C++11 C++ primer 5th

最新推荐文章于 2025-05-05 14:12:43 发布

xx77009833

最新推荐文章于 2025-05-05 14:12:43 发布

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分类专栏： C++11 文章标签： c++

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1. why null ptr

std::vector<Foo*> foos;
// ...
std::fill(foos.begin(), foos.end(), 0);

will compile error

in C++03 we can use

std::fill (foos.begin(), foos.edn(), static_cast<int *>(0));

this is why nullptr accepted.

2. extern template

3. initialization lists & uniform initialization

http://kalnitsky.org/2011/09/04/introduction-to-cpp11-part-2/en/

4. auto

http://kalnitsky.org/2011/08/28/introduction-to-cpp11-part-1/en/

With brining auto into service the code readability increases considerably!You no longer have to write long and complicated template types. E.g. to getiterator:

// c++03
for (std::vector<std::map<int, std::string>>::const_iterator it = container.begin();
     it != container.end();
     ++it)
{
    // do something
}

// c++11
for (auto it = container.begin(); it != container.end(); ++it)
{
    // do something
}

actually decltype might be used to get the result offunctions, functors etc.