[WIP] Support for basic foreach loops

libs/UIX.DecompXml/CodeBlockInfo.cs

@@ -1,5 +1,4 @@
-using Microsoft.CodeAnalysis.CSharp;
-using Microsoft.CodeAnalysis.CSharp.Syntax;
+using Microsoft.CodeAnalysis.CSharp.Syntax;
 using System.Collections.Generic;
 
 using static Microsoft.CodeAnalysis.CSharp.SyntaxFactory;
@@ -8,21 +7,18 @@ namespace Microsoft.Iris.DecompXml;
 
 internal record CodeBlockInfo
 {
-    public CodeBlockInfo(uint startOffset, uint endOffset, SyntaxKind kind, ExpressionSyntax expression = null)
+    public CodeBlockInfo(uint startOffset, uint endOffset, ICodeBlockAdditionalInfo additionalInfo = null)
     {
         StartOffset = startOffset;
         EndOffset = endOffset;
-        Kind = kind;
-        Expression = expression;
+        AdditionalInfo = additionalInfo;
     }
 
     public uint StartOffset { get; init; }
 
     public uint EndOffset { get; init; }
 
-    public SyntaxKind Kind { get; init; }
-
-    public ExpressionSyntax Expression { get; init; }
+    public ICodeBlockAdditionalInfo AdditionalInfo { get; init; }
 
     public List<StatementSyntax> Statements { get; } = [];
 
@@ -30,21 +26,45 @@ internal record CodeBlockInfo
     {
         var blockBody = Block(Statements);
 
-        switch (Kind)
+        switch (AdditionalInfo)
         {
-            case SyntaxKind.IfStatement:
-                var ifStatement = IfStatement(Expression, blockBody);
+            case IfBlockInfo ifBlockInfo:
+                var ifStatement = IfStatement(ifBlockInfo.Condition, blockBody);
                 parentBlock.Statements.Add(ifStatement);
                 break;
 
-            case SyntaxKind.ElseClause:
+            case ElseBlockInfo _:
                 var elseClause = ElseClause(blockBody);
                 var ifElseBlock = (IfStatementSyntax)parentBlock.Statements[^1];
                 parentBlock.Statements[^1] = ifElseBlock.WithElse(elseClause);
                 break;
 
+            case ForEachBlockInfo forEachBlockInfo:
+                var foreachStatement = ForEachStatement(forEachBlockInfo.Type, forEachBlockInfo.Identifier,
+                    forEachBlockInfo.Source, blockBody);
+                parentBlock.Statements.Add(foreachStatement);
+                break;
+
             default:
-                throw new System.NotImplementedException($"Unrecognized code block kind '{Kind}'");
+                throw new System.NotImplementedException($"Unrecognized code block kind '{AdditionalInfo.GetType().Name}'");
         }
     }
 }
+
+internal interface ICodeBlockAdditionalInfo;
+
+internal class IfBlockInfo(ExpressionSyntax condition = null) : ICodeBlockAdditionalInfo
+{
+    public ExpressionSyntax Condition { get; set; } = condition;
+}
+
+internal class ElseBlockInfo : ICodeBlockAdditionalInfo;
+
+internal class ForEachBlockInfo : ICodeBlockAdditionalInfo
+{
+    public ExpressionSyntax Source { get; set; }
+
+    public string Identifier { get; set; }
+
+    public TypeSyntax Type { get; set; }
+}