Directors with C# attributes?

> Thanks for writing, William.
>
> The problem is that the director delegates aren't tagged with the
> attributes.  For example:
>
> public virtual void BarClass([MarshalAs(UnmanagedType.CustomMarshaler,
> MarshalTypeRef=typeof(ManagedChatApiWrapper.MarshalPtrToUtf8))]string
> arg1) {
> //...
> }
>
> private void SwigDirectorFooCallback(string arg1) {
>     FooCallback(arg1);
> }
>
> public delegate void SwigDelegateModuleName_0(string arg1);
>
>
> That code is generated by SWIG for a sample function, even though in my
> interface file, I've done this:
>
> %typemap(cstype,
>          inattributes="[MarshalAs(UnmanagedType.CustomMarshaler,
> MarshalTypeRef=typeof(ManagedChatApiWrapper.MarshalPtrToUtf8))]",
>          outattributes="[return:
> MarshalAs(UnmanagedType.CustomMarshaler,
> MarshalTypeRef=typeof(ManagedChatApiWrapper.MarshalPtrToUtf8))]") const
> std::string & "string"
>
> %typemap(imtype,
>          inattributes="[MarshalAs(UnmanagedType.CustomMarshaler,
> MarshalTypeRef=typeof(ManagedChatApiWrapper.MarshalPtrToUtf8))]",
>          outattributes="[return:
> MarshalAs(UnmanagedType.CustomMarshaler,
> MarshalTypeRef=typeof(ManagedChatApiWrapper.MarshalPtrToUtf8))]") const
> std::string & "string"
>
> %feature("director") BarClass;
>
>
>
> As you can see, the delegate signature does not have the attributes on
> it that I need.  Only the virtual function (which is not the function
> that is directly called by the C++ code) has the attributes.  What this
> means is that the C++ code calls the delegate without any explicit
> marshalling, which causes default marshalling to be used.  This wreaks
> havoc on my UTF-8 encoded strings.
>
> I believe I need the delegate signature to look like this:
>
> private void
> SwigDirectorFooCallback([MarshalAs(UnmanagedType.CustomMarshaler,
> MarshalTypeRef=typeof(ManagedChatApiWrapper.MarshalPtrToUtf8))]string
> arg1) {
>     FooCallback(arg1);
> }
>
> public delegate void
> SwigDelegateModuleName_0([MarshalAs(UnmanagedType.CustomMarshaler,
> MarshalTypeRef=typeof(ManagedChatApiWrapper.MarshalPtrToUtf8))]string
> arg1);
>
>
>
> Thanks for your help!
>
> - Philip
>
> -----Original Message-----
> From: William Fulton [mailto:william@...] On Behalf Of
> William S Fulton
> Sent: Tuesday, January 15, 2008 5:07 PM
> To: Philip Flesher
> Cc: swig-user@...
> Subject: Re: [Swig-user] Directors with C# attributes?
>
> Philip Flesher wrote:
>> When C++ code calls back into C# to make a virtual method call (using
>> the directors feature), I'm having a difficult time figuring out how
> to
>> enforce a MarshalAs attribute on the director functions.  I know how
> to
>> use imtype's and cstype's inattribute/outattribute to put C#
> attributes
>> on the intermediate (PINVOKE) and wrapper classes, but I don't see
>> anywhere in the documentation that it discusses putting C# attributes
> on
>> director functions.  This seems critical in order to have full
>> functionality, so I must be missing something.
> The director methods use the types in the cstype and imtype typemaps.
> They also use the inattributes and outattributes specified in the cstype
>
> and imtype typemaps. The documentation mentions the cstype and imtype
> inattribute and outattribute typemap attributes. I just checked that the
>
> inattribute and outattribute code gets generated in the correct places
> for directors. It all looks okay, but didn't go as far as running any
> code. If you have any problems can you elaborate?
>
> William
>
> -------------------------------------------------------------------------
> This SF.net email is sponsored by: Microsoft
> Defy all challenges. Microsoft(R) Visual Studio 2008.
> http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/
> _______________________________________________
> Swig-user mailing list
> Swig-user@...
> https://lists.sourceforge.net/lists/listinfo/swig-user
>

> Thanks for writing, William.
>
> The problem is that the director delegates aren't tagged with the
> attributes.  For example:
>
> public virtual void BarClass([MarshalAs(UnmanagedType.CustomMarshaler,
> MarshalTypeRef=typeof(ManagedChatApiWrapper.MarshalPtrToUtf8))]string
> arg1) {
> //...
> }
>
> private void SwigDirectorFooCallback(string arg1) {
>     FooCallback(arg1);
> }
>
> public delegate void SwigDelegateModuleName_0(string arg1);
>
>
> That code is generated by SWIG for a sample function, even though in

> means is that the C++ code calls the delegate without any explicit
> marshalling, which causes default marshalling to be used.  This wreaks
> havoc on my UTF-8 encoded strings.
>
> I believe I need the delegate signature to look like this:
>
> private void
> SwigDirectorFooCallback([MarshalAs(UnmanagedType.CustomMarshaler,
> MarshalTypeRef=typeof(ManagedChatApiWrapper.MarshalPtrToUtf8))]string
> arg1) {
>     FooCallback(arg1);
> }
>
> public delegate void
> SwigDelegateModuleName_0([MarshalAs(UnmanagedType.CustomMarshaler,
> MarshalTypeRef=typeof(ManagedChatApiWrapper.MarshalPtrToUtf8))]string
> arg1);
>
>
>
> Thanks for your help!
>
> - Philip
>
> -----Original Message-----
> From: William Fulton [mailto:william@...] On Behalf Of
> William S Fulton
> Sent: Tuesday, January 15, 2008 5:07 PM
> To: Philip Flesher
> Cc: swig-user@...
> Subject: Re: [Swig-user] Directors with C# attributes?
>
> Philip Flesher wrote:
>> When C++ code calls back into C# to make a virtual method call (using

>> the directors feature), I'm having a difficult time figuring out how
> to
>> enforce a MarshalAs attribute on the director functions.  I know how
> to
>> use imtype's and cstype's inattribute/outattribute to put C#
> attributes
>> on the intermediate (PINVOKE) and wrapper classes, but I don't see
>> anywhere in the documentation that it discusses putting C# attributes
> on
>> director functions.  This seems critical in order to have full
>> functionality, so I must be missing something.
> The director methods use the types in the cstype and imtype typemaps.
> They also use the inattributes and outattributes specified in the

> Hi William,
>
> The 'directorinattributes' attribute seems to be present (and working) in
> SWIG 1.3.36 but I notice it's not mentioned in the 1.3 docs
> http://www.swig.org/Doc1.3/CSharp.html#CSharp. Has this been adopted as an
> officially supported feature (I hope it has) or is it not documented for a
> reason?
>
> Thanks,
> Evan
>
>
> wsfulton wrote:
>> Your code is a bit hard to follow, I need to see the source, not just
>> the generated code. However, I think I've got it now and can see that
>> there is no way to set a C# attribute on the delegate methods. I reckon
>> we need a new type of attribute for this as the imtype inattributes and
>> outattributes will need to be different. I have checked in some code
>> which allows you to use new attributes, 'directorinattributes' and
>> 'directoroutattributes' in the imtype typemap. Here is the test I used
>> (for int):
>>
>> %typemap(imtype,
>>           inattributes="/*[imtypeinattributeint]*/",
>>           outattributes="/*[imtypeoutattributeint]*/",
>>           directorinattributes="/*[imtypedirectorinattributeint]*/",
>>           directoroutattributes="/*[imtypedirectoroutattributeint]*/",
>>           out="/*custom imtype-out*/ int") int "/*custom imtype*/ int"
>>
>> Can you try it out and let me know if it works and even better, provide
>> me your typemaps with a testcase for future regression testing?
>>
>> William
>>
>>
>> Philip Flesher wrote:
>>> Thanks for writing, William.
>>>
>>> The problem is that the director delegates aren't tagged with the
>>> attributes.  For example:
>>>
>>> public virtual void BarClass([MarshalAs(UnmanagedType.CustomMarshaler,
>>> MarshalTypeRef=typeof(ManagedChatApiWrapper.MarshalPtrToUtf8))]string
>>> arg1) {
>>> //...
>>> }
>>>
>>> private void SwigDirectorFooCallback(string arg1) {
>>>     FooCallback(arg1);
>>> }
>>>
>>> public delegate void SwigDelegateModuleName_0(string arg1);
>>>
>>>
>>> That code is generated by SWIG for a sample function, even though in my
>>> interface file, I've done this:
>>>
>>> %typemap(cstype,
>>>          inattributes="[MarshalAs(UnmanagedType.CustomMarshaler,
>>> MarshalTypeRef=typeof(ManagedChatApiWrapper.MarshalPtrToUtf8))]",
>>>          outattributes="[return:
>>> MarshalAs(UnmanagedType.CustomMarshaler,
>>> MarshalTypeRef=typeof(ManagedChatApiWrapper.MarshalPtrToUtf8))]") const
>>> std::string & "string"
>>>
>>> %typemap(imtype,
>>>          inattributes="[MarshalAs(UnmanagedType.CustomMarshaler,
>>> MarshalTypeRef=typeof(ManagedChatApiWrapper.MarshalPtrToUtf8))]",
>>>          outattributes="[return:
>>> MarshalAs(UnmanagedType.CustomMarshaler,
>>> MarshalTypeRef=typeof(ManagedChatApiWrapper.MarshalPtrToUtf8))]") const
>>> std::string & "string"
>>>
>>> %feature("director") BarClass;
>>>
>>>
>>>
>>> As you can see, the delegate signature does not have the attributes on
>>> it that I need.  Only the virtual function (which is not the function
>>> that is directly called by the C++ code) has the attributes.  What this
>>> means is that the C++ code calls the delegate without any explicit
>>> marshalling, which causes default marshalling to be used.  This wreaks
>>> havoc on my UTF-8 encoded strings.
>>>
>>> I believe I need the delegate signature to look like this:
>>>
>>> private void
>>> SwigDirectorFooCallback([MarshalAs(UnmanagedType.CustomMarshaler,
>>> MarshalTypeRef=typeof(ManagedChatApiWrapper.MarshalPtrToUtf8))]string
>>> arg1) {
>>>     FooCallback(arg1);
>>> }
>>>
>>> public delegate void
>>> SwigDelegateModuleName_0([MarshalAs(UnmanagedType.CustomMarshaler,
>>> MarshalTypeRef=typeof(ManagedChatApiWrapper.MarshalPtrToUtf8))]string
>>> arg1);
>>>
>>>
>>>
>>> Thanks for your help!
>>>
>>> - Philip
>>>
>>> -----Original Message-----
>>> From: William Fulton [mailto:william@...] On Behalf Of
>>> William S Fulton
>>> Sent: Tuesday, January 15, 2008 5:07 PM
>>> To: Philip Flesher
>>> Cc: swig-user@...
>>> Subject: Re: [Swig-user] Directors with C# attributes?
>>>
>>> Philip Flesher wrote:
>>>> When C++ code calls back into C# to make a virtual method call (using
>>>> the directors feature), I'm having a difficult time figuring out how
>>> to
>>>> enforce a MarshalAs attribute on the director functions.  I know how
>>> to
>>>> use imtype's and cstype's inattribute/outattribute to put C#
>>> attributes
>>>> on the intermediate (PINVOKE) and wrapper classes, but I don't see
>>>> anywhere in the documentation that it discusses putting C# attributes
>>> on
>>>> director functions.  This seems critical in order to have full
>>>> functionality, so I must be missing something.
>>> The director methods use the types in the cstype and imtype typemaps.
>>> They also use the inattributes and outattributes specified in the cstype
>>>
>>> and imtype typemaps. The documentation mentions the cstype and imtype
>>> inattribute and outattribute typemap attributes. I just checked that the
>>>
>>> inattribute and outattribute code gets generated in the correct places
>>> for directors. It all looks okay, but didn't go as far as running any
>>> code. If you have any problems can you elaborate?
>>>
>>> William
>>>
>>> -------------------------------------------------------------------------
>>> This SF.net email is sponsored by: Microsoft
>>> Defy all challenges. Microsoft(R) Visual Studio 2008.
>>> http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/
>>> _______________________________________________
>>> Swig-user mailing list
>>> Swig-user@...
>>> https://lists.sourceforge.net/lists/listinfo/swig-user
>>>
>>
>> -------------------------------------------------------------------------
>> This SF.net email is sponsored by: Microsoft
>> Defy all challenges. Microsoft(R) Visual Studio 2008.
>> http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/
>> _______________________________________________
>> Swig-user mailing list
>> Swig-user@...
>> https://lists.sourceforge.net/lists/listinfo/swig-user
>>
>>
>