Why this doesn't work? qDebug() << "Test" << std::endl;

**grayfox** · 31st May 2011, 16:35

error: C2228: left of '.nospace' must have class/struct/union

**high_flyer** · 31st May 2011, 16:47

why do you think this should work in the first place?

**lsvichet** · 31st May 2011, 19:23

just write

qDebug()<<"Test";

don't forget to include: #include <QDebug>

**dbzhang800** · 1st June 2011, 02:58

Originally Posted by grayfox

error: C2228: left of '.nospace' must have class/struct/union

You should know that: std::endl is just a template function

declaration:

Qt Code:

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template <class charT, class traits>
  basic_ostream<charT,traits>& endl ( basic_ostream<charT,traits>& os );

template <class charT, class traits>
  basic_ostream<charT,traits>& endl ( basic_ostream<charT,traits>& os );

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and following code is equal:

Qt Code:

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std::cout<<"hello"<<std::endl;
    std::endl(std::cout<<"hello");

std::cout<<"hello"<<std::endl;
    std::endl(std::cout<<"hello");

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**MarekR22** · 1st June 2011, 10:19

std::endl is not supported by qDebug() (QDebug). This is not a STL stream!
Every qDebug() << somthig << something; creates log in separate line.

Thread: Why this doesn't work? qDebug() << "Test" << std::endl;