The generator emits a Slots holder of typed CSharpSlotInfo<T> kind constants (T is
the child type, widened to AstNode for the few kinds reused with several child
types). Call sites whose kind maps to a single type switch from
GetChildByRole<T>(SlotKind.X) to GetChild(Slots.X), inferring the result type from
the slot. The ByRole methods and SlotKind remain for the multi-type Attribute
accessor and the internal add/insert plumbing, removed in following steps.
Assisted-by: Claude:claude-opus-4-8:Claude Code
Completes the nullable migration for ICSharpCode.Decompiler/CSharp/Syntax: every
hand-written file now carries #nullable enable. The pattern-matching API
(INode/Pattern/PatternExtensions DoMatch/Match/IsMatch) takes a nullable 'other',
since matching legitimately compares a pattern against a missing child. Members
that genuinely return or accept null are annotated to match (AttributeSection's
target token, IAnnotatable.Annotation<T>, Statement/Expression.ReplaceWith,
SyntaxExtensions.GetNextStatement), and a latent null dereference in
Backreference.DoMatch is fixed.
Assisted-by: Claude:claude-opus-4-8:Claude Code
The pattern matcher walked collections through INode.Role/FirstChild/
NextSibling, skipping siblings of a different role. Now that each
AstNodeCollection<T> is already the per-role child list, the engine matches two
collections by list index, and INode sheds Role/FirstChild/NextSibling
entirely. A collection exposes its IReadOnlyList<INode> view through a cached
adapter rather than implementing the interface directly, so a typed collection
does not become ambiguous for LINQ. Characterization tests pin the matcher's
behavior first.
Assisted-by: Claude:claude-opus-4-8:Claude Code
The generator emits the IAstVisitor interface, the AcceptVisitor overloads,
and the null-node and pattern-placeholder nodes from [DecompilerAstNode]
declarations, so drop the hand-written equivalents across the C# AST: per-node
AcceptVisitor/DoMatch, the #region Null / #region PatternPlaceholder blocks,
IAstVisitor.cs, and now-dead usings. Also adds AccessorKind and moves
IdentifierExpressionBackreference into the PatternMatching folder.
Assisted-by: Claude:claude-opus-4-8:Claude Code