std::experimental::scope_exit 定义于头文件<experimental/scope> template<classEF> classscope_exit; (库基础 TS v3) 类模板scope_exit是通用的作用域防护,有意使它在退出作用域时调用其退出函数。 scope_exit非可复制构造(CopyConstructible)、可复制赋值(CopyAssignable)或可移动赋值(MoveAssignable),然而若EF满...
scope_exit 可为活跃,即在析构时调用其退出函数,或为不活跃,即在析构时不做任何事。在从退出函数构造后 scope_exit 为活跃。 scope_exit 能因手动或自动(由移动构造函数)在它上调用 release() 后变得不活跃。亦可由从另一不活跃的 scope_exit 初始化获得不活跃的 scope_exit 。一旦 scope_exit 不活跃,则...
std::experimental::scope_exit 在标头<experimental/scope>定义 template<classEF> classscope_exit; (库基础 TS v3) 类模板scope_exit是通用的作用域防护,有意使它在退出作用域时调用其退出函数。 scope_exit非可复制构造(CopyConstructible)、可复制赋值(CopyAssignable)或可移动赋值(MoveAssignable),然而若EF满足...
scope_exit(constscope_exit&)=delete; (3)(库基础 TS v3) 从函数、函数对象或另一scope_exit创建scope_exit。 1)以函数或函数对象初始化退出函数。构造的scope_exit为活跃。 若Fn不是左值引用类型且std::is_nothrow_constructible_v<EF, Fn>为true,则以std::forward<Fn>(fn),否则以fn初始化存储的EF。
构造拥有动态存储期的 scope_fail 可能导致不期待的行为。 从创建于另一线程的 scope_fail 构造scope_fail 亦可能导致不期待的行为,因为可能在析构期间比较从另一线程获得的未捕捉异常计数。 示例 本节未完成原因:暂无示例 参阅 scope_exit 包装函数对象并在退出作用域时调用 (类模板) scope_success 包装...
scope_success::release Deduction guides Defined in header <experimental/scope> template< class EF > class scope_success; (library fundamentals TS v3) The class template scope_success is a general-purpose scope guard intended to call its exit function when a scope is normally exited. scope_...
{autoguard=std::experimental::scope_exit{[&]{exit_status=true;}};maybe_throw();}catch(...){did_throw=true;}print_exit_status("scope_exit", exit_status, did_throw);// 使用 scope_fail:仅于发生异常时执行exit_status=did_throw=false;try{autoguard=std::experimental::scope_fail{[&]{exit...
If a function-local (block-scope) static object was destroyed and then that function is called from the destructor of another static object and the control flow passes through the definition of that object (or if it is used indirectly, via pointer or reference), the behavior is undefined. ...
std::cout<<"shared_ptr<> has been destructed due to scope exit.\n"; observe(weak); } 输出 提供弱指针的基于拥有者顺序 std::weak_ptr<T>::owner_before template<classY> bool owner_before( const weak_ptr<Y>&other) const noexcept; ...
std::string ScopeResolutionExpression::prettify(void) const { return std::format("(scope_resolution {} {})", group->prettify(), member.value); member.lexem); } ExpressionNode::TypeResult ScopeResolutionExpression::get_type(Analysis::Context &ctx) const { UNUSED(ctx); UNIMPLEMENTED("ScopeReso...