标准库所生成的所有异常都继承自std::exception。 std::exception的所有成员函数均为constexpr。 (C++26 起) 成员函数 (构造函数) 构造异常对象 (公开成员函数) (析构函数) [虚] 销毁该异常对象 (虚公开成员函数) operator= 复制异常对象 (公开成员函数) ...
因为不允许 std::exception 的复制操作抛出异常,所以当派生类(例如 std::runtime_error)必须管理用户定义的诊断信息时,常将它实现为写时复制的字符串。 微软的实现包含了非标准的接收字符串的构造函数,因此可以允许直接抛出带有有意义的错误信息的实例。标准库中有最接近的等价行为的是 std::runtime_error 和std...
Two instances of std::exception_ptr compare equal only if they are both null or both point at the same exception object. std::exception_ptr is not implicitly convertible to any arithmetic, enumeration, or pointer type. It is convertible to bool, and will evaluate to false if it is null,...
std::exception::what From cppreference.com <cpp |error |exception C++ Returns the explanatory string. Parameters (none) Return value Pointer to a null-terminated string with explanatory information. The pointer is guaranteed to be valid at least until the exception object from which it is...
From cppreference.com <cpp |error Defined in header<exception> classnested_exception; (since C++11) std::nested_exceptionis a polymorphic mixin class which can capture and store the current exception, making it possible to nest exceptions of arbitrary types within each other. ...
Chase through to[nullablepointer.requirements], which spells out the various operations that must be supported.It says, for example, that the object must satisfyCpp17CopyConstructible(orCopyConstructible, as cppreference.com calls it), but if you follow that definition, there is still no mention ...
http://www.cplusplus.com/reference/ios/ios/exceptions/ https://en.cppreference.com/w/cpp/error/nested_exception https://qa.1r1g.com/sf/ask/2605911031/ https://stackoverflow.com/questions/8397200/how-to-use-stdnested-exception-and-friends...
针对你遇到的“undefined reference to std::__exception_ptr::exception_ptr::_m_release()@cxx”错误,这通常是由于链接器无法找到标准库中的相关函数定义。以下是一些可能的解决方案和建议: 检查编译器和链接器的标准库设置: 确保你的编译器和链接器使用的是同一套标准库。如果你使用的是GCC或Clang编译器,通常...
std::exception_ptr是一个类可空指针的类型,管理已抛出并为std::current_exception所捕捉的异常对象。std::exception_ptr的实例可传递给另一函数,可以在另一线程,在那里异常可能重抛并为 catch 子句所处理。 默认构造的std::exception_ptr是空指针;它不指向异常对象。
从parallel_for 的注释中知道在并行区域中只能使用data pointer,其异常处理通过std::exception_ptr实现。 # https://github.com/pytorch/pytorch/blob/master/aten/src/ATen/ParallelOpenMP.h template <typename F> inline void invoke_parallel( int64_t begin, ...