error c2664: cannot convert arg 1 from IFD* to const IFD&

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I'm new to shared_ptr's and I'm trying to figure out the build error:

C++

error C2664: 'IFD::IFD(const IFD &)' : cannot convert argument 1 from 'IFD *' to 'const IFD &'

It's strange that it's not working because I copied a code section from a similar area that was building.

The affected code looks like this in IFJ.cpp:

XML

void IFJ::addElementVectorIFD(shared_ptr<IFD> rspIFD)
{
    m_spVectorIFD.push_back(std::make_shared<IFD>(rspIFDocument.get())); //add item to vector
}

(there's got to be a way to copy/paste into CodeProject without it inserting '"<"' and such...it's not easy to look at)

in IFJ.h:

C++

public:
void addElementVectorIFD(shared_ptr<IFD> rspIFD);
private:
 vector<shared_ptr<IFD>>  m_spVectorIFD;

I found this link http://stackoverflow.com/questions/22390854/error-c2664-cannot-convert-argument-from-nodeint-to-int[^] but it's a little different so I'm not sure if I have the same issue.

Posted 19-Jan-15 2:26am

MichCl

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MichCl 19-Jan-15 9:13am

I tried this too
m_spVectorIFD.push_back(std::shared_ptr<ifd>(new IFD(rspIFD.get()))); //add item to vector and get the same error message as above:

error C2664: 'IFD::IFD(const IFD &)' : cannot convert argument 1 from 'IFD *' to 'const IFD &'

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MichCl · Answer 1 · 2015-01-19T07:52:00

Solution 2

I wound up just doing this:

m_spVectorIFDocument.push_back(rspIFDocument);

After I looked at this link: http://stackoverflow.com/questions/6081556/c-stdvectorstdshared-ptr[^]

Posted 19-Jan-15 7:52am

MichCl

KarstenK · Answer 2 · 2015-01-19T02:41:00

Solution 1

it is the same issue: type mismatch. You construct a temporary pointer, but need a ref type.

Often is the error message correct. Really often... ;-)

Posted 19-Jan-15 2:41am

KarstenK

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MichCl 19-Jan-15 8:57am

Sorry @KarstenK, I'm trying to put a shared pointer into a vector of shared pointers. Why does it think it needs a ref?

MichCl 19-Jan-15 9:07am

I tried this too and it didn't work either: m_spVectorIFD.push_back(rspIFD.get()); //add item to vector

error for that says: "error C2664: 'void std::vector<std::shared_ptr<ifd>,std::allocator<_Ty>>::push_back(const std::shared_ptr<ifd> &)' : cannot convert argument 1 from 'IFD *' to 'std::shared_ptr<ifd> &&'
"

error c2664: cannot convert arg 1 from IFD* to const IFD&

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error c2664: cannot convert arg 1 from IFD* to const IFD&

2 solutions

Solution 2

Solution 1

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