Add all source code

.gitignore

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+## Ignore Visual Studio temporary files, build results, and
+## files generated by popular Visual Studio add-ons.
+
+# User-specific files
+*.suo
+*.user
+*.userosscache
+*.sln.docstates
+
+# User-specific files (MonoDevelop/Xamarin Studio)
+*.userprefs
+
+# Build results
+[Dd]ebug/
+[Dd]ebugPublic/
+[Rr]elease/
+[Rr]eleases/
+x64/
+x86/
+bld/
+[Bb]in/
+[Oo]bj/
+[Ll]og/
+
+# Visual Studio 2015 cache/options directory
+.vs/
+# Uncomment if you have tasks that create the project's static files in wwwroot
+#wwwroot/
+
+# MSTest test Results
+[Tt]est[Rr]esult*/
+[Bb]uild[Ll]og.*
+
+# NUNIT
+*.VisualState.xml
+TestResult.xml
+
+# Build Results of an ATL Project
+[Dd]ebugPS/
+[Rr]eleasePS/
+dlldata.c
+
+# DNX
+project.lock.json
+artifacts/
+
+*_i.c
+*_p.c
+*_i.h
+*.ilk
+*.meta
+*.obj
+*.pch
+*.pdb
+*.pgc
+*.pgd
+*.rsp
+*.sbr
+*.tlb
+*.tli
+*.tlh
+*.tmp
+*.tmp_proj
+*.log
+*.vspscc
+*.vssscc
+.builds
+*.pidb
+*.svclog
+*.scc
+
+# Chutzpah Test files
+_Chutzpah*
+
+# Visual C++ cache files
+ipch/
+*.aps
+*.ncb
+*.opendb
+*.opensdf
+*.sdf
+*.cachefile
+*.VC.db
+*.VC.VC.opendb
+
+# Visual Studio profiler
+*.psess
+*.vsp
+*.vspx
+*.sap
+
+# TFS 2012 Local Workspace
+$tf/
+
+# Guidance Automation Toolkit
+*.gpState
+
+# ReSharper is a .NET coding add-in
+_ReSharper*/
+*.[Rr]e[Ss]harper
+*.DotSettings.user
+
+# JustCode is a .NET coding add-in
+.JustCode
+
+# TeamCity is a build add-in
+_TeamCity*
+
+# DotCover is a Code Coverage Tool
+*.dotCover
+
+# NCrunch
+_NCrunch_*
+.*crunch*.local.xml
+nCrunchTemp_*
+
+# MightyMoose
+*.mm.*
+AutoTest.Net/
+
+# Web workbench (sass)
+.sass-cache/
+
+# Installshield output folder
+[Ee]xpress/
+
+# DocProject is a documentation generator add-in
+DocProject/buildhelp/
+DocProject/Help/*.HxT
+DocProject/Help/*.HxC
+DocProject/Help/*.hhc
+DocProject/Help/*.hhk
+DocProject/Help/*.hhp
+DocProject/Help/Html2
+DocProject/Help/html
+
+# Click-Once directory
+publish/
+
+# Publish Web Output
+*.[Pp]ublish.xml
+*.azurePubxml
+# TODO: Comment the next line if you want to checkin your web deploy settings
+# but database connection strings (with potential passwords) will be unencrypted
+*.pubxml
+*.publishproj
+
+# Microsoft Azure Web App publish settings. Comment the next line if you want to
+# checkin your Azure Web App publish settings, but sensitive information contained
+# in these scripts will be unencrypted
+PublishScripts/
+
+# NuGet Packages
+*.nupkg
+# The packages folder can be ignored because of Package Restore
+**/packages/*
+# except build/, which is used as an MSBuild target.
+!**/packages/build/
+# Uncomment if necessary however generally it will be regenerated when needed
+#!**/packages/repositories.config
+# NuGet v3's project.json files produces more ignoreable files
+*.nuget.props
+*.nuget.targets
+*.nuget.g.props
+*.nuget.g.targets
+
+*.packagespec.json
+*.assets.json
+
+# Microsoft Azure Build Output
+csx/
+*.build.csdef
+
+# Microsoft Azure Emulator
+ecf/
+rcf/
+
+# Windows Store app package directories and files
+AppPackages/
+BundleArtifacts/
+Package.StoreAssociation.xml
+_pkginfo.txt
+
+# Visual Studio cache files
+# files ending in .cache can be ignored
+*.[Cc]ache
+# but keep track of directories ending in .cache
+!*.[Cc]ache/
+
+# Others
+ClientBin/
+~$*
+*~
+*.dbmdl
+*.dbproj.schemaview
+*.pfx
+*.publishsettings
+node_modules/
+orleans.codegen.cs
+
+# Since there are multiple workflows, uncomment next line to ignore bower_components
+# (https://github.com/github/gitignore/pull/1529#issuecomment-104372622)
+#bower_components/
+
+# RIA/Silverlight projects
+Generated_Code/
+
+# Backup & report files from converting an old project file
+# to a newer Visual Studio version. Backup files are not needed,
+# because we have git ;-)
+_UpgradeReport_Files/
+Backup*/
+UpgradeLog*.XML
+UpgradeLog*.htm
+
+# SQL Server files
+*.mdf
+*.ldf
+
+# Business Intelligence projects
+*.rdl.data
+*.bim.layout
+*.bim_*.settings
+
+# Microsoft Fakes
+FakesAssemblies/
+
+# GhostDoc plugin setting file
+*.GhostDoc.xml
+
+# Node.js Tools for Visual Studio
+.ntvs_analysis.dat
+
+# Visual Studio 6 build log
+*.plg
+
+# Visual Studio 6 workspace options file
+*.opt
+
+# Visual Studio LightSwitch build output
+**/*.HTMLClient/GeneratedArtifacts
+**/*.DesktopClient/GeneratedArtifacts
+**/*.DesktopClient/ModelManifest.xml
+**/*.Server/GeneratedArtifacts
+**/*.Server/ModelManifest.xml
+_Pvt_Extensions
+
+# Paket dependency manager
+.paket/paket.exe
+paket-files/
+
+# FAKE - F# Make
+.fake/
+
+# JetBrains Rider
+.idea/
+*.sln.iml
+.DS_Store
+
+# Test artifacts
+Target/
+Build/
+
+# Testkit CAs
+testkit/CAs/*
+testkit/CustomCAs/customRoot.crt
+
+testkit/CustomCAs/customRoot2.crt

HydrationPrototype.Analyzers/AnalyzerReleases.Unshipped.md

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+### New Rules
+
+Rule ID | Category | Severity | Notes
+--------|----------|----------|-------
+N4JHY001 | Hydration | Error | Classes for hydration must be marked partial

HydrationPrototype.Analyzers/HydrationPrototype.Analyzers.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+    <PropertyGroup>
+        <TargetFramework>netstandard2.0</TargetFramework>
+        <ImplicitUsings>enable</ImplicitUsings>
+        <Nullable>enable</Nullable>
+        <LangVersion>preview</LangVersion>
+    </PropertyGroup>
+
+    <ItemGroup>
+      <PackageReference Include="Microsoft.CodeAnalysis.Common" Version="4.4.0" />
+      <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="4.4.0" />
+      <PackageReference Include="Microsoft.CodeAnalysis.Workspaces.Common" Version="4.4.0" />
+    </ItemGroup>
+
+    <ItemGroup>
+      <ProjectReference Include="..\HydrationPrototype.Generators\HydrationPrototype.Generators.csproj" />
+      <ProjectReference Include="..\HydrationPrototype\HydrationPrototype.csproj" />
+    </ItemGroup>
+
+</Project>

HydrationPrototype.Analyzers/HydratorAnalyzer.cs

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+using System.Collections.Immutable;
+using HydrationPrototype.Attributes;
+using Microsoft.CodeAnalysis;
+using Microsoft.CodeAnalysis.CSharp;
+using Microsoft.CodeAnalysis.CSharp.Syntax;
+using Microsoft.CodeAnalysis.Diagnostics;
+
+namespace HydrationPrototype.Analyzers;
+
+[DiagnosticAnalyzer(LanguageNames.CSharp)]
+public class HydratorAnalyzer : DiagnosticAnalyzer
+{
+    public const string DiagnosticId = "N4JHY001";
+
+    private const string Title = "Mark class as partial";
+    private const string MessageFormat = "Class marked with a hydration attribute must be marked partial";
+
+    private const string Description = "Classes marked with a hydration attribute must be partial classes, because " +
+                                       "the generator generates another part to the class that implements the hydration.";
+
+    private const string Category = "Hydration";
+
+    private static readonly DiagnosticDescriptor Rule = new DiagnosticDescriptor(DiagnosticId, Title, MessageFormat,
+        Category, DiagnosticSeverity.Error, isEnabledByDefault: true, description: Description);
+
+    private static readonly ImmutableArray<DiagnosticDescriptor> RuleArray = ImmutableArray.Create(Rule);
+
+    public override void Initialize(AnalysisContext context)
+    {
+        context.EnableConcurrentExecution();
+        context.ConfigureGeneratedCodeAnalysis(GeneratedCodeAnalysisFlags.Analyze |
+                                               GeneratedCodeAnalysisFlags.ReportDiagnostics);
+        context.RegisterSyntaxNodeAction(AnalyzeNode, SyntaxKind.ClassDeclaration);
+    }
+
+    private void AnalyzeNode(SyntaxNodeAnalysisContext context)
+    {
+        var cls = (ClassDeclarationSyntax)context.Node;
+        var symbol = (ITypeSymbol)context.SemanticModel.GetDeclaredSymbol(cls)!;
+
+        var generateMapperAttribute =
+            symbol.GetAttributeInstances<GenerateHydrationFromNodeAttribute>().Any()
+            || symbol.GetAttributeInstances<GenerateHydrationFromRecordAttribute>().Any();
+
+        if (!generateMapperAttribute || cls.Modifiers.Any(mod => mod.IsKind(SyntaxKind.PartialKeyword)))
+        {
+            return;
+        }
+
+        var list = string.Join(",", cls.Modifiers.Select(m => m.Text));
+
+        var diagnostic = Diagnostic.Create(Rule, cls.Identifier.GetLocation());
+        context.ReportDiagnostic(diagnostic);
+    }
+
+    public override ImmutableArray<DiagnosticDescriptor> SupportedDiagnostics => RuleArray;
+}