问题描述
我想添加一个打开的流作为类( Barcode )属性.目的是在我的 main()中实现多个条形码，每个条形码都可以写入特定文件.另外，我决定将所有条形码存储在一个向量中，该向量属于 Barcodes 类，尽管它可能没有用.
I would like to add an open ofstream as a class (Barcode) attribute. The goal is to implement several Barcodes in my main() that will each be able to write into a specific file. Also, I decided to stock all the barcodes in a vector, which belongs to a Barcodes class, although it is maybe not useful.
这是我的代码:
#include <iostream>
#include <fstream>
#include <string>
#include <vector>
#include <sys/stat.h>
using namespace std;
class Barcode {
public:
// Constructor
Barcode(string bcName, string bcSeq, string end, string const & fileName):
m_bcName(bcName), m_bcSeq(bcSeq), m_end(end), m_ofStream(fileName.c_str(), ios::app) {}
// Getters
string getBCName() const {
return m_bcName;
}
string getBCSeq() const {
return m_bcSeq;
}
//setter
void reportRead(string toReport) {
m_ofStream << toReport;
}
private:
string m_bcName;
string m_bcSeq;
string m_end;
ofstream m_ofStream;
};
class Barcodes {
public:
// Constructor
Barcodes(string barcodesFile, string end): m_barcodesFile(barcodesFile), m_end(end) {
initializeBarcodes();
}
// Getters
vector<Barcode> getBCs() {
return m_barcodes;
}
// Other
void initializeBarcodes() {
ifstream flow(m_barcodesFile);
if(!flow) {
cerr << "ERROR: Could'n find the \"barcode.txt\" file." << endl;
}
else {
string line, name, seq;
// parse each line of the barcode file
while(getline(flow, line)) {
//get the name and sequence of the barcodes
name = line.substr(0, 4);
seq = line.substr(5, 6);
//create the corresponding Barcode
string fileName = "Demultiplexed_Reads/" + name + "." + m_end + ".fastq";
Barcode bc(name, seq, m_end, fileName);
//add them in the corresponding vector
m_barcodes.push_back(bc);
}
}
}
private:
string m_barcodesFile;
string m_end;
vector<Barcode> m_barcodes;
};
int main(int argc, char* argv[]) {
//Create a new "Demultiplexed_Reads" folder
system("rm -rf Demultiplexed_Reads");
if(mkdir("Demultiplexed_Reads", 0755) != 0) {
cerr << "ERROR: Couldn't create the Demultiplexed folder." << endl;
return 1;
}
else {
// Get the files to demultiplex
string f1 = argv[1];
string f2 = argv[2];
// Generate the vectors of barcodes
Barcodes bcs1("barcodes.txt", "end1");
vector<Barcode> barcodes1(bcs1.getBCs());
Barcodes bcs2("barcodes.txt", "end2");
vector<Barcode> barcodes2(bcs2.getBCs());
// Demultiplex the reads of the end1
Demultiplexer dm1(f1, barcodes1, "end1");
dm1.demultiplex();
cout << "Reads of end1 demultiplexed" << endl;
// Demultiplex the reads of the end2
Demultiplexer dm2(f2, barcodes2, "end2");
dm2.demultiplex();
cout << "Reads of end2 demultiplexed" << endl;
return 0;
}
}
但是，当我尝试编译 g ++ --std = c ++ 11 myProg.cpp -o myProg 时，遇到了我不了解的有关已删除方法的错误:
However, I encounter errors that I don't understand about deleted methods when I am trying to compile g++ --std=c++11 myProg.cpp -o myProg:
In file included from /usr/include/x86_64-linux-gnu/c++/5/bits/c++allocator.h:33:0,
from /usr/include/c++/5/bits/allocator.h:46,
from /usr/include/c++/5/string:41,
from /usr/include/c++/5/bits/locale_classes.h:40,
from /usr/include/c++/5/bits/ios_base.h:41,
from /usr/include/c++/5/ios:42,
from /usr/include/c++/5/ostream:38,
from /usr/include/c++/5/iostream:39,
from Demultiplex.cpp:1:
/usr/include/c++/5/ext/new_allocator.h: In instantiation of ‘void __gnu_cxx::new_allocator<_Tp>::construct(_Up*, _Args&& ...) [with _Up = Barcode; _Args = {const Barcode&}; _Tp = Barcode]’:
/usr/include/c++/5/bits/alloc_traits.h:530:4: required from ‘static void std::allocator_traits<std::allocator<_CharT> >::construct(std::allocator_traits<std::allocator<_CharT> >::allocator_type&, _Up*, _Args&& ...) [with _Up = Barcode; _Args = {const Barcode&}; _Tp = Barcode; std::allocator_traits<std::allocator<_CharT> >::allocator_type = std::allocator<Barcode>]’
/usr/include/c++/5/bits/stl_vector.h:917:30: required from ‘void std::vector<_Tp, _Alloc>::push_back(const value_type&) [with _Tp = Barcode; _Alloc = std::allocator<Barcode>; std::vector<_Tp, _Alloc>::value_type = Barcode]’
Demultiplex.cpp:85:44: required from here
/usr/include/c++/5/ext/new_allocator.h:120:4: error: use of deleted function ‘Barcode::Barcode(const Barcode&)’
{ ::new((void *)__p) _Up(std::forward<_Args>(__args)...); }
^
Demultiplex.cpp:18:7: note: ‘Barcode::Barcode(const Barcode&)’ is implicitly deleted because the default definition would be ill-formed:
class Barcode {
^
Demultiplex.cpp:18:7: error: use of deleted function ‘std::basic_ofstream<_CharT, _Traits>::basic_ofstream(const std::basic_ofstream<_CharT, _Traits>&) [with _CharT = char; _Traits = std::char_traits<char>]’
In file included from Demultiplex.cpp:2:0:
/usr/include/c++/5/fstream:723:7: note: declared here
basic_ofstream(const basic_ofstream&) = delete;
^
In file included from /usr/include/c++/5/vector:62:0,
from Demultiplex.cpp:4:
/usr/include/c++/5/bits/stl_construct.h: In instantiation of ‘void std::_Construct(_T1*, _Args&& ...) [with _T1 = Barcode; _Args = {const Barcode&}]’:
/usr/include/c++/5/bits/stl_uninitialized.h:75:18: required from ‘static _ForwardIterator std::__uninitialized_copy<_TrivialValueTypes>::__uninit_copy(_InputIterator, _InputIterator, _ForwardIterator) [with _InputIterator = __gnu_cxx::__normal_iterator<const Barcode*, std::vector<Barcode> >; _ForwardIterator = Barcode*; bool _TrivialValueTypes = false]’
/usr/include/c++/5/bits/stl_uninitialized.h:126:15: required from ‘_ForwardIterator std::uninitialized_copy(_InputIterator, _InputIterator, _ForwardIterator) [with _InputIterator = __gnu_cxx::__normal_iterator<const Barcode*, std::vector<Barcode> >; _ForwardIterator = Barcode*]’
/usr/include/c++/5/bits/stl_uninitialized.h:281:37: required from ‘_ForwardIterator std::__uninitialized_copy_a(_InputIterator, _InputIterator, _ForwardIterator, std::allocator<_Tp>&) [with _InputIterator = __gnu_cxx::__normal_iterator<const Barcode*, std::vector<Barcode> >; _ForwardIterator = Barcode*; _Tp = Barcode]’
/usr/include/c++/5/bits/stl_vector.h:322:31: required from ‘std::vector<_Tp, _Alloc>::vector(const std::vector<_Tp, _Alloc>&) [with _Tp = Barcode; _Alloc = std::allocator<Barcode>]’
Demultiplex.cpp:63:20: required from here
/usr/include/c++/5/bits/stl_construct.h:75:7: error: use of deleted function ‘Barcode::Barcode(const Barcode&)’
{ ::new(static_cast<void*>(__p)) _T1(std::forward<_Args>(__args)...); }
有人知道是什么问题吗?
Does anybody know what the problem is ?
非常感谢您！
推荐答案
因此，我找到了一种解决问题的方法，所以我只写了我在这里使用的解决方案，以防对某人有用.
So I found a way to overcome my problem so I just write the solution I used here in case it would be useful for somebody.
最后，我在方法中创建了一个ofofstreams向量，该向量写入输出文件，而不是将流放入对象中.我是在读取ans的循环对输入文件中的行进行排序之前完成的.
Finally, I created a vector of ofstreams in the method that write into output files instead of putting the streams in the objects. I did it just before the loop that reads ans sorts lines from the input file.
正如您所说，诀窍是尝试复制流，因为这是不可能的.但是他们的参考可以移到向量中.因此，我使用了 move 函数，该函数自C ++ 11起就已经存在:
As you said, the trick is no to try to copy the stream since it is not possible. But their reference can be moved into the vector. So I used the move function, which is in the standard since C++11:
ofstream ofs(fileName);
ofStreams.push_back(move(ofs));
我为我工作，并允许我的程序比打开一个流并为需要排序的每一行关闭它要快得多.
I worked for me and allowed my program to be way faster than opening a stream and closing it for every line that I need to sort.
这篇关于打开ofstream作为类属性的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！