[ResultBuilder] Add AnyGraphContent<NodeID>

Author: li3zhen1

Sources/Grape/Contents/AnyGraphContent.swift

@@ -0,0 +1,17 @@
+@usableFromInline
+struct AnyGraphContent<NodeID: Hashable>: GraphContent {
+
+    @usableFromInline
+    let storage: any GraphContent<NodeID>
+
+    @inlinable
+    init(_ storage: any GraphContent<NodeID>) {
+        self.storage = storage
+    }
+
+    @inlinable
+    func _attachToGraphRenderingContext(_ context: inout _GraphRenderingContext<NodeID>) {
+        storage._attachToGraphRenderingContext(&context)
+    }
+
+}

Tests/GrapeTests/ContentBuilderTests.swift

@@ -29,7 +29,9 @@ final class ContentBuilderTests: XCTestCase {
 
             NodeMark(id: 3)
             NodeMark(id: 4)
-            NodeMark(id: 5)
+            AnyGraphContent(
+                NodeMark(id: 5)
+            )
         }
     }