feat: temporary grammar

InkBlot/ParseHierarchy/Content.cs

@@ -1,3 +1,3 @@
 namespace InkBlot.ParseHierarchy;
 
-public record Content(string Text) : StoryNode;
+public record Content(string Text) : IStoryNode;

InkBlot/ParseHierarchy/IStoryNode.cs

@@ -3,4 +3,4 @@
 /// <summary>
 ///     Any node in the parsed story
 /// </summary>
-public record StoryNode;
+public interface IStoryNode;

InkBlot/ParseHierarchy/MultiDivert.cs

@@ -1,3 +1,27 @@
-namespace InkBlot.ParseHierarchy;
+using OneOf;
 
-public record MultiDivert : StoryNode;
+namespace InkBlot.ParseHierarchy;
+
+[GenerateOneOf]
+public partial class
+    MultiDivert : OneOfBase<ThreadDivert, DivertsListWithReturnFromTunnel, DivertsListWithoutReturnFromTunnel>,
+    IStoryNode
+{
+}
+
+public record Identifier(string[] Elements /* TODO: expressions */);
+
+// <- thread_name
+public record ThreadDivert(Identifier Identifier) : IStoryNode;
+
+// -> ... ->->                      // return from tunnel
+// or
+// -> ... ->-> tunnelReplacement    // return from tunnel, but replace destination
+public record DivertsListWithReturnFromTunnel(Identifier[] Identifiers, Identifier? TunnelReplacement)
+    : IStoryNode;
+
+// -> ... -> div             // not a tunnel
+// or
+// -> ... -> div ->          // is tunnel
+public record DivertsListWithoutReturnFromTunnel(Identifier[] Identifiers, bool IsTunnel)
+    : IStoryNode;

InkBlot/ParseHierarchy/Story.cs

@@ -1,3 +1,3 @@
 namespace InkBlot.ParseHierarchy;
 
-public record Story(IEnumerable<StoryNode> StoryNodes) : StoryNode;
+public record Story(IEnumerable<IStoryNode> StoryNodes) : IStoryNode;