Re: [Discuss-gnuradio] Correct usage of gr::io_signature::makev

[Marcus Müller]

Hi Sumit, 

I don't see where `ios` is being declared constantly and/or statically
before line 31? Does that happen in the header?

Best regards,
Marcus
On Sat, 2018-04-28 at 16:51 +0200, Sumit Kumar wrote:
> Hi, 
> In order to look for correct usage of gr::io_signature::makev, I
> checked this example https://github.com/gnuradio/gnuradio/blob/master
> /gr-digital/lib/fll_band_edge_cc_impl.cc
> and found 
> static int ios[] = {sizeof(gr_complex), sizeof(gr_complex),
> sizeof(gr_complex), sizeof(float)}; 
> static std::vector<int> iosig(ios, ios+sizeof(ios)/sizeof(int));
> and then use as io_signature::makev(1, 4, iosig))
> Basically I have to use it in sync_short.cc from gr-ieee 80211 in
> order to create more inputs. 
> But if I use the above two lines inside the class i.e.
> sync_short_impl, I get lots of error. I have attached the file for
> reference. Could you please suggest me correct usage. I can give more
> information if needed. 
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> ~~~~~~~
> /home/john/myprefix/src/gr-ieee-80211/lib/sync_short.cc:31:84: error:
> in-class initialization of static data member ‘int
> sync_short_impl::ios []’ of incomplete type
>  tic int ios[] = {sizeof(gr_complex), sizeof(float), sizeof(float),
> sizeof(float)};
>                                                                      
>             ^
> /home/john/myprefix/src/gr-ieee-80211/lib/sync_short.cc:32:31: error:
> ‘ios’ is not a type
>  static std::vector<int> iosig(ios, ios+sizeof(ios)/sizeof(int));
>                                ^
> /home/john/myprefix/src/gr-ieee-80211/lib/sync_short.cc:32:36: error:
> ‘ios’ is not a type
>  static std::vector<int> iosig(ios, ios+sizeof(ios)/sizeof(int));
>                                     ^
> /home/john/myprefix/src/gr-ieee-80211/lib/sync_short.cc:32:39: error:
> expected ‘,’ or ‘...’ before ‘+’ token
>  static std::vector<int> iosig(ios, ios+sizeof(ios)/sizeof(int));
>                                        ^
> /home/john/myprefix/src/gr-ieee-80211/lib/sync_short.cc: In
> constructor ‘sync_short_impl::sync_short_impl(double, unsigned int,
> bool, bool)’:
> /home/john/myprefix/src/gr-ieee-80211/lib/sync_short.cc:35:39: error:
> no matching function for call to ‘gr::io_signature::makev(int, int,
> std::vector<int> (&)(int, int))’
>     gr::io_signature::makev(4, 4, iosig),
>                                        ^
> In file included from
> /home/john/myprefix/include/gnuradio/basic_block.h:30:0,
>                  from
> /home/john/myprefix/include/gnuradio/block.h:27,
>                  from /home/john/myprefix/src/gr-ieee-
> 80211/include/ieee802-11/sync_short.h:21,
>                  from /home/john/myprefix/src/gr-ieee-
> 80211/lib/sync_short.cc:17:
> /home/john/myprefix/include/gnuradio/io_signature.h:100:17: note:
> candidate: static gr::io_signature::sptr gr::io_signature::makev(int,
> int, const std::vector<int>&)
>      static sptr makev(int min_streams, int max_streams,
>                  ^
> /home/john/myprefix/include/gnuradio/io_signature.h:100:17: note:  
> no known conversion for argument 3 from ‘std::vector<int>(int, int)’
> to ‘const std::vector<int>&’
> lib/CMakeFiles/gnuradio-ieee802_11.dir/build.make:584: recipe for
> target 'lib/CMakeFiles/gnuradio-ieee802_11.dir/sync_short.cc.o'
> failed
> make[2]: *** [lib/CMakeFiles/gnuradio-ieee802_11.dir/sync_short.cc.o] 
> Error 1
> CMakeFiles/Makefile2:200: recipe for target 'lib/CMakeFiles/gnuradio-
> ieee802_11.dir/all' failed
> make[1]: *** [lib/CMakeFiles/gnuradio-ieee802_11.dir/all] Error 2
> Makefile:138: recipe for target 'all' failed
> make: *** [all] Error 2
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