State and result of methods switch/map can be a ref struct

Directory.Build.props

@@ -12,7 +12,7 @@
       <RepositoryUrl>https://github.com/PawelGerr/Thinktecture.Runtime.Extensions</RepositoryUrl>
       <GenerateAssemblyCompanyAttribute>false</GenerateAssemblyCompanyAttribute>
       <RootNamespace>Thinktecture</RootNamespace>
-      <TargetFrameworks>net7.0;net8.0</TargetFrameworks>
+      <TargetFramework>net7.0</TargetFramework>
       <LangVersion>13.0</LangVersion>
       <ManagePackageVersionsCentrally>true</ManagePackageVersionsCentrally> 
       <Nullable>enable</Nullable>

samples/Directory.Build.props

@@ -7,7 +7,7 @@
    <Import Condition=" exists('$(ParentPropsFile)') " Project="$(ParentPropsFile)" />
 
    <PropertyGroup>
-       <TargetFrameworks>net9.0</TargetFrameworks>
+       <TargetFramework>net9.0</TargetFramework>
       <NoWarn>$(NoWarn);CS1591;CA1052;CA1062;CA1303;CA1707;CA1801;CA2000;NU1903</NoWarn>
       <IsPackable>false</IsPackable>
       <ImplicitUsings>disable</ImplicitUsings>

src/Thinktecture.Runtime.Extensions.EntityFrameworkCore8/Thinktecture.Runtime.Extensions.EntityFrameworkCore8.csproj

@@ -4,7 +4,7 @@
         <Description>Extends Entity Framework Core to support some components from Thinktecture.Runtime.Extensions.</Description>
         <PackageTags>common;EntityFrameworkCore</PackageTags>
         <DefineConstants>$(DefineConstants);COMPLEX_TYPES</DefineConstants>
-        <TargetFrameworks>net8.0</TargetFrameworks>
+        <TargetFramework>net8.0</TargetFramework>
     </PropertyGroup>
 
     <ItemGroup>

src/Thinktecture.Runtime.Extensions.EntityFrameworkCore9/Thinktecture.Runtime.Extensions.EntityFrameworkCore9.csproj

@@ -4,7 +4,7 @@
         <Description>Extends Entity Framework Core to support some components from Thinktecture.Runtime.Extensions.</Description>
         <PackageTags>common;EntityFrameworkCore</PackageTags>
         <DefineConstants>$(DefineConstants);COMPLEX_TYPES</DefineConstants>
-        <TargetFrameworks>net8.0</TargetFrameworks>
+        <TargetFramework>net8.0</TargetFramework>
     </PropertyGroup>
 
     <ItemGroup>

src/Thinktecture.Runtime.Extensions.SourceGenerator/CodeAnalysis/AdHocUnions/AdHocUnionCodeGenerator.cs

@@ -447,7 +447,17 @@ private void GenerateSwitchForAction(bool withState, bool isPartially)
             _sb.Append(" = null");
       }
 
-      _sb.Append(@")
+      _sb.Append(")");
+
+      if (withState)
+      {
+         _sb.Append(@"
+#if NET9_0_OR_GREATER
+		where TState : allows ref struct
+#endif");
+      }
+
+      _sb.Append(@"
       {");
 
       GenerateIndexBasedActionSwitchBody(withState, isPartially);
@@ -598,6 +608,17 @@ private void GenerateSwitchForFunc(bool withState, bool isPartially)
       }
 
       _sb.Append(@")
+#if NET9_0_OR_GREATER
+		   where TResult : allows ref struct");
+
+      if (withState)
+      {
+         _sb.Append(@"
+		   where TState : allows ref struct");
+      }
+
+      _sb.Append(@"
+#endif
       {");
 
       GenerateIndexBasedFuncSwitchBody(withState, isPartially);
@@ -723,6 +744,9 @@ private void GenerateMap(bool isPartially)
       }
 
       _sb.Append(@")
+#if NET9_0_OR_GREATER
+		   where TResult : allows ref struct
+#endif
       {");
 
       GenerateIndexBasedMapSwitchBody(isPartially);

src/Thinktecture.Runtime.Extensions.SourceGenerator/CodeAnalysis/SmartEnums/SmartEnumCodeGenerator.cs

@@ -354,7 +354,17 @@ private void GenerateSwitchForAction(bool withState, bool isPartially)
             _sb.Append(" = null");
       }
 
-      _sb.Append(@")
+      _sb.Append(")");
+
+      if (withState)
+      {
+         _sb.Append(@"
+#if NET9_0_OR_GREATER
+		where TState : allows ref struct
+#endif");
+      }
+
+      _sb.Append(@"
       {");
 
       if (_state.Settings.IsValidatable)
@@ -554,6 +564,17 @@ private void GenerateSwitchForFunc(bool withState, bool isPartially)
       }
 
       _sb.Append(@")
+#if NET9_0_OR_GREATER
+		   where TResult : allows ref struct");
+
+      if (withState)
+      {
+         _sb.Append(@"
+		   where TState : allows ref struct");
+      }
+
+      _sb.Append(@"
+#endif
       {");
 
       if (_state.Settings.IsValidatable)
@@ -724,6 +745,9 @@ private void GenerateMap(bool isPartially)
       }
 
       _sb.Append(@")
+#if NET9_0_OR_GREATER
+		   where TResult : allows ref struct
+#endif
       {");
 
       if (_state.Settings.IsValidatable)

src/Thinktecture.Runtime.Extensions.SourceGenerator/CodeAnalysis/Unions/UnionCodeGenerator.cs

@@ -250,7 +250,17 @@ private void GenerateSwitchForAction(bool withState, bool isPartially)
             _sb.Append(" = null");
       }
 
-      _sb.Append(@")
+      _sb.Append(")");
+
+      if (withState)
+      {
+         _sb.Append(@"
+#if NET9_0_OR_GREATER
+		where TState : allows ref struct
+#endif");
+      }
+
+      _sb.Append(@"
    {");
 
       GenerateIndexBasedActionSwitchBody(withState, isPartially);
@@ -387,6 +397,17 @@ private void GenerateSwitchForFunc(bool withState, bool isPartially)
       }
 
       _sb.Append(@")
+#if NET9_0_OR_GREATER
+		where TResult : allows ref struct");
+
+      if (withState)
+      {
+         _sb.Append(@"
+		where TState : allows ref struct");
+      }
+
+      _sb.Append(@"
+#endif
    {");
 
       GenerateIndexBasedFuncSwitchBody(withState, isPartially);
@@ -499,6 +520,9 @@ private void GenerateMap(bool isPartially)
       }
 
       _sb.Append(@")
+#if NET9_0_OR_GREATER
+		where TResult : allows ref struct
+#endif
    {");
 
       GenerateIndexBasedMapSwitchBody(isPartially);

src/Thinktecture.Runtime.Extensions.SourceGenerator/Thinktecture.Runtime.Extensions.SourceGenerator.csproj

@@ -1,7 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
    <PropertyGroup>
       <Description>Source generators for Thinktecture.Runtime.Extensions.</Description>
-      <TargetFrameworks></TargetFrameworks>
       <TargetFramework>netstandard2.0</TargetFramework>
       <PackageTags>sourcegenerator</PackageTags>
       <NoWarn>$(NoWarn);CS1591;RS2008;NU5128</NoWarn>

src/Thinktecture.Runtime.Extensions/Argument.cs

@@ -5,6 +5,9 @@ namespace Thinktecture;
 /// </summary>
 /// <typeparam name="T">The type of the parameter.</typeparam>
 public readonly ref struct Argument<T>
+#if NET9_0_OR_GREATER
+   where T : allows ref struct
+#endif
 {
    /// <summary>
    /// Indication whether the argument is set (explicitly).

src/Thinktecture.Runtime.Extensions/Thinktecture.Runtime.Extensions.csproj

@@ -3,6 +3,8 @@
    <PropertyGroup>
       <Description>Provides an easy way to implement Smart Enums and Value Objects.</Description>
       <PackageTags>smart-enum;value-object;</PackageTags>
+      <TargetFramework></TargetFramework> 
+      <TargetFrameworks>net7.0;net9.0;</TargetFrameworks> 
    </PropertyGroup>
 
    <ItemGroup>

test/Directory.Build.props

@@ -13,6 +13,7 @@
         <NoWarn>$(NoWarn);CS1591;CA1707;NU1903;NETSDK1206;NU1904</NoWarn>
         <RootNamespace>Thinktecture.Runtime.Tests</RootNamespace>
         <EmitCompilerGeneratedFiles>true</EmitCompilerGeneratedFiles>
+        <TargetFramework></TargetFramework>
         <TargetFrameworks>net7.0;net8.0;net9.0</TargetFrameworks>
     </PropertyGroup>
 

test/Thinktecture.Runtime.Extensions.EntityFrameworkCore8.Tests/Thinktecture.Runtime.Extensions.EntityFrameworkCore8.Tests.csproj

@@ -2,7 +2,7 @@
 
     <PropertyGroup>
         <DefineConstants>$(DefineConstants);COMPLEX_TYPES</DefineConstants>
-        <TargetFrameworks>net8.0</TargetFrameworks>
+        <TargetFrameworks>net8.0;net9.0</TargetFrameworks>
     </PropertyGroup>
 
     <ItemGroup>

test/Thinktecture.Runtime.Extensions.EntityFrameworkCore9.Tests/Thinktecture.Runtime.Extensions.EntityFrameworkCore9.Tests.csproj

@@ -2,7 +2,7 @@
 
     <PropertyGroup>
         <DefineConstants>$(DefineConstants);COMPLEX_TYPES</DefineConstants>
-        <TargetFrameworks>net8.0</TargetFrameworks>
+        <TargetFrameworks>net8.0;net9.0</TargetFrameworks>
     </PropertyGroup>
 
     <ItemGroup>