为什么我收到ifstream错误？

Question

Implicit instantiation of undefined template 'std::basic_ifstream<char,std::char_traits<char>>'

---

#ifndef MAPPER_H
#define MAPPER_H
#include <iostream>
#include <string>
#include <vector>
#include "KeyValue.h"
#include "Parser.h"

using namespace std;
class Mapper
{
public:
    Mapper(ifstream& infile);
    ~Mapper(void);
    void loadTokens();
    void showTokens();
    void map();
    void printMap();
    void printMap(string map_fileName);
private:
    ifstream inFile;  //<-- is where the error is happening
    vector<string> tokens;
    vector<KeyValue> map_output;
    Parser* parser;
};

#endif

我甚至尝试过推杆std::ifstream但它仍然无效.

当我#include <fstream>代替的#include <iostream>,我在得到这些错误fstream.tcc和basic_ios.tcc:

'operator=' is a private member of 'std::basic_streambuf<char>'

由于这是fstream库的一部分,显然我正在做的事情是错误的......

有人能帮忙吗？

Answer 1

你错过了

#include <fstream>

你可能会分配一些inFile不允许的东西.