public override bool VisitClassDecl(Class @class)
{
var originalClass = @class.OriginalClass ?? @class;
Type returnType = Context.ReturnType.Type.Desugar();
// if the class is an abstract impl, use the original for the object map
var qualifiedClass = originalClass.Visit(typePrinter);
var finalType = (returnType.GetFinalPointee() ?? returnType).Desugar();
Class returnedClass;
if (finalType.TryGetClass(out returnedClass) && returnedClass.IsDependent)
{
Context.Return.Write($"({returnType.Visit(typePrinter)}) (object) ");
}
// these two aren't the same for members of templates
if (Context.Function?.OriginalReturnType.Type.Desugar().IsAddress() == true ||
returnType.IsAddress())
{
Context.Return.Write(HandleReturnedPointer(@class, qualifiedClass));
}
else
{
if (Context.MarshalKind == MarshalKind.NativeField ||
Context.MarshalKind == MarshalKind.Variable ||
Context.MarshalKind == MarshalKind.ReturnVariableArray ||
!originalClass.HasNonTrivialDestructor)
{
Context.Return.Write($"{qualifiedClass}.{Helpers.CreateInstanceIdentifier}({Context.ReturnVarName})");
}
else
{
Context.Before.WriteLine($@"var __{Context.ReturnVarName} = {
qualifiedClass}.{Helpers.CreateInstanceIdentifier}({Context.ReturnVarName});");
Method dtor = originalClass.Destructors.First();
if (dtor.IsVirtual)
{
var i = VTables.GetVTableIndex(dtor);
int vtableIndex = 0;
if (Context.Context.ParserOptions.IsMicrosoftAbi)
{
vtableIndex = @class.Layout.VFTables.IndexOf(@class.Layout.VFTables.First(
v => v.Layout.Components.Any(c => c.Method == dtor)));
}
string instance = $"new {typePrinter.IntPtrType}(&{Context.ReturnVarName})";
Context.Before.WriteLine($@"var __vtables = new IntPtr[] {{ {
string.Join(", ", originalClass.Layout.VTablePointers.Select(
x => $"*({typePrinter.IntPtrType}*) ({instance} + {x.Offset})"))} }};");
Context.Before.WriteLine($@"var __slot = *({typePrinter.IntPtrType}*) (__vtables[{
vtableIndex}] + {i} * sizeof({typePrinter.IntPtrType}));");
Context.Before.Write($"Marshal.GetDelegateForFunctionPointer<{dtor.FunctionType}>(__slot)({instance}");
if (dtor.GatherInternalParams(Context.Context.ParserOptions.IsItaniumLikeAbi).Count > 1)
{
Context.Before.Write(", 0");
}
Context.Before.WriteLine(");");
}
else
{
string suffix = string.Empty;
var specialization = @class as ClassTemplateSpecialization;
if (specialization != null)
{
suffix = Helpers.GetSuffixFor(specialization);
}
Context.Before.WriteLine($@"{typePrinter.PrintNative(originalClass)}.dtor{
suffix}(new {typePrinter.IntPtrType}(&{Context.ReturnVarName}));");
}
Context.Return.Write($"__{Context.ReturnVarName}");
}
}
return(true);
}
