This is sort of working. Kinda.

Starship/Rockstar.Engine/Statements/Block.cs

@@ -9,6 +9,10 @@ public Block(IEnumerable<Block> blocks) : this(blocks.SelectMany(b => b.Statemen
 	public static Block Empty => new();
 	public bool IsEmpty => !statements.Any();
 
+	public Block Concat(IEnumerable<Statement> tail) {
+		Statements.AddRange(tail);
+		return this;
+	}
 	public Block Concat(IEnumerable<Block> tail) {
 		Statements.AddRange(tail.SelectMany(t => t.Statements));
 		return this;

Starship/Rockstar.Engine/Statements/Statement.cs

@@ -3,4 +3,23 @@
 
 namespace Rockstar.Engine.Statements;
 
-public abstract class Statement(Source source) : Expression(source);
+public abstract class Statement(Source source) : Expression(source) {
+	public Block Concat(IList<Statement> list)
+		=> new Block(new List<Statement> { this }.Concat(list));
+
+	public Block Concat(Statement tail)
+		=> new Block(new List<Statement> { this }.Concat([ tail ]));
+
+};
+
+public class Noop() : Statement(Source.None) {
+	public static Noop Instance => new Noop();
+}
+
+public class Break(Source source) : Statement(source) {
+
+}
+
+public class Continue(Source source) : Statement(source) {
+
+}