我的构造函数中有以下代码块(这只是一个示例,问题不是关于拆分,而是抛出一个通用异常.另外,不能使用Boost库.
Transfer::Transfer(const string &dest){
try{
struct stat st;
char * token;
std::string path(PATH_SEPARATOR) // if it is \ or / this macro will solve it
token = strtok((char*)dest.c_str(),PATH_SEPARATOR) //
while(token != NULL){
path += token;
if(stat(path.c_str(),&st) != 0){
if(mkdir(path.c_str()) != 0){
std:string msg("Error creating the directory\n");
throw exception // here is where this question lies
}
}
token = strtok(NULL,PATH_SEPARATOR);
path += PATH_SEPARATOR;
}
}catch(std::exception &e){
//catch an exception which kills the program
// the program shall not continue working.
}
}
我想要的是如果目录不存在而无法创建,则抛出异常.我想抛出一个通用异常,我怎么能用C做呢？
PS：dest具有以下格式：
dest = /usr/var/temp/current/tree
解决方法
请检查
this answer.这解释了如何使用您自己的异常类
class myException: public std::runtime_error
{
public:
myException(std::string const& msg):
std::runtime_error(msg)
{}
};
void Transfer(){
try{
throw myException("Error creating the directory\n");
}catch(std::exception &e){
cout << "Exception " << e.what() << endl;
//catch an exception which kills the program
// the program shall not continue working.
}
}
此外,如果您不想要自己的课程,您可以简单地执行此操作
throw std::runtime_error("Error creating the directory\n");
