Support writing records with skipped fields in generated code

Directory.Packages.props

@@ -1,8 +1,7 @@
 <Project>
   <ItemGroup>
     <PackageVersion Include="BenchmarkDotNet" Version="0.14.0" />
-    <PackageVersion Include="Microsoft.CodeAnalysis.Analyzers" Version="3.11.0" />
-    <PackageVersion Include="Microsoft.CodeAnalysis.CSharp" Version="4.11.0" />
+    <PackageVersion Include="Microsoft.CodeAnalysis.CSharp" Version="4.12.0-3.final" />
     <PackageVersion Include="MSTest" Version="3.6.3" />
   </ItemGroup>
 </Project>

src/Addax.Formats.Tabular.Analyzers.CSharp.UnitTests/Addax.Formats.Tabular.Analyzers.CSharp.UnitTests.csproj

@@ -6,7 +6,6 @@
     <IsPackable>false</IsPackable>
   </PropertyGroup>
   <ItemGroup>
-    <PackageReference Include="Microsoft.CodeAnalysis.Analyzers" />
     <PackageReference Include="Microsoft.CodeAnalysis.CSharp" />
     <PackageReference Include="MSTest" />
   </ItemGroup>

src/Addax.Formats.Tabular.Analyzers.CSharp/Addax.Formats.Tabular.Analyzers.CSharp.csproj

@@ -7,9 +7,6 @@
     <AnalyzerLanguage>cs</AnalyzerLanguage>
   </PropertyGroup>
   <ItemGroup>
-    <PackageReference Include="Microsoft.CodeAnalysis.Analyzers">
-      <PrivateAssets>all</PrivateAssets>
-    </PackageReference>
     <PackageReference Include="Microsoft.CodeAnalysis.CSharp">
       <PrivateAssets>all</PrivateAssets>
     </PackageReference>

src/Addax.Formats.Tabular.Analyzers.CSharp/SourceTextWriter.cs

@@ -0,0 +1,72 @@
+// (c) Oleksandr Kozlenko. Licensed under the MIT license.
+
+using System;
+using System.Diagnostics;
+using System.IO;
+using System.Text;
+using Microsoft.CodeAnalysis.Text;
+
+namespace Addax.Formats.Tabular.Analyzers.CSharp
+{
+    internal sealed class SourceTextWriter : IDisposable
+    {
+        private readonly MemoryStream _memoryStream = new MemoryStream();
+        private readonly StreamWriter _streamWriter;
+        private readonly char _indentChar;
+        private readonly int _indentSize;
+
+        public SourceTextWriter(Encoding encoding, char indentChar, int indentSize)
+        {
+            Debug.Assert(encoding != null);
+            Debug.Assert(indentSize >= 0);
+
+            _streamWriter = new StreamWriter(_memoryStream, encoding);
+            _indentChar = indentChar;
+            _indentSize = indentSize;
+        }
+
+        public void Dispose()
+        {
+            _streamWriter.Dispose();
+        }
+
+        public void WriteLine(string value)
+        {
+            Debug.Assert(value != null);
+
+            var indentation = Indent * _indentSize;
+
+            for (var i = 0; i < indentation; i++)
+            {
+                _streamWriter.Write(_indentChar);
+            }
+
+            _streamWriter.WriteLine(value);
+        }
+
+        public void WriteLine()
+        {
+            _streamWriter.WriteLine();
+        }
+
+        public SourceText ToSourceText()
+        {
+            _streamWriter.Flush();
+
+            return SourceText.From(_memoryStream, _streamWriter.Encoding, canBeEmbedded: true);
+        }
+
+        public void Reset()
+        {
+            Indent = 0;
+
+            _memoryStream.SetLength(0);
+        }
+
+        public int Indent
+        {
+            get;
+            set;
+        }
+    }
+}

src/Addax.Formats.Tabular.Analyzers.CSharp/TabularFieldMapping.cs

@@ -11,13 +11,15 @@ internal readonly struct TabularFieldMapping
         public readonly string MemberName;
         public readonly string ValueTypeName;
         public readonly string ConverterTypeName;
-        public readonly TypeMemberAccess MemberAccess;
-        public readonly bool AsNullableT;
+        public readonly bool SupportsWriting;
+        public readonly bool SupportsReading;
+        public readonly bool IsNullableT;
 
         public TabularFieldMapping(
             string memberName,
-            TypeMemberAccess memberAccess,
-            bool asNullableT,
+            bool supportsReading,
+            bool supportsWriting,
+            bool isNullableT,
             string valueTypeName,
             string converterTypeName,
             SyntaxToken? fieldNameLiteral)
@@ -26,8 +28,9 @@ public TabularFieldMapping(
             Debug.Assert(valueTypeName != null);
 
             MemberName = memberName;
-            MemberAccess = memberAccess;
-            AsNullableT = asNullableT;
+            SupportsReading = supportsReading;
+            SupportsWriting = supportsWriting;
+            IsNullableT = isNullableT;
             ValueTypeName = valueTypeName;
             ConverterTypeName = converterTypeName;
             FieldNameLiteral = fieldNameLiteral;