I got msgpack and was trying out an example (compare_json.d) and I get an unresolved error.
Not sure what I'm doing wrong...
https://github.com/msgpack/msgpack-d/blob/master/src/msgpack.d

I think length is built in for associative arrays?

Thanks
Dan

The error and lines of code is:
-----

/tmp/.rd.../objs/compare_json.o: In function `const(@trusted void function(ref msgpack.Packer!(std.array.Appender!(ubyte[]).Appender).Packer)) msgpack.Value.toMsgpack!(msgpack.Packer!(std.array.Appender!(ubyte[]).Appender).Packer).toMsgpack':
/home/dbdavidson/stage/msgpack-d/src/msgpack.d:2967: undefined reference to `@property ulong object.AssociativeArray!(msgpack.Value, const(msgpack.Value)).AssociativeArray.length()'


        case Type.array:
            packer.beginArray(via.array.length);
            foreach (elem; via.array)
                elem.toMsgpack(packer);
            break;
        case Type.map:
>>>         packer.beginMap(via.map.length);
            foreach (key, value; via.map) {
                key.toMsgpack(packer);
                value.toMsgpack(packer);
            }
            break;
        }

-----

On Tuesday, 23 October 2012 at 13:40:00 UTC, Dan wrote:
> /tmp/.rd.../objs/compare_json.o: In function `const(@trusted void function(ref msgpack.Packer!(std.array.Appender!(ubyte[]).Appender).Packer)) msgpack.Value.toMsgpack!(msgpack.Packer!(std.array.Appender!(ubyte[]).Appender).Packer).toMsgpack':
> /home/dbdavidson/stage/msgpack-d/src/msgpack.d:2967: undefined reference to `@property ulong object.AssociativeArray!(msgpack.Value, const(msgpack.Value)).AssociativeArray.length()'
>

No answer yet, but the errors look very similar to those run into here:

http://www.digitalmars.com/d/archives/digitalmars/D/Something_wrong_with_dmd_s_-c_command_162601.html

back in March. Wish I knew how that was resolved. When I tried to use msgpack my steps were:

- git clone the msgpack project
- edit my dmd.conf file and add a -I to the src folder of msgpack.
- run rdmd on the .../example/compare_json.d

Thanks
Dan

On Wednesday, 24 October 2012 at 11:19:08 UTC, Dan wrote:
> No answer yet, but the errors look very similar to those run into here:
>
> http://www.digitalmars.com/d/archives/digitalmars/D/Something_wrong_with_dmd_s_-c_command_162601.html
>
> back in March. Wish I knew how that was resolved. When I tried to use msgpack my steps were:
>
> - git clone the msgpack project
> - edit my dmd.conf file and add a -I to the src folder of msgpack.
> - run rdmd on the .../example/compare_json.d
>
> Thanks
> Dan

It is a linker error. You need to compile the msgpack.d file and tell the linker where to find it. The simplest way is to just throw the file on the command line.

dmd compare_json.d msgpack.d

This kind of have some details about what you are doing:

http://stackoverflow.com/questions/6191772/calling-c-c-functions-in-dynamic-and-static-libraries-in-d/6194392#6194392

On Thursday, 25 October 2012 at 17:59:40 UTC, Jesse Phillips wrote:
>
> It is a linker error. You need to compile the msgpack.d file and tell the linker where to find it. The simplest way is to just throw the file on the command line.
>
> dmd compare_json.d msgpack.d
>

Thanks. I tried your suggestion but had no luck (same link error). It could be my command is still wrong. Or maybe it is something related to associative arrays? The reason I suggest this is there is another example in the directory (custom.d) which uses functionality in msgpack and builds and runs fine without my specifying msgpack.d on the command line.

Thanks
Dan

dmd  /.../msgpack-d/example/compare_json.d  /.../msgpack-d/src/msgpack.d

compare_json.o: In function `_D7msgpack5Value83__T9toMsgpackTS7msgpack50__T6PackerTS3std5array16__T8AppenderTAhZ8AppenderZ6PackerZ9toMsgpackMxFNeKS7msgpack50__T6PackerTS3std5array16__T8AppenderTAhZ8AppenderZ6PackerZv':
/.../msgpack-d/src/msgpack.d:(.text._D7msgpack5Value83__T9toMsgpackTS7msgpack50__T6PackerTS3std5array16__T8AppenderTAhZ8AppenderZ6PackerZ9toMsgpackMxFNeKS7msgpack50__T6PackerTS3std5array16__T8AppenderTAhZ8AppenderZ6PackerZv+0x1aa): undefined reference to `_D6object55__T16AssociativeArrayTS7msgpack5ValueTxS7msgpack5ValueZ16AssociativeArray6lengthMFNdZm'
collect2: ld returned 1 exit status
--- errorlevel 1

Hmm, I can reproduce. It is caused by the call to pack in function 2.

    void f2()
    {
        unpack(pack(mpObj));
    }

I get the feeling this may be a compiler bug, I'm not seeing anything used that isn't part of those two files or Phobos.

Hi Dan,

Sorry for the delay.
Your mail is referred to as spam in Gmail...

I also got same error in compare_json.d,
and I agree with Jesse.

"pragma(msg, typeof(via.map.length));" returns 'ulong' during compilation.
But the linker error occurred in the runtime.

Now, I have no idea to resolve it in library.
Give me some time to think it over.


Thanks,
Masahiro

On Thursday, 25 October 2012 at 18:50:55 UTC, Dan wrote:
> On Thursday, 25 October 2012 at 17:59:40 UTC, Jesse Phillips wrote:
>>
>> It is a linker error. You need to compile the msgpack.d file and tell the linker where to find it. The simplest way is to just throw the file on the command line.
>>
>> dmd compare_json.d msgpack.d
>>
>
> Thanks. I tried your suggestion but had no luck (same link error). It could be my command is still wrong. Or maybe it is something related to associative arrays? The reason I suggest this is there is another example in the directory (custom.d) which uses functionality in msgpack and builds and runs fine without my specifying msgpack.d on the command line.
>
> Thanks
> Dan
>
> dmd  /.../msgpack-d/example/compare_json.d  /.../msgpack-d/src/msgpack.d
>
> compare_json.o: In function `_D7msgpack5Value83__T9toMsgpackTS7msgpack50__T6PackerTS3std5array16__T8AppenderTAhZ8AppenderZ6PackerZ9toMsgpackMxFNeKS7msgpack50__T6PackerTS3std5array16__T8AppenderTAhZ8AppenderZ6PackerZv':
> /.../msgpack-d/src/msgpack.d:(.text._D7msgpack5Value83__T9toMsgpackTS7msgpack50__T6PackerTS3std5array16__T8AppenderTAhZ8AppenderZ6PackerZ9toMsgpackMxFNeKS7msgpack50__T6PackerTS3std5array16__T8AppenderTAhZ8AppenderZ6PackerZv+0x1aa): undefined reference to `_D6object55__T16AssociativeArrayTS7msgpack5ValueTxS7msgpack5ValueZ16AssociativeArray6lengthMFNdZm'
> collect2: ld returned 1 exit status
> --- errorlevel 1