若一个函数或函数对象(包括无尾随返回类型的 lambda 表达式)返回纯右值,用这样的对象初始化返回值为引用的std::function,则程序非良构,因为禁止将返回的引用绑定到临时对象。 (C++23 起) std::function<constint&()>F([]{return42;});// C++23 起错误:不能绑定返回的引用到临时对象intx=F();// C++23 ...
compares astd::functionwithnullptr (function template) Helper classes std::uses_allocator<std::function> (C++11)(until C++17) specializes thestd::uses_allocatortype trait (class template specialization) Deduction guides(since C++17) Notes Care should be taken when astd::function, whose result type...
std::function 的分配器支持说明贫乏,且实现不一致。一些实现完全不提供重载 (6-10),一些提供重载但忽略提供的分配器参数,而一些实现提供重载并将提供的分配器用于构造,但不在重赋值 std::function 时使用。结果,C++17 中移除了分配器支持。 示例运行此代码 #include <functional> #include <iostream> #include ...
function() noexcept; (1) (since C++11) function( std::nullptr_t ) noexcept; (2) (since C++11) function( const function& other ); (3) (since C++11) (4) function( function&& other ); (since C++11) (until C++20) function( function&& other ) noexcept; (since C++20) ...
为什么cppreference上说std::printf是表达式?可以把函数名称理解为一种常量，其中记录着函数的地址。普通的...
std::swap(std::vector) specializes thestd::swapalgorithm (function template) erase(std::vector)erase_if(std::vector) (C++20) erases all elements satisfying specific criteria (function template) Deduction guides (since C++17) Notes Feature-testmacroValueStdFeature ...
a cast expression to rvalue reference to function type, such as static_cast<void (&&)(int)>(x). (C++ 11 右值强转函数类型) Properties: Same as glvalue (below). Address of an lvalue may be taken: &++i[1] and &std::endl are valid expressions. ...
InitializeFailFast function Calls MddBootstrapInitialize to initialize the calling process to use the specified version of the Windows App SDK's framework package. If the call fails, aborts the process (via std::abort)...
InitializeFailFast function Calls MddBootstrapInitialize to initialize the calling process to use the specified version of the Windows App SDK's framework package. If the call fails, aborts the process (via std::abort)...
InitializeFailFast function Calls MddBootstrapInitialize to initialize the calling process to use the specified version of the Windows App SDK's framework package. If the call fails, aborts the process (via std::abort)...