {
+                        Thing1 = 9
+                        Thing2 = "some"
+                    }
+                AndAnother = [ true ; false ; true ]
+            }
+
+    [<Test>]
+    let ``Help text for stacked records`` () =
+        let getEnvVar (_ : string) = failwith "should not call"
+
+        let exc =
+            Assert.Throws<exn> (fun () ->
+                ParentRecordSelfPos.parse' getEnvVar [ "--help" ] |> ignore<ParentRecordSelfPos>
+            )
+
+        exc.Message
+        |> shouldEqual
+            """Help text requested.
+--thing1  int32
+--thing2  string
+--and-another  bool (positional args) (can be repeated)"""
+
+    [<Test>]
+    let ``Positionals are tagged with Choice`` () =
+        let getEnvVar (_ : string) = failwith "should not call"
+
+        ChoicePositionals.parse' getEnvVar [ "a" ; "b" ; "--" ; "--c" ; "--help" ]
+        |> shouldEqual
+            {
+                Args = [ Choice1Of2 "a" ; Choice1Of2 "b" ; Choice2Of2 "--c" ; Choice2Of2 "--help" ]
+            }
+
+    let boolCases =
+        [
+            "1", true
+            "0", false
+            "true", true
+            "false", false
+            "TRUE", true
+            "FALSE", false
+        ]
+        |> List.map TestCaseData
+
+    [<TestCaseSource(nameof (boolCases))>]
+    let ``Bool env vars can be populated`` (envValue : string, boolValue : bool) =
+        let getEnvVar (s : string) =
+            s |> shouldEqual "CONSUMEPLUGIN_THINGS"
+            envValue
+
+        ContainsBoolEnvVar.parse' getEnvVar []
+        |> shouldEqual
+            {
+                BoolVar = Choice2Of2 boolValue
+            }
+
+    [<Test>]
+    let ``Bools can be treated with arity 0`` () =
+        let getEnvVar (_ : string) = failwith "do not call"
+
+        ContainsBoolEnvVar.parse' getEnvVar [ "--bool-var" ]
+        |> shouldEqual
+            {
+                BoolVar = Choice1Of2 true
+            }
+
+    [<TestCaseSource(nameof boolCases)>]
+    let ``Flag DUs can be parsed from env var`` (envValue : string, boolValue : bool) =
+        let getEnvVar (s : string) =
+            s |> shouldEqual "CONSUMEPLUGIN_THINGS"
+            envValue
+
+        let boolValue = if boolValue then DryRunMode.Dry else DryRunMode.Wet
+
+        ContainsFlagEnvVar.parse' getEnvVar []
+        |> shouldEqual
+            {
+                DryRun = Choice2Of2 boolValue
+            }
+
+    let dryRunData =
+        [
+            [ "--dry-run" ], DryRunMode.Dry
+            [ "--dry-run" ; "true" ], DryRunMode.Dry
+            [ "--dry-run=true" ], DryRunMode.Dry
+            [ "--dry-run" ; "True" ], DryRunMode.Dry
+            [ "--dry-run=True" ], DryRunMode.Dry
+            [ "--dry-run" ; "false" ], DryRunMode.Wet
+            [ "--dry-run=false" ], DryRunMode.Wet
+            [ "--dry-run" ; "False" ], DryRunMode.Wet
+            [ "--dry-run=False" ], DryRunMode.Wet
+        ]
+        |> List.map TestCaseData
+
+    [<TestCaseSource(nameof dryRunData)>]
+    let ``Flag DUs can be parsed`` (args : string list, expected : DryRunMode) =
+        let getEnvVar (_ : string) = failwith "do not call"
+
+        ContainsFlagEnvVar.parse' getEnvVar args
+        |> shouldEqual
+            {
+                DryRun = Choice1Of2 expected
+            }
+
+    [<TestCaseSource(nameof dryRunData)>]
+    let ``Flag DUs can be parsed, ArgumentDefaultFunction`` (args : string list, expected : DryRunMode) =
+        let getEnvVar (_ : string) = failwith "do not call"
+
+        ContainsFlagDefaultValue.parse' getEnvVar args
+        |> shouldEqual
+            {
+                DryRun = Choice1Of2 expected
+            }
+
+    [<Test>]
+    let ``Flag DUs can be given a default value`` () =
+        let getEnvVar (_ : string) = failwith "do not call"
+
+        ContainsFlagDefaultValue.parse' getEnvVar []
+        |> shouldEqual
+            {
+                DryRun = Choice2Of2 DryRunMode.Wet
+            }
+
+    [<Test>]
+    let ``Help text for flag DU`` () =
+        let getEnvVar (_ : string) = failwith "do not call"
+
+        let exc =
+            Assert.Throws<exn> (fun () ->
+                ContainsFlagDefaultValue.parse' getEnvVar [ "--help" ]
+                |> ignore<ContainsFlagDefaultValue>
+            )
+
+        exc.Message
+        |> shouldEqual
+            """Help text requested.
+--dry-run  bool (default value: false)"""
+
+    [<Test>]
+    let ``Help text for flag DU, non default`` () =
+        let getEnvVar (_ : string) = failwith "do not call"
+
+        let exc =
+            Assert.Throws<exn> (fun () -> WithFlagDu.parse' getEnvVar [ "--help" ] |> ignore<WithFlagDu>)
+
+        exc.Message
+        |> shouldEqual
+            """Help text requested.
+--dry-run  bool"""
+
+    let longFormCases =
+        let doTheThing =
+            [
+                [ "--do-something-else=foo" ]
+                [ "--anotherarg=foo" ]
+                [ "--do-something-else" ; "foo" ]
+                [ "--anotherarg" ; "foo" ]
+            ]
+
+        let someFlag =
+            [
+                [ "--turn-it-on" ], true
+                [ "--dont-turn-it-off" ], true
+                [ "--turn-it-on=true" ], true
+                [ "--dont-turn-it-off=true" ], true
+                [ "--turn-it-on=false" ], false
+                [ "--dont-turn-it-off=false" ], false
+                [ "--turn-it-on" ; "true" ], true
+                [ "--dont-turn-it-off" ; "true" ], true
+                [ "--turn-it-on" ; "false" ], false
+                [ "--dont-turn-it-off" ; "false" ], false
+            ]
+
+        List.allPairs doTheThing someFlag
+        |> List.map (fun (doTheThing, (someFlag, someFlagResult)) ->
+            let args = doTheThing @ someFlag
+
+            let expected =
+                {
+                    DoTheThing = "foo"
+                    SomeFlag = someFlagResult
+                }
+
+            args, expected
+        )
+        |> List.map TestCaseData
+
+    [<TestCaseSource(nameof longFormCases)>]
+    let ``Long-form args`` (args : string list, expected : ManyLongForms) =
+        let getEnvVar (_ : string) = failwith "do not call"
+
+        ManyLongForms.parse' getEnvVar args |> shouldEqual expected
+
+    [<Test>]
+    let ``Long-form args can't be referred to by their original name`` () =
+        let getEnvVar (_ : string) = failwith "do not call"
+
+        let exc =
+            Assert.Throws<exn> (fun () ->
+                ManyLongForms.parse' getEnvVar [ "--do-the-thing=foo" ] |> ignore<ManyLongForms>
+            )
+
+        exc.Message
+        |> shouldEqual """Unable to process argument --do-the-thing=foo as key --do-the-thing and value foo"""
+
+    [<Test>]
+    let ``Long-form args help text`` () =
+        let getEnvVar (_ : string) = failwith "do not call"
+
+        let exc =
+            Assert.Throws<exn> (fun () -> ManyLongForms.parse' getEnvVar [ "--help" ] |> ignore<ManyLongForms>)
+
+        exc.Message
+        |> shouldEqual
+            """Help text requested.
+--do-something-else / --anotherarg  string
+--turn-it-on / --dont-turn-it-off  bool"""

WoofWare.Myriad.Plugins.Test/WoofWare.Myriad.Plugins.Test.fsproj

@@ -4,6 +4,11 @@
     <TargetFramework>net8.0</TargetFramework>
     <IsPackable>false</IsPackable>
     <IsTestProject>true</IsTestProject>
+    <!--
+      Known high severity vulnerability
+      I have not yet seen a single instance where I care about this warning
+    -->
+    <NoWarn>$(NoWarn),NU1903</NoWarn>
   </PropertyGroup>
 
   <ItemGroup>
@@ -34,11 +39,11 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="ApiSurface" Version="4.0.44"/>
+    <PackageReference Include="ApiSurface" Version="4.1.5"/>
     <PackageReference Include="FsCheck" Version="2.16.6"/>
     <PackageReference Include="FsUnit" Version="6.0.0"/>
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.10.0"/>
-    <PackageReference Include="NUnit" Version="4.1.0"/>
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.11.1"/>
+    <PackageReference Include="NUnit" Version="4.2.2"/>
     <PackageReference Include="NUnit3TestAdapter" Version="4.6.0"/>
   </ItemGroup>
 

WoofWare.Myriad.Plugins/AstHelper.fs

@@ -67,41 +67,109 @@ type internal RecordType =
         Members : SynMemberDefns option
         XmlDoc : PreXmlDoc option
         Generics : SynTyparDecls option
-        Accessibility : SynAccess option
+        TypeAccessibility : SynAccess option
+        ImplAccessibility : SynAccess option
         Attributes : SynAttribute list
     }
 
     /// Parse from the AST.
-    static member OfRecord (record : SynTypeDefn) : RecordType =
-        let sci, sdr, smd, smdo =
-            match record with
-            | SynTypeDefn.SynTypeDefn (sci, sdr, smd, smdo, _, _) -> sci, sdr, smd, smdo
-
-        let synAccessOption, recordFields =
-            match sdr with
-            | SynTypeDefnRepr.Simple (SynTypeDefnSimpleRepr.Record (sa, fields, _), _) -> sa, fields
-            | _ -> failwith $"expected a record; got: %+A{record}"
-
+    static member OfRecord
+        (sci : SynComponentInfo)
+        (smd : SynMemberDefns)
+        (access : SynAccess option)
+        (recordFields : SynField list)
+        : RecordType
+        =
         match sci with
-        | SynComponentInfo.SynComponentInfo (attrs, typars, _, longId, doc, _, access, _) ->
-            if access <> synAccessOption then
-                failwith
-                    $"TODO what's happened, two different accessibility modifiers: %O{access} and %O{synAccessOption}"
-
-            match smdo with
-            | Some v -> failwith $"TODO what's happened, got a synMemberDefn of %O{v}"
-            | None -> ()
-
+        | SynComponentInfo.SynComponentInfo (attrs, typars, _, longId, doc, _, implAccess, _) ->
             {
                 Name = List.last longId
                 Fields = recordFields
                 Members = if smd.IsEmpty then None else Some smd
                 XmlDoc = if doc.IsEmpty then None else Some doc
                 Generics = typars
-                Accessibility = synAccessOption
+                ImplAccessibility = implAccess
+                TypeAccessibility = access
                 Attributes = attrs |> List.collect (fun l -> l.Attributes)
             }
 
+/// Methods for manipulating UnionCase.
+[<RequireQualifiedAccess>]
+module UnionCase =
+    /// Construct our structured `UnionCase` from an FCS `SynUnionCase`: extract everything
+    /// we care about from the AST representation.
+    let ofSynUnionCase (case : SynUnionCase) : UnionCase<Ident option> =
+        match case with
+        | SynUnionCase.SynUnionCase (attributes, ident, caseType, xmlDoc, access, _, _) ->
+
+        let ident =
+            match ident with
+            | SynIdent.SynIdent (ident, _) -> ident
+
+        let fields =
+            match caseType with
+            | SynUnionCaseKind.Fields cases -> cases
+            | SynUnionCaseKind.FullType _ -> failwith "unexpected FullType union"
+
+        {
+            Name = ident
+            XmlDoc = if xmlDoc.IsEmpty then None else Some xmlDoc
+            Access = access
+            Attributes = attributes |> List.collect (fun t -> t.Attributes)
+            Fields = fields |> List.map SynField.extract
+        }
+
+    /// Functorial `map`.
+    let mapIdentFields<'a, 'b> (f : 'a -> 'b) (unionCase : UnionCase<'a>) : UnionCase<'b> =
+        {
+            Attributes = unionCase.Attributes
+            Name = unionCase.Name
+            Access = unionCase.Access
+            XmlDoc = unionCase.XmlDoc
+            Fields = unionCase.Fields |> List.map (SynField.mapIdent f)
+        }
+
+/// Everything you need to know about a discriminated union definition.
+type internal UnionType =
+    {
+        /// The name of the DU: for example, `type Foo = | Blah` has this being `Foo`.
+        Name : Ident
+        /// Any additional members which are not union cases.
+        Members : SynMemberDefns option
+        /// Any docstring associated with the DU itself (not its cases).
+        XmlDoc : PreXmlDoc option
+        /// Generic type parameters this DU takes: `type Foo<'a> = | ...`.
+        Generics : SynTyparDecls option
+        /// Attributes of the DU (not its cases): `[<Attr>] type Foo = | ...`
+        Attributes : SynAttribute list
+        /// Accessibility modifier of the DU: `type private Foo = ...`
+        TypeAccessibility : SynAccess option
+        /// Accessibility modifier of the DU's implementation: `type Foo = private | ...`
+        ImplAccessibility : SynAccess option
+        /// The actual DU cases themselves.
+        Cases : UnionCase<Ident option> list
+    }
+
+    static member OfUnion
+        (sci : SynComponentInfo)
+        (smd : SynMemberDefns)
+        (access : SynAccess option)
+        (cases : SynUnionCase list)
+        : UnionType
+        =
+        match sci with
+        | SynComponentInfo.SynComponentInfo (attrs, typars, _, longId, doc, _, implAccess, _) ->
+            {
+                Name = List.last longId
+                Members = if smd.IsEmpty then None else Some smd
+                XmlDoc = if doc.IsEmpty then None else Some doc
+                Generics = typars
+                Attributes = attrs |> List.collect (fun l -> l.Attributes)
+                TypeAccessibility = access
+                ImplAccessibility = implAccess
+                Cases = cases |> List.map UnionCase.ofSynUnionCase
+            }
+
 /// Anything that is part of an ADT.
 /// A record is a product of stuff; this type represents one of those stuffs.
 type internal AdtNode =
@@ -144,13 +212,13 @@ module internal AstHelper =
     let defineRecordType (record : RecordType) : SynTypeDefn =
         let name =
             SynComponentInfo.create record.Name
-            |> SynComponentInfo.setAccessibility record.Accessibility
+            |> SynComponentInfo.setAccessibility record.TypeAccessibility
             |> match record.XmlDoc with
                | None -> id
                | Some doc -> SynComponentInfo.withDocString doc
             |> SynComponentInfo.setGenerics record.Generics
 
-        SynTypeDefnRepr.record (Seq.toList record.Fields)
+        SynTypeDefnRepr.recordWithAccess record.ImplAccessibility (Seq.toList record.Fields)
         |> SynTypeDefn.create name
         |> SynTypeDefn.withMemberDefns (defaultArg record.Members SynMemberDefns.Empty)
 

WoofWare.Myriad.Plugins/InterfaceMockGenerator.fs

@@ -212,7 +212,8 @@ module internal InterfaceMockGenerator =
                 Members = Some ([ constructor ; interfaceMembers ] @ extraInterfaces)
                 XmlDoc = Some xmlDoc
                 Generics = interfaceType.Generics
-                Accessibility = Some access
+                TypeAccessibility = Some access
+                ImplAccessibility = None
                 Attributes = []
             }
 

WoofWare.Myriad.Plugins/JsonParseGenerator.fs

@@ -416,11 +416,11 @@ module internal JsonParseGenerator =
     let createUnionMaker (spec : JsonParseOutputSpec) (typeName : LongIdent) (fields : UnionCase<Ident> list) =
         fields
         |> List.map (fun case ->
-            let propertyName = JsonSerializeGenerator.getPropertyName case.Ident case.Attrs
+            let propertyName = JsonSerializeGenerator.getPropertyName case.Name case.Attributes
 
             let body =
                 if case.Fields.IsEmpty then
-                    SynExpr.createLongIdent' (typeName @ [ case.Ident ])
+                    SynExpr.createLongIdent' (typeName @ [ case.Name ])
                 else
                     case.Fields
                     |> List.map (fun field ->
@@ -429,7 +429,7 @@ module internal JsonParseGenerator =
                         createParseRhs options propertyName field.Type
                     )
                     |> SynExpr.tuple
-                    |> SynExpr.applyFunction (SynExpr.createLongIdent' (typeName @ [ case.Ident ]))
+                    |> SynExpr.applyFunction (SynExpr.createLongIdent' (typeName @ [ case.Name ]))
                     |> SynExpr.createLet
                         [
                             SynExpr.index (SynExpr.CreateConst "data") (SynExpr.createIdent "node")
@@ -600,7 +600,7 @@ module internal JsonParseGenerator =
                     | Some i -> i
 
                 cases
-                |> List.map SynUnionCase.extract
+                |> List.map UnionCase.ofSynUnionCase
                 |> List.map (UnionCase.mapIdentFields optionGet)
                 |> createUnionMaker spec ident
             | SynTypeDefnRepr.Simple (SynTypeDefnSimpleRepr.Enum (cases, _range), _) ->

WoofWare.Myriad.Plugins/JsonSerializeGenerator.fs

@@ -263,11 +263,11 @@ module internal JsonSerializeGenerator =
 
     let unionModule (spec : JsonSerializeOutputSpec) (typeName : LongIdent) (cases : SynUnionCase list) =
         let inputArg = Ident.create "input"
-        let fields = cases |> List.map SynUnionCase.extract
+        let fields = cases |> List.map UnionCase.ofSynUnionCase
 
         fields
         |> List.map (fun unionCase ->
-            let propertyName = getPropertyName unionCase.Ident unionCase.Attrs
+            let propertyName = getPropertyName unionCase.Name unionCase.Attributes
 
             let caseNames = unionCase.Fields |> List.mapi (fun i _ -> $"arg%i{i}")
 
@@ -275,7 +275,7 @@ module internal JsonSerializeGenerator =
 
             let pattern =
                 SynPat.LongIdent (
-                    SynLongIdent.create (typeName @ [ unionCase.Ident ]),
+                    SynLongIdent.create (typeName @ [ unionCase.Name ]),
                     None,
                     None,
                     argPats,

WoofWare.Myriad.Plugins/RemoveOptionsGenerator.fs

@@ -36,7 +36,6 @@ module internal RemoveOptionsGenerator =
             trivia
         )
 
-    // TODO: this option seems a bit odd
     let createType
         (xmlDoc : PreXmlDoc option)
         (accessibility : SynAccess option)
@@ -54,7 +53,8 @@ module internal RemoveOptionsGenerator =
                 Members = None
                 XmlDoc = xmlDoc
                 Generics = generics
-                Accessibility = accessibility
+                TypeAccessibility = accessibility
+                ImplAccessibility = None
                 Attributes = []
             }
 
@@ -62,7 +62,7 @@ module internal RemoveOptionsGenerator =
 
         SynModuleDecl.Types ([ typeDecl ], range0)
 
-    let createMaker (withOptionsType : LongIdent) (withoutOptionsType : LongIdent) (fields : SynFieldData<Ident> list) =
+    let createMaker (withOptionsType : LongIdent) (withoutOptionsType : Ident) (fields : SynFieldData<Ident> list) =
         let xmlDoc = PreXmlDoc.create "Remove the optional members of the input."
 
         let inputArg = Ident.create "input"
@@ -87,7 +87,7 @@ module internal RemoveOptionsGenerator =
                             SynExpr.applyFunction
                                 (SynExpr.createLongIdent [ "Option" ; "defaultWith" ])
                                 (SynExpr.createLongIdent' (
-                                    withoutOptionsType
+                                    [ withoutOptionsType ]
                                     @ [ Ident.create (sprintf "Default%s" fieldData.Ident.idText) ]
                                 ))
                         )
@@ -101,47 +101,35 @@ module internal RemoveOptionsGenerator =
             [ functionName ]
             [
                 SynPat.named inputArg.idText
-                |> SynPat.annotateType (SynType.LongIdent (SynLongIdent.create withoutOptionsType))
+                |> SynPat.annotateType (SynType.LongIdent (SynLongIdent.createI withoutOptionsType))
             ]
             body
         |> SynBinding.withXmlDoc xmlDoc
         |> SynBinding.withReturnAnnotation (SynType.LongIdent (SynLongIdent.create withOptionsType))
         |> SynModuleDecl.createLet
 
-    let createRecordModule (namespaceId : LongIdent) (typeDefn : SynTypeDefn) =
-        let (SynTypeDefn (synComponentInfo, synTypeDefnRepr, _members, _implicitCtor, _, _)) =
-            typeDefn
+    let createRecordModule (namespaceId : LongIdent) (typeDefn : RecordType) =
+        let fieldData = typeDefn.Fields |> List.map SynField.extractWithIdent
 
-        let (SynComponentInfo (_attributes, typeParams, _constraints, recordId, doc, _preferPostfix, _access, _)) =
-            synComponentInfo
+        let decls =
+            [
+                createType typeDefn.XmlDoc typeDefn.TypeAccessibility typeDefn.Generics typeDefn.Fields
+                createMaker [ Ident.create "Short" ] typeDefn.Name fieldData
+            ]
 
-        match synTypeDefnRepr with
-        | SynTypeDefnRepr.Simple (SynTypeDefnSimpleRepr.Record (accessibility, fields, _range), _) ->
-            let fieldData = fields |> List.map SynField.extractWithIdent
+        let xmlDoc =
+            sprintf "Module containing an option-truncated version of the %s type" typeDefn.Name.idText
+            |> PreXmlDoc.create
 
-            let decls =
-                [
-                    createType (Some doc) accessibility typeParams fields
-                    createMaker [ Ident.create "Short" ] recordId fieldData
-                ]
+        let info =
+            SynComponentInfo.create typeDefn.Name
+            |> SynComponentInfo.withDocString xmlDoc
+            |> SynComponentInfo.addAttributes [ SynAttribute.compilationRepresentation ]
+            |> SynComponentInfo.addAttributes [ SynAttribute.requireQualifiedAccess ]
 
-            let xmlDoc =
-                recordId
-                |> Seq.map (fun i -> i.idText)
-                |> String.concat "."
-                |> sprintf "Module containing an option-truncated version of the %s type"
-                |> PreXmlDoc.create
-
-            let info =
-                SynComponentInfo.createLong recordId
-                |> SynComponentInfo.withDocString xmlDoc
-                |> SynComponentInfo.addAttributes [ SynAttribute.compilationRepresentation ]
-                |> SynComponentInfo.addAttributes [ SynAttribute.requireQualifiedAccess ]
-
-            SynModuleDecl.nestedModule info decls
-            |> List.singleton
-            |> SynModuleOrNamespace.createNamespace namespaceId
-        | _ -> failwithf "Not a record type"
+        SynModuleDecl.nestedModule info decls
+        |> List.singleton
+        |> SynModuleOrNamespace.createNamespace namespaceId
 
 open Myriad.Core
 
@@ -164,7 +152,24 @@ type RemoveOptionsGenerator () =
                 |> List.choose (fun (ns, types) ->
                     match types |> List.filter Ast.hasAttribute<RemoveOptionsAttribute> with
                     | [] -> None
-                    | types -> Some (ns, types)
+                    | types ->
+                        let types =
+                            types
+                            |> List.map (fun ty ->
+                                match ty with
+                                | SynTypeDefn.SynTypeDefn (sci,
+                                                           SynTypeDefnRepr.Simple (SynTypeDefnSimpleRepr.Record (access,
+                                                                                                                 fields,
+                                                                                                                 _),
+                                                                                   _),
+                                                           smd,
+                                                           smdo,
+                                                           _,
+                                                           _) -> RecordType.OfRecord sci smd access fields
+                                | _ -> failwith "unexpectedly not a record"
+                            )
+
+                        Some (ns, types)
                 )
 
             let modules =

WoofWare.Myriad.Plugins/SurfaceBaseline.txt

@@ -11,4 +11,27 @@ WoofWare.Myriad.Plugins.JsonParseGenerator..ctor [constructor]: unit
 WoofWare.Myriad.Plugins.JsonSerializeGenerator inherit obj, implements Myriad.Core.IMyriadGenerator
 WoofWare.Myriad.Plugins.JsonSerializeGenerator..ctor [constructor]: unit
 WoofWare.Myriad.Plugins.RemoveOptionsGenerator inherit obj, implements Myriad.Core.IMyriadGenerator
-WoofWare.Myriad.Plugins.RemoveOptionsGenerator..ctor [constructor]: unit
+WoofWare.Myriad.Plugins.RemoveOptionsGenerator..ctor [constructor]: unit
+WoofWare.Myriad.Plugins.SynFieldData`1 inherit obj
+WoofWare.Myriad.Plugins.SynFieldData`1..ctor [constructor]: (Fantomas.FCS.Syntax.SynAttribute list, 'Ident, Fantomas.FCS.Syntax.SynType)
+WoofWare.Myriad.Plugins.SynFieldData`1.Attrs [property]: [read-only] Fantomas.FCS.Syntax.SynAttribute list
+WoofWare.Myriad.Plugins.SynFieldData`1.get_Attrs [method]: unit -> Fantomas.FCS.Syntax.SynAttribute list
+WoofWare.Myriad.Plugins.SynFieldData`1.get_Ident [method]: unit -> 'Ident
+WoofWare.Myriad.Plugins.SynFieldData`1.get_Type [method]: unit -> Fantomas.FCS.Syntax.SynType
+WoofWare.Myriad.Plugins.SynFieldData`1.Ident [property]: [read-only] 'Ident
+WoofWare.Myriad.Plugins.SynFieldData`1.Type [property]: [read-only] Fantomas.FCS.Syntax.SynType
+WoofWare.Myriad.Plugins.UnionCase inherit obj
+WoofWare.Myriad.Plugins.UnionCase.mapIdentFields [static method]: ('a -> 'b) -> 'a WoofWare.Myriad.Plugins.UnionCase -> 'b WoofWare.Myriad.Plugins.UnionCase
+WoofWare.Myriad.Plugins.UnionCase.ofSynUnionCase [static method]: Fantomas.FCS.Syntax.SynUnionCase -> Fantomas.FCS.Syntax.Ident option WoofWare.Myriad.Plugins.UnionCase
+WoofWare.Myriad.Plugins.UnionCase`1 inherit obj
+WoofWare.Myriad.Plugins.UnionCase`1..ctor [constructor]: (Fantomas.FCS.Syntax.Ident, Fantomas.FCS.Xml.PreXmlDoc option, Fantomas.FCS.Syntax.SynAccess option, Fantomas.FCS.Syntax.SynAttribute list, 'ident WoofWare.Myriad.Plugins.SynFieldData list)
+WoofWare.Myriad.Plugins.UnionCase`1.Access [property]: [read-only] Fantomas.FCS.Syntax.SynAccess option
+WoofWare.Myriad.Plugins.UnionCase`1.Attributes [property]: [read-only] Fantomas.FCS.Syntax.SynAttribute list
+WoofWare.Myriad.Plugins.UnionCase`1.Fields [property]: [read-only] 'ident WoofWare.Myriad.Plugins.SynFieldData list
+WoofWare.Myriad.Plugins.UnionCase`1.get_Access [method]: unit -> Fantomas.FCS.Syntax.SynAccess option
+WoofWare.Myriad.Plugins.UnionCase`1.get_Attributes [method]: unit -> Fantomas.FCS.Syntax.SynAttribute list
+WoofWare.Myriad.Plugins.UnionCase`1.get_Fields [method]: unit -> 'ident WoofWare.Myriad.Plugins.SynFieldData list
+WoofWare.Myriad.Plugins.UnionCase`1.get_Name [method]: unit -> Fantomas.FCS.Syntax.Ident
+WoofWare.Myriad.Plugins.UnionCase`1.get_XmlDoc [method]: unit -> Fantomas.FCS.Xml.PreXmlDoc option
+WoofWare.Myriad.Plugins.UnionCase`1.Name [property]: [read-only] Fantomas.FCS.Syntax.Ident
+WoofWare.Myriad.Plugins.UnionCase`1.XmlDoc [property]: [read-only] Fantomas.FCS.Xml.PreXmlDoc option

WoofWare.Myriad.Plugins/SynExpr/SynField.fs

@@ -5,10 +5,17 @@ open Fantomas.FCS.Syntax
 open Fantomas.FCS.SyntaxTrivia
 open Fantomas.FCS.Xml
 
-type internal SynFieldData<'Ident> =
+/// The data needed to reconstitute a single piece of data within a union field, or a single record field.
+/// This is generic on whether the field is identified. For example, in `type Foo = Blah of int`, the `int`
+/// field is not identified; whereas in `type Foo = Blah of baz : int`, it is identified.
+type SynFieldData<'Ident> =
     {
+        /// Attributes on this field. I think you can only get these if this is a *record* field.
         Attrs : SynAttribute list
+        /// The identifier of this field (see docstring for SynFieldData).
         Ident : 'Ident
+        /// The type of the data contained in this field. For example, `type Foo = { Blah : int }`
+        /// has this being `int`.
         Type : SynType
     }
 

WoofWare.Myriad.Plugins/SynExpr/SynType.fs

@@ -363,6 +363,7 @@ module internal SynType =
         | DateTimeOffset -> "DateTimeOffset"
         | DateOnly -> "DateOnly"
         | TimeSpan -> "TimeSpan"
+        | SynType.LongIdent (SynLongIdent.SynLongIdent (ident, _, _)) -> ident |> List.map _.idText |> String.concat "."
         | ty -> failwithf "could not compute human-readable string for type: %O" ty
 
     /// Guess whether the types are equal. We err on the side of saying "no, they're different".
@@ -454,4 +455,11 @@ module internal SynType =
             match ty2 with
             | DateOnly -> true
             | _ -> false
-        | _ -> false
+        | _ ->
+
+        match ty1, ty2 with
+        | SynType.LongIdent (SynLongIdent (ident1, _, _)), SynType.LongIdent (SynLongIdent (ident2, _, _)) ->
+            let ident1 = ident1 |> List.map _.idText
+            let ident2 = ident2 |> List.map _.idText
+            ident1 = ident2
+        | _, _ -> false

WoofWare.Myriad.Plugins/SynExpr/SynTypeDefnRepr.fs

@@ -13,8 +13,12 @@ module internal SynTypeDefnRepr =
     let inline augmentation () : SynTypeDefnRepr =
         SynTypeDefnRepr.ObjectModel (SynTypeDefnKind.Augmentation range0, [], range0)
 
-    let inline union (cases : SynUnionCase list) : SynTypeDefnRepr =
-        SynTypeDefnRepr.Simple (SynTypeDefnSimpleRepr.Union (None, cases, range0), range0)
+    let inline unionWithAccess (implAccess : SynAccess option) (cases : SynUnionCase list) : SynTypeDefnRepr =
+        SynTypeDefnRepr.Simple (SynTypeDefnSimpleRepr.Union (implAccess, cases, range0), range0)
 
-    let inline record (fields : SynField list) : SynTypeDefnRepr =
-        SynTypeDefnRepr.Simple (SynTypeDefnSimpleRepr.Record (None, fields, range0), range0)
+    let inline union (cases : SynUnionCase list) : SynTypeDefnRepr = unionWithAccess None cases
+
+    let inline recordWithAccess (implAccess : SynAccess option) (fields : SynField list) : SynTypeDefnRepr =
+        SynTypeDefnRepr.Simple (SynTypeDefnSimpleRepr.Record (implAccess, fields, range0), range0)
+
+    let inline record (fields : SynField list) : SynTypeDefnRepr = recordWithAccess None fields

WoofWare.Myriad.Plugins/SynExpr/SynUnionCase.fs

@@ -5,44 +5,24 @@ open Fantomas.FCS.Text.Range
 open Fantomas.FCS.Xml
 open Fantomas.FCS.SyntaxTrivia
 
-type internal UnionCase<'Ident> =
+/// Represents everything you need to know about a union case.
+/// This is generic on whether each field of this case must be named.
+type UnionCase<'ident> =
     {
-        Fields : SynFieldData<'Ident> list
-        Attrs : SynAttribute list
-        Ident : Ident
+        /// The name of the case: e.g. `| Foo of blah` has this being `Foo`.
+        Name : Ident
+        /// Any docstring associated with this case.
+        XmlDoc : PreXmlDoc option
+        /// Any accessibility modifier: e.g. `type Foo = private | Blah`.
+        Access : SynAccess option
+        /// Attributes on the case: for example, `| [<Attr>] Foo of blah`.
+        Attributes : SynAttribute list
+        /// The data contained within the case: for example, `[blah]` in `| Foo of blah`.
+        Fields : SynFieldData<'ident> list
     }
 
-[<RequireQualifiedAccess>]
-module internal UnionCase =
-    let mapIdentFields<'a, 'b> (f : 'a -> 'b) (unionCase : UnionCase<'a>) : UnionCase<'b> =
-        {
-            Fields = unionCase.Fields |> List.map (SynField.mapIdent f)
-            Attrs = unionCase.Attrs
-            Ident = unionCase.Ident
-        }
-
 [<RequireQualifiedAccess>]
 module internal SynUnionCase =
-    let extract (SynUnionCase (attrs, id, caseType, _, _, _, _)) : UnionCase<Ident option> =
-        match caseType with
-        | SynUnionCaseKind.FullType _ -> failwith "WoofWare.Myriad does not support FullType union cases."
-        | SynUnionCaseKind.Fields fields ->
-
-        let fields = fields |> List.map SynField.extract
-
-        let id =
-            match id with
-            | SynIdent.SynIdent (ident, _) -> ident
-
-        // As far as I can tell, there's no way to get any attributes here? :shrug:
-        let attrs = attrs |> List.collect (fun l -> l.Attributes)
-
-        {
-            Fields = fields
-            Attrs = attrs
-            Ident = id
-        }
-
     let create (case : UnionCase<Ident>) : SynUnionCase =
         let fields =
             case.Fields
@@ -63,11 +43,11 @@ module internal SynUnionCase =
             )
 
         SynUnionCase.SynUnionCase (
-            SynAttributes.ofAttrs case.Attrs,
-            SynIdent.SynIdent (case.Ident, None),
+            SynAttributes.ofAttrs case.Attributes,
+            SynIdent.SynIdent (case.Name, None),
             SynUnionCaseKind.Fields fields,
-            PreXmlDoc.Empty,
-            None,
+            case.XmlDoc |> Option.defaultValue PreXmlDoc.Empty,
+            case.Access,
             range0,
             {
                 BarRange = Some range0

WoofWare.Myriad.Plugins/Teq.fs

@@ -0,0 +1,18 @@
+namespace WoofWare.Myriad.Plugins
+
+// Extracted from https://github.com/G-Research/TypeEquality
+// which is Apache-2.0 licenced. See `TeqLicence.txt`.
+// We inline this code because Myriad doesn't seem to reliably load package references in the generator.
+// I have reformatted a little, and stripped out all the code I don't use.
+
+type internal Teq<'a, 'b> = private | Teq of ('a -> 'b) * ('b -> 'a)
+
+[<RequireQualifiedAccess>]
+module internal Teq =
+
+    let refl<'a> : Teq<'a, 'a> = Teq (id, id)
+    let cast (Teq (f, _)) a = f a
+
+    [<RequireQualifiedAccess>]
+    module Cong =
+        let believeMe<'a, 'b, 'a2, 'b2> (_ : Teq<'a, 'b>) : Teq<'a2, 'b2> = unbox <| (refl : Teq<'a2, 'a2>)

WoofWare.Myriad.Plugins/TeqLicence.txt

@@ -0,0 +1,201 @@
+Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
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+      by You to the Licensor shall be under the terms and conditions of
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+      the terms of any separate license agreement you may have executed
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+   limitations under the License.

WoofWare.Myriad.Plugins/WoofWare.Myriad.Plugins.fsproj

@@ -25,6 +25,7 @@
 
   <ItemGroup>
     <Compile Include="List.fs"/>
+    <Compile Include="Teq.fs" />
     <Compile Include="Primitives.fs" />
     <Compile Include="SynExpr\SynAttributes.fs" />
     <Compile Include="SynExpr\PreXmlDoc.fs" />
@@ -56,6 +57,7 @@
     <Compile Include="HttpClientGenerator.fs"/>
     <Compile Include="CataGenerator.fs" />
     <Compile Include="ArgParserGenerator.fs" />
+    <None Include="TeqLicence.txt" />
     <EmbeddedResource Include="version.json"/>
     <EmbeddedResource Include="SurfaceBaseline.txt"/>
     <None Include="..\README.md">

WoofWare.Myriad.Plugins/version.json

@@ -1,5 +1,5 @@
 {
-  "version": "2.2",
+  "version": "2.3",
   "publicReleaseRefSpec": [
     "^refs/heads/main$"
   ],

analyzers/analyzers.fsproj

@@ -10,7 +10,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageDownload Include="G-Research.FSharp.Analyzers" Version="[0.10.0]" />
+    <PackageDownload Include="G-Research.FSharp.Analyzers" Version="[0.11.0]" />
   </ItemGroup>
 
 </Project>

flake.lock

@@ -20,11 +20,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1724395761,
-        "narHash": "sha256-zRkDV/nbrnp3Y8oCADf5ETl1sDrdmAW6/bBVJ8EbIdQ=",
+        "lastModified": 1725534445,
+        "narHash": "sha256-Yd0FK9SkWy+ZPuNqUgmVPXokxDgMJoGuNpMEtkfcf84=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "ae815cee91b417be55d43781eb4b73ae1ecc396c",
+        "rev": "9bb1e7571aadf31ddb4af77fc64b2d59580f9a39",
         "type": "github"
       },
       "original": {

global.json

@@ -1,6 +1,6 @@
 {
   "sdk": {
     "version": "8.0.100",
-    "rollForward": "latestFeature"
+    "rollForward": "latestMajor"
   }
 }

nix/deps.nix

@@ -3,13 +3,13 @@
 {fetchNuGet}: [
   (fetchNuGet {
     pname = "ApiSurface";
-    version = "4.0.44";
-    hash = "sha256-1su3UcdsyG9OoPwiMqo07rUMKhkVKlohRK4fA8mbxvI=";
+    version = "4.1.5";
+    hash = "sha256-Kbt18XLk1gvZfzGca885HaXZB119APay85KzI546PYM=";
   })
   (fetchNuGet {
     pname = "fantomas";
-    version = "6.3.10";
-    hash = "sha256-2m4YevDp9CRm/Ci2hguDXd6DUMElRg3hNAne9LHntWM=";
+    version = "6.3.12";
+    hash = "sha256-LFZn2cO72FlsmLI0vTLz52Bn4XBeGILTOr8rz/EuXeg=";
   })
   (fetchNuGet {
     pname = "Fantomas.Core";
@@ -28,8 +28,8 @@
   })
   (fetchNuGet {
     pname = "fsharp-analyzers";
-    version = "0.26.1";
-    hash = "sha256-UqSK8PoXRJMZWKphMmWpl5klVn82EM1VczNZ1AOZ6Sw=";
+    version = "0.27.0";
+    hash = "sha256-QhLi2veTY1wZlQKJLTyVPgx/ImkaZugQNjSN5VJCNEA=";
   })
   (fetchNuGet {
     pname = "FSharp.Core";
@@ -43,8 +43,8 @@
   })
   (fetchNuGet {
     pname = "FSharp.Core";
-    version = "8.0.301";
-    hash = "sha256-LyP+zHxXFNksSQ/ExQ9CGkQYGvld8W6JNmxMg6lTRCs=";
+    version = "8.0.400";
+    hash = "sha256-wlrcAjjvI5YtnHR7kFH8uRUA4GomJYmqr41K5LYjCGs=";
   })
   (fetchNuGet {
     pname = "FsUnit";
@@ -53,83 +53,83 @@
   })
   (fetchNuGet {
     pname = "Microsoft.AspNetCore.App.Ref";
-    version = "6.0.32";
-    hash = "sha256-1mQTxwruzhm20YdlZefrYuy7xrBs17pH4Vo0K3Tl7Fc=";
+    version = "6.0.33";
+    hash = "sha256-GcPiO+iI0JsHYlqURAmzWjOnDX2jDCUY4jYaIwr8ojs=";
   })
   (fetchNuGet {
     pname = "Microsoft.AspNetCore.App.Runtime.linux-arm64";
-    version = "6.0.32";
-    hash = "sha256-cIe0F+7rgwYSmh0VuFuQsUI9iEW5hn2KCD2H8Cs/k2g=";
+    version = "6.0.33";
+    hash = "sha256-g5zbB1DnCSKuCOWtF09GEqGn1uJLdlTN6kqdnSCzRjQ=";
   })
   (fetchNuGet {
     pname = "Microsoft.AspNetCore.App.Runtime.linux-x64";
-    version = "6.0.32";
-    hash = "sha256-TkYv7h9NBr3I+FIaXeLU4MawJtgT2RWhs35ewGRDKx8=";
+    version = "6.0.33";
+    hash = "sha256-ToaiqVy5qonomAVBg5PO1GgrPKL4Cc1BZTJ0z/2LquA=";
   })
   (fetchNuGet {
     pname = "Microsoft.AspNetCore.App.Runtime.osx-arm64";
-    version = "6.0.32";
-    hash = "sha256-RaC37ZQcJn7ykXJrtV7ibxh0GcalRyPKncxlqOLou+I=";
+    version = "6.0.33";
+    hash = "sha256-OY/vdqAzZ99I4lEZbOOQw12TE0AIb5pXxKTvDxO2M2Q=";
   })
   (fetchNuGet {
     pname = "Microsoft.AspNetCore.App.Runtime.osx-x64";
-    version = "6.0.32";
-    hash = "sha256-vh/e46xM/HbhbBvL5eP5/DCHwCP2Bg7WoMS28nBXWV0=";
+    version = "6.0.33";
+    hash = "sha256-53MAV3RO1kXzy5IpdZDZIOhoUzFqWHn7+A3aWwdTONQ=";
   })
   (fetchNuGet {
     pname = "Microsoft.CodeCoverage";
-    version = "17.10.0";
-    hash = "sha256-yQFwqVChRtIRpbtkJr92JH2i+O7xn91NGbYgnKs8G2g=";
+    version = "17.11.1";
+    hash = "sha256-1dLlK3NGh88PuFYZiYpT+izA96etxhU3BSgixDgdtGA=";
   })
   (fetchNuGet {
     pname = "Microsoft.NET.Test.Sdk";
-    version = "17.10.0";
-    hash = "sha256-rkHIqB2mquNXF89XBTFpUL2z5msjTBsOcyjSBCh36I0=";
+    version = "17.11.1";
+    hash = "sha256-0JUEucQ2lzaPgkrjm/NFLBTbqU1dfhvhN3Tl3moE6mI=";
   })
   (fetchNuGet {
     pname = "Microsoft.NETCore.App.Host.linux-arm64";
-    version = "6.0.32";
-    hash = "sha256-yDOkSHEGuGG6u+rB5u+IC3rc2tQwvbjdqmgHcl7Gkn4=";
+    version = "6.0.33";
+    hash = "sha256-rwWOpf2Pdg84c8bKIUcMYuDTI0kXUELL/nl9psSmX+E=";
   })
   (fetchNuGet {
     pname = "Microsoft.NETCore.App.Host.linux-x64";
-    version = "6.0.32";
-    hash = "sha256-2aDGkn0QqXXHUUSAwtQQbjKl5I6S0fcQWPciqPnOiM4=";
+    version = "6.0.33";
+    hash = "sha256-5iYNZATXOePDsLA9lI80o1Gjxw4E+B4bJbwdYJJHcZY=";
   })
   (fetchNuGet {
     pname = "Microsoft.NETCore.App.Host.osx-arm64";
-    version = "6.0.32";
-    hash = "sha256-n6hks4j88TRelq1O6SCeUH5GmxoSm5BWXGwnpnYJibI=";
+    version = "6.0.33";
+    hash = "sha256-k3LenomOlacyzq4FlBY/TwV7+ClbK4U0A/O9r0pZHT4=";
   })
   (fetchNuGet {
     pname = "Microsoft.NETCore.App.Host.osx-x64";
-    version = "6.0.32";
-    hash = "sha256-nBBq4RYAgimBYOn/bN6JTFvJFYaqYXMHae2pmCzRaS8=";
+    version = "6.0.33";
+    hash = "sha256-tu72AwDH1+oAIXjOJcNbeyKm1s4pncYp0avbMSBrcJQ=";
   })
   (fetchNuGet {
     pname = "Microsoft.NETCore.App.Ref";
-    version = "6.0.32";
-    hash = "sha256-Fm3RUZNcro434rIu3c7unGviGeGBjXj2dGnr2mmrM2g=";
+    version = "6.0.33";
+    hash = "sha256-BiGUcXo1FQTlZdR6ndhUQ8lrYG3KaGXNXRVF+Fc3L28=";
   })
   (fetchNuGet {
     pname = "Microsoft.NETCore.App.Runtime.linux-arm64";
-    version = "6.0.32";
-    hash = "sha256-kdj8ia/2du2oKGg4MJdO2XytpT3gQ9UOiHVCyfiX2V8=";
+    version = "6.0.33";
+    hash = "sha256-obRKiJEVpZ5E3TE7q2oHaYwFYhI23rMiHwp+8ORkwXY=";
   })
   (fetchNuGet {
     pname = "Microsoft.NETCore.App.Runtime.linux-x64";
-    version = "6.0.32";
-    hash = "sha256-/Hti30Ba12NDJQcG8pFTg6REVUDIrxZ/hRtEZNDlgxE=";
+    version = "6.0.33";
+    hash = "sha256-2xdhvnKsFc8utDWN09zeXzZ5op+WUqkoWLuzdtQAkrA=";
   })
   (fetchNuGet {
     pname = "Microsoft.NETCore.App.Runtime.osx-arm64";
-    version = "6.0.32";
-    hash = "sha256-A8MFGOMXFROH1QGUE7xzq5b5EskDyIQCQt7SLfGdSbU=";
+    version = "6.0.33";
+    hash = "sha256-9KHubWicibZOcixiByzuBKPnJM2u5DSQC9jR3MAR1bI=";
   })
   (fetchNuGet {
     pname = "Microsoft.NETCore.App.Runtime.osx-x64";
-    version = "6.0.32";
-    hash = "sha256-y5YB62WlMrK10bR/+nNpI8luVRlD9W9ZG3GsX7AXzUM=";
+    version = "6.0.33";
+    hash = "sha256-smh6SiTtCAuFglqWrXiGGsoIDP9dhGuIKdYjmw+xCyY=";
   })
   (fetchNuGet {
     pname = "Microsoft.NETCore.Platforms";
@@ -153,13 +153,13 @@
   })
   (fetchNuGet {
     pname = "Microsoft.TestPlatform.ObjectModel";
-    version = "17.10.0";
-    hash = "sha256-3YjVGK2zEObksBGYg8b/CqoJgLQ1jUv4GCWNjDhLRh4=";
+    version = "17.11.1";
+    hash = "sha256-5vX+vCzFY3S7xfMVIv8OlMMFtdedW9UIJzc0WEc+vm4=";
   })
   (fetchNuGet {
     pname = "Microsoft.TestPlatform.TestHost";
-    version = "17.10.0";
-    hash = "sha256-+yzP3FY6WoOosSpYnB7duZLhOPUZMQYy8zJ1d3Q4hK4=";
+    version = "17.11.1";
+    hash = "sha256-wSkY0H1fQAq0H3LcKT4u7Y5RzhAAPa6yueVN84g8HxU=";
   })
   (fetchNuGet {
     pname = "Myriad.Core";
@@ -173,8 +173,8 @@
   })
   (fetchNuGet {
     pname = "Nerdbank.GitVersioning";
-    version = "3.6.141";
-    hash = "sha256-i1pBJ12vlPmde6qSQK4PG2QLSpjaUCoY+odTi24R5XI=";
+    version = "3.6.143";
+    hash = "sha256-OhOtMzP+2obDIR+npR7SsoXo0KrmcsL+VCE8Z3t5gzQ=";
   })
   (fetchNuGet {
     pname = "NETStandard.Library";
@@ -193,38 +193,38 @@
   })
   (fetchNuGet {
     pname = "NuGet.Common";
-    version = "6.10.1";
-    hash = "sha256-2gZe1zwSaZsr0nipaMBJixLEVOvR7vp75kwecSSYyfw=";
+    version = "6.11.0";
+    hash = "sha256-eb7G07RyZv4AQT6ItRqdBuUf9e9BXcQygsy5RNEXfNE=";
   })
   (fetchNuGet {
     pname = "NuGet.Configuration";
-    version = "6.10.1";
-    hash = "sha256-RmjvlbtJssxuWEiOcVJLtUVT0nPn7IUPb878NmJbwmM=";
+    version = "6.11.0";
+    hash = "sha256-2SNZkX64SB15glzQx3k+vI7btr8Yqg4CayaaaK1B0AQ=";
   })
   (fetchNuGet {
     pname = "NuGet.Frameworks";
-    version = "6.10.1";
-    hash = "sha256-AdfpuVDDy9zYAGgcMZoTf/fkFCJJVrxRFhsv6AI4Dd0=";
+    version = "6.11.0";
+    hash = "sha256-8DC7V2IlCjiMDQ9yWbl7QQHia6OpBrbWh5rL0qa0Opw=";
   })
   (fetchNuGet {
     pname = "NuGet.Packaging";
-    version = "6.10.1";
-    hash = "sha256-ogsVjOao+LKUOMhGir1flDuMPjOeR2OpkNGHtr/riH4=";
+    version = "6.11.0";
+    hash = "sha256-LVLvxcB6SMdayxAsrc5bCuLLt25fqPr6KfYcYoWWIQk=";
   })
   (fetchNuGet {
     pname = "NuGet.Protocol";
-    version = "6.10.1";
-    hash = "sha256-UeS/10z1EqswbeB0c7QgBIVOp0VGlN5ZDQqTY2/AhX8=";
+    version = "6.11.0";
+    hash = "sha256-3vdB/8IiJ2LMHhFXLWOzf0H59Ow/zcoq6W4uCHbihCQ=";
   })
   (fetchNuGet {
     pname = "NuGet.Versioning";
-    version = "6.10.1";
-    hash = "sha256-jOh27AORk0TIhVePDVAgVhh6FuUo2v3oh/Xapcw7UVI=";
+    version = "6.11.0";
+    hash = "sha256-03edgWvbqUtbzpBBTIxTwsSRoj1T2muGVL+vTuIHXag=";
   })
   (fetchNuGet {
     pname = "NUnit";
-    version = "4.1.0";
-    hash = "sha256-srzj0lf2ReKw41TnigZwf8rqKKNzGRRVrgN3hR/vRjo=";
+    version = "4.2.2";
+    hash = "sha256-+0OS67ITalmG9arYCgQF/+YbmPRnB3pIIykew0kvoCc=";
   })
   (fetchNuGet {
     pname = "NUnit3TestAdapter";