shierei
commented
6 years ago I am able to reproduce this by modifying simple.cpp a bit. The argument type of a function cannot be a pointer to std::string. For example, suppose I change the hasBigFeet function in ponder/test/examples/simple.cpp as follows.
bool hasBigFeet(std::string* dummy) const { return shoeSize > 10; }Then compiling simple.cpp would have the following error.
[ 91%] Building CXX object test/examples/CMakeFiles/egtest.dir/simple.cpp.o
In file included from include/ponder/classget.hpp:38:0,
from include/ponder/classbuilder.hpp:35,
from ponder/test/examples/simple.cpp:33:
include/ponder/detail/typeid.hpp: In instantiation of static const char* ponder::detail::StaticTypeId<T>::get(bool) [with T = std::basic_string<char>] :
include/ponder/class.inl:56:60: required from static ponder::ClassBuilder<T> ponder::Class::declare(ponder::IdRef) [with T = std::basic_string<char>; ponder::IdRef = ponder::detail::basic_string_view<char>]
ponder/test/examples/simple.cpp:67:47: required from here
include/ponder/detail/typeid.hpp:52:46: error: PONDER_TYPE_NOT_REGISTERED is not a member of std::basic_string<char>
return T::PONDER_TYPE_NOT_REGISTERED();
^
make[2]: *** [test/examples/CMakeFiles/egtest.dir/simple.cpp.o] Error 1
make[1]: *** [test/examples/CMakeFiles/egtest.dir/all] Error 2
make: *** [all] Error 2This compilation error can be avoid by declaring PONDER_TYPE(std::string).
However running egtest with this code would throw the classNotFound exception on class type std::string.
$ egtest
------------------------------------------------------------
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
egtest is a Catch v2.2.2 host application.
Run with -? for options
-------------------------------------------------------------------------------
simple tests
intro
-------------------------------------------------------------------------------
ponder/test/examples/simple.cpp:117
...............................................................................
/scratch/backup/ponder/test/examples/simple.cpp:117: FAILED:
**due to unexpected exception with message:
the metaclass std::string couldn't be found**
Class Vec2D: 2D vector
add: add vector to this and return result
===============================================================================
test cases: 3 | 2 passed | 1 failed
assertions: 1 | 1 failedNot that this is the only way to do pass by reference for a string. As reported in a one of the previous issues, using string& would not work because it acts like pass by value in both CAMP and PONDER.
I am trying to port a project which used CAMP to PONDER. Because of this, I am basically stuck.
billyquith
My code tries to declare a class which has a std::string property.
The code compiled but it threw classNotFound exception on classByType() at runtime for some reason.
Does anyone know what was going on here? The call was called by ponder implicitly. I added the following line in the example program simple.cpp and it threw the same runtime exception.
simple.cpp's Person class also has a std::string property but it runs fine. What have I missed?
Thanks,