Simple PIXMTA example issue

[sherrick01821]

#include
#include <nitf/TRE.hpp>

int main()
{

nitf::TRE tre( "PIXMTA" , "PIXMTA" );

tre.setField("NUMAIS", 1);

#if 1
nitf::TREFieldIterator it = tre.begin();

while( it != tre.end() )
{
nitf::Pair pr = *it;

// std::cout << pr.first() << "\n";
++it;
}
#endif

tre.setField("AISDLVL[0]", 1);
tre.setField("SCALE_X", "1.2");

}

When I compile and run the above example. It runs without error. However If I change the #if 1 to #if 0 an exception is thrown due to AISDLVL[0]. Why is that? Its a valid field

[sherrick01821]

As an added info. The valid fields printed when using the std::cout when iterating over the TRE

NUMAIS
AISDLVL[0]
ORIGIN_X
ORIGIN_Y
SCALE_X
SCALE_Y
SAMPLE_MODE
NUMMETRICS
PERBAND
RESERVED_LEN

[bradh]

I don't see the exception.

#include <nitf/TRE.hpp>

int main()
{
    nitf::TRE tre("PIXMTA", "PIXMTA");
    tre.setField("NUMAIS", 1);
    tre.setField("AISDLVL[0]", 1);
    tre.setField("SCALE_X", "1.2");
}

(which is essentially your code with the #ifdef'd part removed)

compiles and runs.

[sherrick01821]

That is odd. After running cmake and then building the library with make and installing in /opt there was an empty /opt/include/std directory. Trying to compile this testpixmta.cpp example it complained about the nonexistence of <std/bit> I then created a subdirectory ubder /opt/include called nitrostd and copied the files in externals/coda-oss/modules/c++/std/include/std to this directory and then the code compiled fine. There appears to be files in std created to satisfy C++ 11 compilers for C++ 17 like bit, cstddef, filesystem etc...
I also had to ignore the compiler warnings it complained about like in ImageSubheader.cpp

mutable nitf_Error error{};

where the compiler complained about no initializer.

What OS and compiler are you running?

[bradh]

I just did it in tree (as a unittest) and did a rebuild. I had to set the plugin path (environment variable), but that was all.
If you have problems with out of tree, maybe worth checking if the existing apps / tests work in the same environment.

Nothing special about the machine - Ubuntu 20.10 (aka "Groovy"), g++ 10.3.0.