fixed classic array creation with empty initialized

src/ExpressiveSharp.Generator/Emitter/ExpressionTreeEmitter.cs

@@ -1228,8 +1228,9 @@ private string EmitObjectCreation(IObjectCreationOperation creation)
                 }
                 else
                 {
-                    var bindingsExpr = string.Join(", ", bindingVars);
-                    AppendLine($"var {resultVar} = {Expr}.MemberInit({newVar}, {bindingsExpr});");
+                    AppendLine(bindingVars.Count == 0
+                        ? $"var {resultVar} = {Expr}.MemberInit({newVar});"
+                        : $"var {resultVar} = {Expr}.MemberInit({newVar}, {string.Join(", ", bindingVars)});");
                 }
             }
             else
@@ -1385,8 +1386,9 @@ private string EmitArrayCreation(IArrayCreationOperation arrayCreate)
                 elementVars.Add(EmitOperation(element));
             }
 
-            var elementsExpr = string.Join(", ", elementVars);
-            AppendLine($"var {resultVar} = {Expr}.NewArrayInit(typeof({elementTypeFqn}), {elementsExpr});");
+            AppendLine(elementVars.Count == 0
+                ? $"var {resultVar} = {Expr}.NewArrayInit(typeof({elementTypeFqn}));"
+                : $"var {resultVar} = {Expr}.NewArrayInit(typeof({elementTypeFqn}), {string.Join(", ", elementVars)});");
         }
         else
         {
@@ -1396,8 +1398,9 @@ private string EmitArrayCreation(IArrayCreationOperation arrayCreate)
                 dimVars.Add(EmitOperation(dim));
             }
 
-            var dimsExpr = string.Join(", ", dimVars);
-            AppendLine($"var {resultVar} = {Expr}.NewArrayBounds(typeof({elementTypeFqn}), {dimsExpr});");
+            AppendLine(dimVars.Count == 0
+                ? $"var {resultVar} = {Expr}.NewArrayBounds(typeof({elementTypeFqn}));"
+                : $"var {resultVar} = {Expr}.NewArrayBounds(typeof({elementTypeFqn}), {string.Join(", ", dimVars)});");
         }
 
         return resultVar;

tests/ExpressiveSharp.Generator.Tests/ExpressiveGenerator/CollectionExpressionTests.cs

@@ -155,4 +155,23 @@ class C {
 
         return Verifier.Verify(result.GeneratedTrees[0].ToString());
     }
+
+    [TestMethod]
+    public void EmptyArrayInitializer_GeneratedCodeCompiles()
+    {
+        var compilation = CreateCompilation(
+            """
+            namespace Foo {
+                class C {
+                    [Expressive]
+                    public static int[] Empty() => new int[] { };
+                }
+            }
+            """);
+
+        var result = RunExpressiveGenerator(compilation);
+
+        Assert.AreEqual(1, result.GeneratedTrees.Length);
+        Assert.IsFalse(result.Diagnostics.Any(d => d.Severity == Microsoft.CodeAnalysis.DiagnosticSeverity.Error));
+    }
 }