what()<<endl; // 打印异常信息 } return 0; } #2.2 异常类型 异常类型 描述 std::exception 所有的异常 std::bad_alloc new异常 std::bad_cast dynamic_cast异常 std::bad_exception 无法预期的异常 std::bad_typeid typeid异常 std::logic_error 读取代码来检测到的异常 std::domain_error 使用了一个...
cout<<"Exception type:"<<typeid(e).name()<<endl; } 使用new进行分配空间,无法得到满足,于是自动抛出异常。 try{ fs.open("test.txt");if(fs.fail()){ cout<<"open failed"<<endl; } cout<<"end of try_block"<<endl; }catch(exception &e) { cout<<"Exception:"<<e.what()<<endl; cout...
std::exception是所以异常类的父类,派生的子类有std::bad_alloc,std::bad_cast, std::bad_typeid, std::bad_exception, std::logic_error, std::runtime_error,其中std::runtime_error又派生出std::overflow_error, std::range_error, std::underflow_error。 异常类提供了what()方法,返回异常产生的原因。
std::exception:: 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...
如果两个对象lhs和rhs都具有动态类型T,并且lhs是rhs的副本,那么std::strcmp(lhs.what(), rhs.what())等于0。 每个这种类T的成员函数what()都满足std::exception::what()所受到的制约。 标准异常 logic_error ios_base::failure (C++11 前) ...
svr.set_exception_handler([](const auto& req, auto& res, std::exception_ptr ep) { auto fmt = "Error 500%s"; char buf[BUFSIZ]; try { std::rethrow_exception(ep); } catch (std::exception &e) { snprintf(buf, sizeof(buf), fmt, e.what()); } catch (...) { // See the fol...
} catch (const std::exception& e) { std::cerr << e.what() << "\n"; } } } 模块 C++20模块是一种新的代码组织和重用的方式,它可以替代传统的头文件和翻译单元。#include 多个头文件时编译很慢,使用 module 相当于直接调用编译好的二进制文件,这个二进制文件中描述...
Exception types−Error numbers basic_stacktrace(C++23) Debugging support(C++26) Memory management library Allocators−Smart pointers Memory resources(C++17) Metaprogramming library(C++11) Type traits−ratio integer_sequence(C++14) General utilities library ...
" << post_param << ""; } }; int main(int argc,char ** argv){ try { cppcms::service srv(argc,argv); srv.applications_pool().mount(cppcms::applications_factory<myapp>()); srv.run(); } catch (std::exception const &e) { std::cerr << e.what() << std::endl; } return ...
terminate called after throwing an instance of 'cv::Exception' what(): OpenCV(4.5.4) ./modules/dnn/src/onnx/onnx_importer.cpp:739: error: (-2:Unspecified error) in function 'handleNode' Issue submission checklist I have updated my opencv version to 4.7.0 but it still has this problem...