...

example/src/main.nub

@@ -16,18 +16,18 @@ struct Human : Printable, Stringable
 
     func str(): cstring
     {
-        return this^.name
+        return this.name
     }
 
     func print()
     {
-        puts(this^.str())
+        puts(this.str())
     }
 }
 
 func main(args: []cstring): i64
 {
-    let human: Stringable = alloc Human {
+    let human = alloc Human {
         name = "oliver"
     }
 

src/compiler/NubLang.CLI/Program.cs

@@ -117,9 +117,10 @@ var typedDefinitionTable = new TypedDefinitionTable(typedSyntaxTrees);
 
 var objectFiles = new List<string>();
 
-foreach (var syntaxTree in typedSyntaxTrees)
+for (var i = 0; i < typedSyntaxTrees.Count; i++)
 {
-    var outFileName = HexString.CreateUnique(8);
+    var syntaxTree = typedSyntaxTrees[i];
+    var outFileName = Path.GetFileNameWithoutExtension(options.Files[i].Path);
 
     var generator = new QBEGenerator(syntaxTree, typedDefinitionTable);
     var ssa = generator.Emit();

src/compiler/NubLang/Generation/QBE/QBEGenerator.Expression.cs

@@ -110,7 +110,7 @@ public partial class QBEGenerator
         var value = EmitExpression(addressOf.Expression);
         if (value.Kind != ValKind.Pointer)
         {
-            throw new UnreachableException("Tried to take address of non-pointer type. This should have been causht in the type checker");
+            throw new UnreachableException("Tried to take address of non-pointer type. This should have been caught in the type checker");
         }
 
         return new Val(value.Name, addressOf.Type, ValKind.Direct);
@@ -333,11 +333,6 @@ public partial class QBEGenerator
             _writer.Indented($"{destination} =l alloc8 {size}");
         }
 
-        // if (structDef.InterfaceImplementations.Any())
-        // {
-        //     _writer.Indented($"storel {destination}, {StructVtableName(structDef.Name)}");
-        // }
-
         foreach (var field in structDef.Fields)
         {
             if (!structInitializer.Initializers.TryGetValue(field.Name, out var valueExpression))
@@ -345,7 +340,10 @@ public partial class QBEGenerator
                 valueExpression = field.Value.Value;
             }
 
-            Debug.Assert(valueExpression != null);
+            if (valueExpression == null)
+            {
+                throw new UnreachableException("Value of field in uninitialized. This should have been caught in the type checker");
+            }
 
             var offset = TmpName();
             _writer.Indented($"{offset} =l add {destination}, {OffsetOf(structDef, field.Name)}");
@@ -423,13 +421,12 @@ public partial class QBEGenerator
 
     private Val EmitStructFuncAccess(StructFuncAccessNode structFuncAccess)
     {
-        var target = EmitExpression(structFuncAccess.Target);
+        var target = EmitUnwrap(EmitExpression(structFuncAccess.Target));
-        Debug.Assert(target.Kind == ValKind.Pointer);
 
         var structDef = _definitionTable.LookupStruct(structFuncAccess.StructType.Name);
         var func = StructFuncName(structDef.Name, structFuncAccess.Func);
 
-        return new Val(func, structFuncAccess.Type, ValKind.Direct, target.Name);
+        return new Val(func, structFuncAccess.Type, ValKind.Direct, target);
     }
 
     private Val EmitInterfaceFuncAccess(InterfaceFuncAccessNode interfaceFuncAccess)
@@ -449,13 +446,16 @@ public partial class QBEGenerator
         var func = TmpName();
         _writer.Indented($"{func} =l loadl {funcOffset}");
 
+        var dataPointer = TmpName();
+        _writer.Indented($"{dataPointer} =l add {target}, 8");
+
         var data = TmpName();
-        _writer.Indented($"{data} =l add {target}, 8");
+        _writer.Indented($"{data} =l loadl {dataPointer}");
 
         return new Val(func, interfaceFuncAccess.Type, ValKind.Direct, data);
     }
 
-    private Val EmitInterfaceInitializer(InterfaceInitializerNode interfaceInitializer)
+    private Val EmitInterfaceInitializer(InterfaceInitializerNode interfaceInitializer, string? destination = null)
     {
         var implementation = EmitUnwrap(EmitExpression(interfaceInitializer.Implementation));
 
@@ -470,27 +470,28 @@ public partial class QBEGenerator
             vtableOffset += interfaceImplementation.Functions.Count * 8;
         }
 
-        var result = TmpName();
+        if (destination == null)
-        _writer.Indented($"{result} =l alloc8 16");
+        {
+            destination = TmpName();
+            _writer.Indented($"{destination} =l alloc8 {SizeOf(interfaceInitializer.InterfaceType)}");
+        }
 
         var interfaceVtablePointer = TmpName();
         _writer.Indented($"{interfaceVtablePointer} =l add {StructVtableName(interfaceInitializer.StructType.Name)}, {vtableOffset}");
-        _writer.Indented($"storel {interfaceVtablePointer}, {result}");
+        _writer.Indented($"storel {interfaceVtablePointer}, {destination}");
 
         var objectPointer = TmpName();
-        _writer.Indented($"{objectPointer} =l add {result}, 8");
+        _writer.Indented($"{objectPointer} =l add {destination}, 8");
         _writer.Indented($"storel {implementation}, {objectPointer}");
 
-        return new Val(result, interfaceInitializer.InterfaceType, ValKind.Direct);
+        return new Val(destination, interfaceInitializer.InterfaceType, ValKind.Direct);
     }
 
     private Val EmitFuncCall(FuncCallNode funcCall)
     {
         var expression = EmitExpression(funcCall.Expression);
-        var funcPointer = EmitUnwrap(expression);
 
         var parameterStrings = new List<string>();
-
         if (expression.ThisArg != null)
         {
             parameterStrings.Add($"l {expression.ThisArg}");
@@ -502,6 +503,7 @@ public partial class QBEGenerator
             parameterStrings.Add($"{FuncQBETypeName(parameter.Type)} {copy}");
         }
 
+        var funcPointer = EmitUnwrap(expression);
         if (funcCall.Type is VoidTypeNode)
         {
             _writer.Indented($"call {funcPointer}({string.Join(", ", parameterStrings)})");

src/compiler/NubLang/Generation/QBE/QBEGenerator.Statement.cs

@@ -41,7 +41,11 @@ public partial class QBEGenerator
     private void EmitAssignment(AssignmentNode assignment)
     {
         var destination = EmitExpression(assignment.Target);
-        Debug.Assert(destination.Kind == ValKind.Pointer);
+        if (destination.Kind != ValKind.Pointer)
+        {
+            throw new UnreachableException("Destination of assignment must be a pointer. This should be caught in the type checker");
+        }
+
         EmitCopyIntoOrInitialize(assignment.Value, destination.Name);
     }
 

src/compiler/NubLang/Generation/QBE/QBEGenerator.cs

@@ -224,6 +224,11 @@ public partial class QBEGenerator
                 EmitStructInitializer(structInitializer, destinationPointer);
                 return true;
             }
+            case InterfaceInitializerNode interfaceInitializer:
+            {
+                EmitInterfaceInitializer(interfaceInitializer, destinationPointer);
+                return true;
+            }
             case LiteralNode { Kind: LiteralKind.String } literal:
             {
                 EmitStore(source.Type, EmitUnwrap(EmitLiteral(literal)), destinationPointer);
@@ -250,9 +255,9 @@ public partial class QBEGenerator
         }
         else
         {
-            if (complexType is StructTypeNode structType)
+            if (complexType is StructTypeNode or InterfaceTypeNode)
             {
-                EmitMemcpy(value, destinationPointer, SizeOf(structType).ToString());
+                EmitMemcpy(value, destinationPointer, SizeOf(complexType).ToString());
             }
             else
             {
@@ -261,7 +266,6 @@ public partial class QBEGenerator
                     ArrayTypeNode arrayType => EmitArraySizeInBytes(arrayType, value),
                     CStringTypeNode => EmitCStringSizeInBytes(value),
                     StringTypeNode => EmitStringSizeInBytes(value),
-                    InterfaceTypeNode => 16.ToString(),
                     _ => throw new ArgumentOutOfRangeException(nameof(source.Type))
                 };
 
@@ -311,7 +315,7 @@ public partial class QBEGenerator
             ArrayTypeNode arrayType => EmitArraySizeInBytes(arrayType, value),
             CStringTypeNode => EmitCStringSizeInBytes(value),
             StringTypeNode => EmitStringSizeInBytes(value),
-            InterfaceTypeNode => 16.ToString(),
+            InterfaceTypeNode interfaceType => SizeOf(interfaceType).ToString(),
             StructTypeNode structType => SizeOf(structType).ToString(),
             _ => throw new ArgumentOutOfRangeException(nameof(source.Type))
         };
@@ -486,11 +490,6 @@ public partial class QBEGenerator
     {
         var offset = 0;
 
-        // if (structType.InterfaceImplementations.Any())
-        // {
-        //     offset = 8;
-        // }
-
         foreach (var field in structType.Fields)
         {
             var fieldAlignment = AlignmentOf(field);

src/compiler/NubLang/Parsing/Parser.cs

@@ -73,7 +73,7 @@ public sealed class Parser
 
         if (thisArg != null)
         {
-            parameters.Add(new FuncParameterSyntax([], "this", new PointerTypeSyntax([], thisArg)));
+            parameters.Add(new FuncParameterSyntax([], "this", thisArg));
         }
 
         ExpectSymbol(Symbol.OpenParen);