现代C++学习——从make-unique到pass-by-value-and-move 记录一次在cpp群里面的讨论过程。 首先是有人提出,没出C++11里面没有make-unique。Why does C++11 have `make_shared` but not `make_unique`。 答案忘记了。 然后就是老生常谈的,为什么需要make-unique,因为异常安全 。 之前的一些文章也有说过严格鸽:...
http://en.cppreference.com/w/cpp/memory/unique_ptr/make_unique Jan 20, 2015 at 7:39pm mutexe(2372) Balls. My mistake sorry. Jan 20, 2015 at 7:43pm closed account (SECMoG1T) oh yea it's a c++ 14 feature ,but what should i do next?
原文链接 https://github.com/isocpp/CppCoreGuidelines/blob/master/CppCoreGuidelines.md#r23-use-make_unique-to-make-unique_ptrs 觉得本文有帮助?请分享给更多人。 关注微信公众号【面向对象思考】轻松学习每一天! 面向对象开发,面向对象思考!
g++ -std=c++14 your_file.cpp 更新编译器 如果你的编译器版本较旧,可能需要更新到支持 C++14 的版本。 手动实现 make_unique 如果由于某些原因无法启用 C++14,你可以手动实现一个简单的 make_unique: 代码语言:txt 复制 #include <memory> template<typename T, typename... Args> std::unique_ptr<T> make...
/usr/bin/ld: ../builds/Debug-x86_64/engine/libengine.a(app.o): in function `std::_MakeUniq<Engine::Profiler>::__single_object std::make_unique<Engine::Profiler>()': /usr/include/c++/9/bits/unique_ptr.h:857: undefined reference to `Engine::Profiler::Profiler()'/usr/bin/ld: .....
API Reference Document std::make_unique, std::make_unique_default_initC++ Utilities library Dynamic memory management std::unique_ptr Defined in header <memory> template< class T, class... Args > unique_ptr<T> make_unique( Args&&... args ); (1) (since C++14)(only for non-array ...
undefined reference to `std::__cxx11::basic_string<char, 2019-11-13 09:41 −centos上编译报错,部分信息如下: /usr/local/lib/libprotobuf.so.9: undefined reference to `std::__cxx11::basic_string<char, std::char_traits<char>, std::a... ...
What I am trying to do is make a class group of SFML's drawables...this is the problem that I am facing thus far, because sf::Drawable is an abstract class...I have seen other person using reference_wrapper...but I don't want to use that technique as that makes my class share ...
1.shared_ptr允许有多个指针指向同一个对象,unique_ptr独占所指向的对象。 2.类似于vector,智能指针也是模板。创建智能指针: 使用make_shared函数分配一个对象并初始化它,make_shared函数返回一个指向此对象的shared_ptr: 3.我们可以认为每个share_ptr都有一个关联的计数器,通常称为引用计数(reference count)... ...
void PdfFieldChildrenCollectionBase::RemoveField(const PdfReference& ref) { initFields(); auto found = m_fieldMap->find(ref); if (found == m_fieldMap->end()) auto found = m_fieldMap.find(ref); if (found == m_fieldMap.end())...