fix: Allow indexable objects to be root of expression

Author: Antaris

libs/FuManchu/Binding/TemplateDataEvaluator.cs

@@ -76,7 +76,22 @@ private static IEnumerable<ExpressionPair> GetRightToLeftExpressions(string expr
 
 		if (dict != null)
 		{
-			success = dict.TryGetValue(key, out value);
+			string lookupKey = key;
+			var periodIndex = key.IndexOf('.');
+			if (periodIndex > -1)
+			{
+				lookupKey = key.Substring(0, periodIndex);
+				key = key.Substring(periodIndex + 1);
+			}
+
+			success = dict.TryGetValue(lookupKey, out value);
+			if (success)
+			{
+				if (key.Length > 0)
+				{
+					return EvalComplexExpression(value!, key);
+				}
+			}
 		}
 		else if (indexableObject != null)
 		{

tests/FuManchu.Tests/Renderer/PartialBlockRendererFacts.cs

@@ -50,4 +50,15 @@ public void CanRenderPartialWithArguments()
 
 		RenderTest(template, expected, new { person = new { forename = "Matthew", surname = "Abbott" } });
 	}
+
+	[Fact]
+	public void CanRenderPartialWithArguments_UsingNestedValue()
+	{
+		HandlebarsService.RegisterPartial("body", "{{person.forename}} {{person.surname}}");
+
+		string template = "{{>body person=person}}";
+		string expected = "Matthew Abbott";
+
+		RenderTest(template, expected, new { person = new { forename = "Matthew", surname = "Abbott" } });
+	}
 }