Revert "Remove CodeDom"

Author: sschmid

src/Entitas.CodeGeneration.Plugins/src/CodeGeneratorExtensions.cs

@@ -1,4 +1,5 @@
-using System.Linq;
+using System.CodeDom.Compiler;
+using System.Linq;
 using DesperateDevs.Extensions;
 using Entitas.CodeGeneration.Attributes;
 
@@ -8,13 +9,17 @@ public static class CodeGeneratorExtensions
     {
         public const string LOOKUP = "ComponentsLookup";
 
+        const string KEYWORD_PREFIX = "@";
+
         public static bool ignoreNamespaces;
 
+        static readonly CodeDomProvider provider = CodeDomProvider.CreateProvider("C#");
+
         public static string ComponentName(this ComponentData data) =>
             data.GetTypeName().ToComponentName(ignoreNamespaces);
 
         public static string ComponentNameValidLowerFirst(this ComponentData data) =>
-            ComponentName(data).ToLowerFirst();
+            ComponentName(data).ToLowerFirst().AddPrefixIfIsKeyword();
 
         public static string ComponentNameWithContext(this ComponentData data, string contextName) =>
             contextName + data.ComponentName();
@@ -97,5 +102,13 @@ public static string GetMethodParameters(this MemberData[] memberData, bool newP
 
         public static string GetMethodArgs(MemberData[] memberData, bool newPrefix) => string.Join(", ", memberData
             .Select(info => newPrefix ? $"new{info.name.ToUpperFirst()}" : info.name));
+
+        public static string AddPrefixIfIsKeyword(this string name)
+        {
+            if (!provider.IsValidIdentifier(name))
+                name = KEYWORD_PREFIX + name;
+
+            return name;
+        }
     }
 }

src/Entitas.CodeGeneration.Plugins/src/Entitas.CodeGeneration.Plugins.csproj

@@ -8,6 +8,7 @@
     <PackageReference Include="DesperateDevs.Serialization" Version="2.0.0" />
     <PackageReference Include="Jenny" Version="1.0.0" />
     <PackageReference Include="Jenny.Generator" Version="1.0.0" />
+    <PackageReference Include="System.CodeDom" Version="6.0.0" />
   </ItemGroup>
 
   <ItemGroup>

src/Entitas.CodeGeneration.Plugins/src/EntityIndex/CodeGenerators/EntityIndexGenerator.cs

@@ -134,7 +134,8 @@ string generateMethods(EntityIndexData data, string contextName) => ADD_INDEX_TE
             .Replace("${MemberName}", data.GetMemberName())
             .Replace("${componentName}", data.GetComponentType()
                 .ToComponentName(_ignoreNamespacesConfig.ignoreNamespaces)
-                .ToLowerFirst());
+                .ToLowerFirst()
+                .AddPrefixIfIsKeyword());
 
         string generateGetMethods(EntityIndexData data) => string.Join("\n\n", data.GetContextNames()
             .Aggregate(new List<string>(), (getMethods, contextName) =>