Refresh generated-code comments after the null-object removal

ICSharpCode.Decompiler.Generators/DecompilerSyntaxTreeGenerator.cs

@@ -58,8 +58,8 @@ internal class DecompilerSyntaxTreeGenerator : IIncrementalGenerator
 
 		List<(string Member, string TypeName, bool RecursiveMatch, bool MatchAny, bool Nullable)>? membersToMatch = null;
 
-		// Abstract base nodes are never the dispatch target of DoMatch (concrete subclasses and the
-		// null-object each emit their own and do not chain to base), so emitting one here is dead code.
+		// Abstract base nodes are never the dispatch target of DoMatch (concrete subclasses each emit
+		// their own and do not chain to base), so emitting one here is dead code.
 		if (!targetSymbol.IsAbstract && !targetSymbol.MemberNames.Contains("DoMatch"))
 		{
 			membersToMatch = new();
@@ -324,9 +324,9 @@ internal class DecompilerSyntaxTreeGenerator : IIncrementalGenerator
 		{
 			var slots = slotsArray.ToList();
 
-			// Backing fields and the partial-property bodies. A single slot stores a nullable field and
-			// substitutes the role's null object when empty (pre-NRT); a collection slot owns a lazily
-			// created AstNodeCollection bound to this node. A slot re-declared from an inherited contract
+			// Backing fields and the partial-property bodies. A single slot stores a nullable backing
+			// field (returned null-forgiving for a required child, nullable for an optional one); a
+			// collection slot owns a lazily created AstNodeCollection bound to this node. A slot re-declared from an inherited contract
 			// member (Part I.3 flatten) is an override.
 			foreach (var (roleExpr, isCollection, name, type, elementType, isOverride, isNullable, kindName, isPartial) in slots)
 			{

ICSharpCode.Decompiler/CSharp/Syntax/AstNode.cs

@@ -343,7 +343,7 @@ namespace ICSharpCode.Decompiler.CSharp.Syntax
 		// A single slot occupies exactly one index (even when empty, where GetChild returns null); a
 		// collection slot occupies a contiguous run of its current length. The generator emits these
 		// four members per node from its [Slot] partial-property declarations; nodes without children
-		// (and the null/placeholder nodes) keep the zero-child defaults below.
+		// (and the placeholder nodes) keep the zero-child defaults below.
 
 		internal virtual int GetChildCount() => 0;
 
@@ -487,9 +487,9 @@ namespace ICSharpCode.Decompiler.CSharp.Syntax
 				SetChildByRoleUntyped(kind, child);
 		}
 
-		// Sets the single slot matching the role (used by the non-generic mutation API). Symmetric with
-		// GetChildByRole, which returns null for a role this node does not declare a slot for:
-		// a node has no child of a role it has no slot for, so writing one is a no-op.
+		// Sets the single slot matching the kind (used by the non-generic mutation API). Unlike
+		// GetChildByRole, which returns null when this node declares no slot of that kind, writing a
+		// child to a kind the node has no slot for throws.
 		internal void SetChildByRoleUntyped(SlotKind kind, AstNode? child)
 		{
 			int count = GetChildCount();

ICSharpCode.Decompiler/CSharp/Syntax/AstNodeCollection.cs

@@ -240,7 +240,7 @@ namespace ICSharpCode.Decompiler.CSharp.Syntax
 
 		/// <summary>
 		/// Returns the first element for which the predicate returns true,
-		/// or the null node (AstNode with IsNull=true) if no such object is found.
+		/// or null if no such object is found.
 		/// </summary>
 		public T FirstOrNullObject(Func<T, bool>? predicate = null)
 		{
@@ -252,7 +252,7 @@ namespace ICSharpCode.Decompiler.CSharp.Syntax
 
 		/// <summary>
 		/// Returns the last element for which the predicate returns true,
-		/// or the null node (AstNode with IsNull=true) if no such object is found.
+		/// or null if no such object is found.
 		/// </summary>
 		public T LastOrNullObject(Func<T, bool>? predicate = null)
 		{

ICSharpCode.Decompiler/CSharp/Syntax/TypeMembers/EventDeclaration.cs

@@ -89,7 +89,7 @@ namespace ICSharpCode.Decompiler.CSharp.Syntax
 
 		/// <summary>
 		/// Gets/Sets the type reference of the interface that is explicitly implemented.
-		/// Null node if this member is not an explicit interface implementation.
+		/// Null if this member is not an explicit interface implementation.
 		/// </summary>
 		[Slot("PrivateImplementationType")]
 		public partial AstType? PrivateImplementationType { get; set; }

ICSharpCode.Decompiler/CSharp/Syntax/TypeMembers/IndexerDeclaration.cs

@@ -50,16 +50,16 @@ namespace ICSharpCode.Decompiler.CSharp.Syntax
 			get { return SymbolKind.Indexer; }
 		}
 
-		/// <summary>
-		/// Gets/Sets the type reference of the interface that is explicitly implemented.
-		/// Null node if this member is not an explicit interface implementation.
-		/// </summary>
 		[Slot("Attribute")]
 		public override partial AstNodeCollection<AttributeSection> Attributes { get; }
 
 		[Slot("Type")]
 		public override partial AstType ReturnType { get; set; }
 
+		/// <summary>
+		/// Gets/Sets the type reference of the interface that is explicitly implemented.
+		/// Null if this member is not an explicit interface implementation.
+		/// </summary>
 		[Slot("PrivateImplementationType")]
 		public partial AstType? PrivateImplementationType { get; set; }
 

ICSharpCode.Decompiler/CSharp/Syntax/TypeMembers/MethodDeclaration.cs

@@ -50,7 +50,7 @@ namespace ICSharpCode.Decompiler.CSharp.Syntax
 
 		/// <summary>
 		/// Gets/Sets the type reference of the interface that is explicitly implemented.
-		/// Null node if this member is not an explicit interface implementation.
+		/// Null if this member is not an explicit interface implementation.
 		/// </summary>
 		[Slot("PrivateImplementationType")]
 		public partial AstType? PrivateImplementationType { get; set; }

ICSharpCode.Decompiler/CSharp/Syntax/TypeMembers/OperatorDeclaration.cs

@@ -142,16 +142,16 @@ namespace ICSharpCode.Decompiler.CSharp.Syntax
 			get { return SymbolKind.Operator; }
 		}
 
-		/// <summary>
-		/// Gets/Sets the type reference of the interface that is explicitly implemented.
-		/// Null node if this member is not an explicit interface implementation.
-		/// </summary>
 		[Slot("Attribute")]
 		public override partial AstNodeCollection<AttributeSection> Attributes { get; }
 
 		[Slot("Type")]
 		public override partial AstType ReturnType { get; set; }
 
+		/// <summary>
+		/// Gets/Sets the type reference of the interface that is explicitly implemented.
+		/// Null if this member is not an explicit interface implementation.
+		/// </summary>
 		[Slot("PrivateImplementationType")]
 		public partial AstType? PrivateImplementationType { get; set; }
 

ICSharpCode.Decompiler/CSharp/Syntax/TypeMembers/PropertyDeclaration.cs

@@ -46,10 +46,6 @@ namespace ICSharpCode.Decompiler.CSharp.Syntax
 			get { return SymbolKind.Property; }
 		}
 
-		/// <summary>
-		/// Gets/Sets the type reference of the interface that is explicitly implemented.
-		/// Null node if this member is not an explicit interface implementation.
-		/// </summary>
 		[Slot("Attribute")]
 		public override partial AstNodeCollection<AttributeSection> Attributes { get; }
 
@@ -59,6 +55,10 @@ namespace ICSharpCode.Decompiler.CSharp.Syntax
 		[Slot("Identifier")]
 		public override partial Identifier NameToken { get; set; }
 
+		/// <summary>
+		/// Gets/Sets the type reference of the interface that is explicitly implemented.
+		/// Null if this member is not an explicit interface implementation.
+		/// </summary>
 		[Slot("PrivateImplementationType")]
 		public partial AstType? PrivateImplementationType { get; set; }