Fix array creation implicit size variable conversion

- Fix issues when you pass a non-int32 variable into an array creation expression, reported by Ureishi

Author: MerlinVR

Assets/UdonSharp/Editor/UdonSharpASTVisitor.cs

@@ -476,10 +476,26 @@ public override void VisitArrayCreationExpression(ArrayCreationExpressionSyntax
                 }
                 else
                 {
+                    SymbolDefinition capturedRank;
+
                     using (ExpressionCaptureScope rankCapture = new ExpressionCaptureScope(visitorContext, null))
                     {
                         Visit(node.Type.RankSpecifiers[0]);
-                        arrayRankSymbol = rankCapture.ExecuteGet();
+                        capturedRank = rankCapture.ExecuteGet();
+                    }
+
+                    if (capturedRank.symbolCsType == typeof(int))
+                    {
+                        arrayRankSymbol = capturedRank;
+                    }
+                    else
+                    {
+                        using (ExpressionCaptureScope convertScope = new ExpressionCaptureScope(visitorContext, null))
+                        {
+                            arrayRankSymbol = visitorContext.topTable.CreateUnnamedSymbol(typeof(int), SymbolDeclTypeFlags.Internal);
+                            convertScope.SetToLocalSymbol(arrayRankSymbol);
+                            convertScope.ExecuteSet(capturedRank, true);
+                        }
                     }
                 }
 

Assets/UdonSharp/Tests/TestScripts/Core/ArrayTest.cs

@@ -86,6 +86,19 @@ public void ExecuteTests()
 
             tester.TestAssertion("Unity VideoPlayer array", unityVideoPlayerArray[0] != null && unityVideoPlayerArray[1] != null);
             tester.TestAssertion("Base VRCStation array", baseVideoPlayerArray[0] != null && baseVideoPlayerArray[1] != null);
+
+            // Test implicit array rank conversions
+            float[] myFloatArr = new float[20U];
+            tester.TestAssertion("Array size implicit conversion 1", myFloatArr.Length == 20);
+
+            uint arrSize = 4;
+            myFloatArr = new float[arrSize];
+            tester.TestAssertion("Array size implicit conversion 2", myFloatArr.Length == 4);
+
+            byte arrSize2 = 30;
+            myFloatArr = new float[arrSize2];
+
+            tester.TestAssertion("Array size implicit conversion 3", myFloatArr.Length == 30);
         }
     }
 }