Removed all forward language and runtime versioning (#358)

* There are just too many problems with forward referencing of version to make it not worth even trying.
* Updated numerous cases where "field" or other newer runtime/language version syntax was used.
* Added extensions to support params array instead of `IEnumerable` and redirect to an IEnumerable variant.
    * This has the least impact as the consumers don't need to change except perhaps to include a `using` to reference the namespace containing the extensions.
* Comdat is no longer a ref struct

New Rules:
1) DO NOT set LangVersion to anything other than what is supported by the SDK in use. In other words don't set it to `preview` or ANY other value not supported by the targetted .NET runtime.
2) DO NOT set LangVersion at all unless mutli-targetting or explicity targetting downlevel (netstandard2.0) for plugin compatibility.

Author: smaillet

src/Interop/InteropTests/Ubiquity.NET.Llvm.Interop.UT.csproj

@@ -1,8 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
     <PropertyGroup>
         <TargetFramework>net8.0</TargetFramework>
-        <!--Until C#14 and the "field" and "extension" keywords are available use the preview language -->
-        <LangVersion>preview</LangVersion>
         <Nullable>enable</Nullable>
         <IsPackable>false</IsPackable>
         <AllowUnsafeBlocks>True</AllowUnsafeBlocks>

src/Interop/LlvmBindingsGenerator/Configuration/HandleDetails.cs

@@ -24,6 +24,7 @@ public HandleDetails(string name, string? disposer = null, bool alias = false)
         /// <summary>Gets the name of the disposer for the handle (if any)</summary>
         public string? Disposer { get; init; }
 
+#if NET9_0_OR_GREATER
         /// <summary>Gets a value indicating whether this handle has an alias type</summary>
         /// <remarks>
         /// If <see cref="Disposer"/> is <see langword="null"/> or all whitespace then the return is always <see langword="false"/> [Ignoring
@@ -34,5 +35,19 @@ public bool Alias
             get => !string.IsNullOrWhiteSpace(Disposer) && (field);
             init;
         }
+#else
+        /// <summary>Gets a value indicating whether this handle has an alias type</summary>
+        /// <remarks>
+        /// If <see cref="Disposer"/> is <see langword="null"/> or all whitespace then the return is always <see langword="false"/> [Ignoring
+        /// any value it is initialized with]
+        /// </remarks>
+        public bool Alias
+        {
+            get => !string.IsNullOrWhiteSpace( Disposer ) && (AliasBackingField);
+            init => AliasBackingField = value;
+        }
+
+        private readonly bool AliasBackingField;
+#endif
     }
 }

src/Interop/LlvmBindingsGenerator/LlvmBindingsGenerator.csproj

@@ -5,8 +5,6 @@
         <!-- Dependent library (CppSharp) ONLY supports x64 targets -->
         <PlatformTarget>x64</PlatformTarget>
         <TargetFramework>net8.0</TargetFramework>
-        <!--Until C#14 and the "field" and "extension" keywords are available use the preview language -->
-        <LangVersion>preview</LangVersion>
         <Nullable>enable</Nullable>
         <AllowUnsafeBlocks>false</AllowUnsafeBlocks>
         <SignAssembly>False</SignAssembly>

src/Interop/Ubiquity.NET.Llvm.Interop/Ubiquity.NET.Llvm.Interop.csproj

@@ -1,8 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
     <PropertyGroup>
         <TargetFramework>net8.0</TargetFramework>
-        <!--Until C#14 and the "field" and "extension" keywords are available use the preview language -->
-        <LangVersion>preview</LangVersion>
         <Nullable>enable</Nullable>
 
         <!-- TODO: additional RIDs as supported in native library -->

src/Samples/CodeGenWithDebugInfo/CodeGenWithDebugInfo.csproj

@@ -2,7 +2,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
     <PropertyGroup>
         <TargetFramework>net8.0</TargetFramework>
-        <LangVersion>13</LangVersion>
         <OutputType>exe</OutputType>
         <OutputTypeEx>exe</OutputTypeEx>
         <GeneratePackageOnBuild>false</GeneratePackageOnBuild>

src/Samples/Kaleidoscope/Chapter2/Chapter2.csproj

@@ -2,7 +2,6 @@
     <PropertyGroup>
         <OutputType>Exe</OutputType>
         <TargetFramework>net8.0</TargetFramework>
-        <LangVersion>13</LangVersion>
         <AssemblyName>kls2</AssemblyName>
         <RootNamespace>Kaleidoscope</RootNamespace>
         <PlatformTarget>AnyCPU</PlatformTarget>

src/Samples/Kaleidoscope/Chapter3.5/Chapter3.5.csproj

@@ -2,7 +2,6 @@
     <PropertyGroup>
         <OutputType>Exe</OutputType>
         <TargetFramework>net8.0</TargetFramework>
-        <LangVersion>13</LangVersion>
         <AssemblyName>kls3.5</AssemblyName>
         <RootNamespace>Kaleidoscope</RootNamespace>
         <PlatformTarget>AnyCPU</PlatformTarget>

src/Samples/Kaleidoscope/Chapter3/Chapter3.csproj

@@ -2,7 +2,6 @@
     <PropertyGroup>
         <OutputType>Exe</OutputType>
         <TargetFramework>net8.0</TargetFramework>
-        <LangVersion>13</LangVersion>
         <AssemblyName>kls3</AssemblyName>
         <RootNamespace>Kaleidoscope</RootNamespace>
         <PlatformTarget>AnyCPU</PlatformTarget>

src/Samples/Kaleidoscope/Chapter4/Chapter4.csproj

@@ -2,7 +2,6 @@
     <PropertyGroup>
         <OutputType>Exe</OutputType>
         <TargetFramework>net8.0</TargetFramework>
-        <LangVersion>13</LangVersion>
         <AssemblyName>kls4</AssemblyName>
         <RootNamespace>Kaleidoscope</RootNamespace>
         <PlatformTarget>AnyCPU</PlatformTarget>

src/Samples/Kaleidoscope/Chapter5/Chapter5.csproj

@@ -2,7 +2,6 @@
     <PropertyGroup>
         <OutputType>Exe</OutputType>
         <TargetFramework>net8.0</TargetFramework>
-        <LangVersion>13</LangVersion>
         <AssemblyName>kls5</AssemblyName>
         <RootNamespace>Kaleidoscope</RootNamespace>
         <PlatformTarget>AnyCPU</PlatformTarget>