[cfe] Add WildcardBinder and ListBinder internal AST nodes

Part of #49749

Change-Id: Ic47effd09ebb38568a9c7847e658d22f03b2d873
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/258806
Commit-Queue: Chloe Stefantsova <[email protected]>
Reviewed-by: Johnni Winther <[email protected]>

Author: chloestefantsova

pkg/front_end/lib/src/fasta/kernel/internal_ast.dart

@@ -4966,7 +4966,8 @@ class InternalRecordLiteral extends InternalExpression {
 
   @override
   void transformChildren(Transformer v) {
-    unsupported("${transformChildren}.accept on ${v.runtimeType}", -1, null);
+    unsupported(
+        "${runtimeType}.transformChildren on ${v.runtimeType}", -1, null);
   }
 
   @override
@@ -5006,3 +5007,115 @@ class InternalRecordLiteral extends InternalExpression {
     printer.write(')');
   }
 }
+
+abstract class Binder extends TreeNode {}
+
+class ListBinder extends Binder {
+  final DartType typeBinderArgument;
+  final List<Binder> binders;
+
+  ListBinder(this.typeBinderArgument, this.binders);
+
+  @override
+  R accept<R>(TreeVisitor<R> visitor) {
+    if (visitor is Printer || visitor is Precedence || visitor is Transformer) {
+      // Allow visitors needed for toString and replaceWith.
+      return visitor.defaultTreeNode(this);
+    }
+    return unsupported(
+        "${runtimeType}.accept on ${visitor.runtimeType}", -1, null);
+  }
+
+  @override
+  R accept1<R, A>(TreeVisitor1<R, A> visitor, A arg) {
+    return unsupported(
+        "${runtimeType}.accept1 on ${visitor.runtimeType}", -1, null);
+  }
+
+  @override
+  void toTextInternal(AstPrinter printer) {
+    printer.write('[');
+    String comma = '';
+    for (Binder binder in binders) {
+      printer.write(comma);
+      binder.toTextInternal(printer);
+      comma = ', ';
+    }
+    printer.write(']');
+  }
+
+  @override
+  void transformChildren(Transformer v) {
+    unsupported(
+        "${runtimeType}.transformChildren on ${v.runtimeType}", -1, null);
+  }
+
+  @override
+  void transformOrRemoveChildren(RemovingTransformer v) {
+    unsupported("${runtimeType}.transformOrRemoveChildren on ${v.runtimeType}",
+        -1, null);
+  }
+
+  @override
+  void visitChildren(Visitor v) {
+    unsupported("${runtimeType}.visitChildren on ${v.runtimeType}", -1, null);
+  }
+
+  @override
+  String toString() {
+    return "ListBinder(${toStringInternal()})";
+  }
+}
+
+class WildcardBinder extends Binder {
+  final DartType? type;
+
+  WildcardBinder(this.type);
+
+  @override
+  R accept<R>(TreeVisitor<R> visitor) {
+    if (visitor is Printer || visitor is Precedence || visitor is Transformer) {
+      // Allow visitors needed for toString and replaceWith.
+      return visitor.defaultTreeNode(this);
+    }
+    return unsupported(
+        "${runtimeType}.accept on ${visitor.runtimeType}", -1, null);
+  }
+
+  @override
+  R accept1<R, A>(TreeVisitor1<R, A> visitor, A arg) {
+    return unsupported(
+        "${runtimeType}.accept1 on ${visitor.runtimeType}", -1, null);
+  }
+
+  @override
+  void toTextInternal(AstPrinter printer) {
+    if (type != null) {
+      type!.toTextInternal(printer);
+      printer.write(" ");
+    }
+    printer.write("_");
+  }
+
+  @override
+  void transformChildren(Transformer v) {
+    unsupported(
+        "${runtimeType}.transformChildren on ${v.runtimeType}", -1, null);
+  }
+
+  @override
+  void transformOrRemoveChildren(RemovingTransformer v) {
+    unsupported("${runtimeType}.transformOrRemoveChildren on ${v.runtimeType}",
+        -1, null);
+  }
+
+  @override
+  void visitChildren(Visitor v) {
+    unsupported("${runtimeType}.visitChildren on ${v.runtimeType}", -1, null);
+  }
+
+  @override
+  String toString() {
+    return "WildcardBinder(${toStringInternal()})";
+  }
+}