diff --git a/src/compiler/Generation/QBE/QBEGenerator.cs b/src/compiler/Generation/QBE/QBEGenerator.cs
index a248a04..0bba87f 100644
--- a/src/compiler/Generation/QBE/QBEGenerator.cs
+++ b/src/compiler/Generation/QBE/QBEGenerator.cs
@@ -195,105 +195,86 @@ public static class QBEGenerator
         return size;
     }
 
-    private static void EmitCopyInto(NubType type, string source, string destination)
+    private static void EmitCopyInto(NubType type, string source, string destinationPointer)
     {
         switch (type)
         {
-            case NubArrayType nubArrayType:
+            case NubComplexType complexType:
             {
-                var size = EmitArraySizeInBytes(nubArrayType, source);
-                var buffer = VarName();
-                _builder.AppendLine($"    {buffer} =l alloc8 {size}");
-                EmitMemcpy(source, buffer, size);
-                EmitStore(type, buffer, destination);
-                break;
+                var size = complexType switch
+                {
+                    NubArrayType nubArrayType => EmitArraySizeInBytes(nubArrayType, source),
+                    NubCStringType => EmitCStringSizeInBytes(source),
+                    NubStringType => EmitStringSizeInBytes(source),
+                    NubStructType nubStructType => SizeOf(nubStructType).ToString(),
+                    _ => throw new ArgumentOutOfRangeException(nameof(complexType))
+                };
+
+                switch (complexType)
+                {
+                    case NubArrayType:
+                    case NubCStringType:
+                    case NubStringType:
+                    {
+                        var buffer = VarName();
+                        _builder.AppendLine($"    {buffer} =l alloc8 {size}");
+                        EmitMemcpy(source, buffer, size);
+                        EmitStore(type, buffer, destinationPointer);
+                        return;
+                    }
+                    case NubStructType:
+                    {
+                        EmitMemcpy(source, destinationPointer, size);
+                        return;
+                    }
+                    default:
+                    {
+                        throw new ArgumentOutOfRangeException(nameof(complexType));
+                    }
+                }
             }
-            case NubCStringType:
+            case NubSimpleType simpleType:
             {
-                var size = EmitCStringSizeInBytes(source);
-                var buffer = VarName();
-                _builder.AppendLine($"    {buffer} =l alloc8 {size}");
-                EmitMemcpy(source, buffer, size);
-                EmitStore(type, buffer, destination);
-                break;
+                EmitStore(simpleType, source, destinationPointer);
+                return;
             }
-            case NubStringType:
-            {
-                var size = EmitStringSizeInBytes(source);
-                var buffer = VarName();
-                _builder.AppendLine($"    {buffer} =l alloc8 {size}");
-                EmitMemcpy(source, buffer, size);
-                EmitStore(type, buffer, destination);
-                break;
-            }
-            case NubStructType nubStructType:
-            {
-                var size = SizeOf(nubStructType);
-                EmitMemcpy(source, destination, size.ToString());
-                break;
-            }
-            case NubPointerType:
-            case NubPrimitiveType:
-            {
-                EmitStore(type, source, destination);
-                break;
-            }
-            case NubVoidType:
-            case NubFuncType:
-            case NubAnyType:
-                throw new NotSupportedException($"Cannot copy type '{type}'");
             default:
+            {
                 throw new ArgumentOutOfRangeException(nameof(type));
+            }
         }
     }
 
     private static string EmitCopy(NubType type, string source)
     {
-        var destination = VarName();
         switch (type)
         {
-            case NubArrayType nubArrayType:
+            case NubComplexType complexType:
             {
-                var size = EmitArraySizeInBytes(nubArrayType, source);
+                var destination = VarName();
+
+                var size = complexType switch
+                {
+                    NubArrayType nubArrayType => EmitArraySizeInBytes(nubArrayType, source),
+                    NubCStringType => EmitCStringSizeInBytes(source),
+                    NubStringType => EmitStringSizeInBytes(source),
+                    NubStructType nubStructType => SizeOf(nubStructType).ToString(),
+                    _ => throw new ArgumentOutOfRangeException(nameof(complexType))
+                };
+
                 _builder.AppendLine($"    {destination} =l alloc8 {size}");
                 EmitMemcpy(source, destination, size);
-                break;
+                return destination;
             }
-            case NubCStringType:
-            {
-                var size = EmitCStringSizeInBytes(source);
-                _builder.AppendLine($"    {destination} =l alloc8 {size}");
-                EmitMemcpy(source, destination, size);
-                break;
-            }
-            case NubStringType:
-            {
-                var size = EmitStringSizeInBytes(source);
-                _builder.AppendLine($"    {destination} =l alloc8 {size}");
-                EmitMemcpy(source, destination, size);
-                break;
-            }
-            case NubStructType nubStructType:
-            {
-                var size = SizeOf(nubStructType);
-                _builder.AppendLine($"    {destination} =l alloc8 {size}");
-                EmitMemcpy(source, destination, size.ToString());
-                break;
-            }
-            case NubPointerType:
-            case NubPrimitiveType:
+            case NubSimpleType:
             {
                 return source;
             }
-            case NubVoidType:
-            case NubFuncType:
-            case NubAnyType:
-                throw new NotSupportedException($"Cannot copy type '{type}'");
             default:
+            {
                 throw new ArgumentOutOfRangeException(nameof(type));
+            }
         }
-
-        return destination;
     }
 
     private static string QBEAssign(NubType type)
diff --git a/src/compiler/Syntax/Typing/NubType.cs b/src/compiler/Syntax/Typing/NubType.cs
index 5cd508a..fd92f65 100644
--- a/src/compiler/Syntax/Typing/NubType.cs
+++ b/src/compiler/Syntax/Typing/NubType.cs
@@ -29,7 +29,10 @@ public abstract class NubType
     public abstract override string ToString();
 }
 
-public class NubCStringType : NubType
+public abstract class NubComplexType : NubType;
+public abstract class NubSimpleType : NubType;
+
+public class NubCStringType : NubComplexType
 {
     public override bool Equals(object? obj)
     {
@@ -47,7 +50,7 @@ public class NubCStringType : NubType
     }
 }
 
-public class NubStringType : NubType
+public class NubStringType : NubComplexType
 {
     public override bool Equals(object? obj)
     {
@@ -65,7 +68,7 @@ public class NubStringType : NubType
     }
 }
 
-public class NubFuncType(NubType returnType, List<NubType> parameters) : NubType
+public class NubFuncType(NubType returnType, List<NubType> parameters) : NubSimpleType
 {
     public NubType ReturnType { get; } = returnType;
     public List<NubType> Parameters { get; } = parameters;
@@ -86,7 +89,7 @@ public class NubFuncType(NubType returnType, List<NubType> parameters) : NubType
     }
 }
 
-public class NubStructType(string @namespace, string name) : NubType
+public class NubStructType(string @namespace, string name) : NubComplexType
 {
     public string Namespace { get; } = @namespace;
     public string Name { get; } = name;
@@ -107,7 +110,7 @@ public class NubStructType(string @namespace, string name) : NubType
     }
 }
 
-public class NubPointerType(NubType baseType) : NubType
+public class NubPointerType(NubType baseType) : NubSimpleType
 {
     public NubType BaseType { get; } = baseType;
 
@@ -127,7 +130,7 @@ public class NubPointerType(NubType baseType) : NubType
     }
 }
 
-public class NubArrayType(NubType elementType) : NubType
+public class NubArrayType(NubType elementType) : NubComplexType
 {
     public NubType ElementType { get; } = elementType;
 
@@ -152,7 +155,7 @@ public class NubArrayType(NubType elementType) : NubType
     }
 }
 
-public class NubAnyType : NubType
+public class NubAnyType : NubSimpleType
 {
     public override string ToString() => "any";
 
@@ -167,7 +170,7 @@ public class NubAnyType : NubType
     }
 }
 
-public class NubVoidType : NubType
+public class NubVoidType : NubSimpleType
 {
     public override string ToString() => "void";
 
@@ -182,7 +185,7 @@ public class NubVoidType : NubType
     }
 }
 
-public class NubPrimitiveType(PrimitiveTypeKind kind) : NubType
+public class NubPrimitiveType(PrimitiveTypeKind kind) : NubSimpleType
 {
     public PrimitiveTypeKind Kind { get; } = kind;