I'm trying to get "CMtoaPlugin::listArnoldNodes()" to return an "array" of strings
std::vector<std::string> ArnoldNodes = CMtoaPlugin::listArnoldNodes();
std::vector<std::string>::iterator it;
for ( it=ArnoldNodes.begin() ; it < ArnoldNodes.end(); it++ )
{
printf("initialize shader %s\n", *it);
}
but this is what i get, 2 entries, that's correct but the content of the entry is not
initialize Arnold shader †¡/
initialize Arnold shader.
what am i doing wrong
You can not print a std::string with printf (or any varargs method). g++ gives a warning here:
warning: cannot pass objects of non-POD type ‘struct std::string’ through ‘...’; call will abort at runtime
Just use cout:
std::cout << "initialize shader " << *it << std::endl;
Another possibility is to print the C-string corresponding to std::string with printf, like this:
printf("initialize shader %s\n", it->c_str());
Try it like this:
for (it = ArnoldNodes.begin() ; it != ArnoldNodes.end(); ++it)
{
std::cout << "initialize shader " << *it << std::endl;
}
printf doesn't work with std::string, you need to use cout (or pass it it->c_str())it != vec.end() (since you only need to check for equality, not compare), and ++it to increment (post-increment can be less efficient for some iterators).When you for-loop across your iterator range, you should be performing it using :
for ( it = ArnoldNodes.begin() ; it != ArnoldNodes.end(); it++ )
{ /*...*/ }
the difference is that the comparison is != instead of <, because container.end() iterators return one-past-the-end of the container. It's not necessarily more "correct", but it is more idiomatic.
container.end() is past-the-end, but because loops written with < only work for RandomAccessIterators, whereas != works for all of them.