Why am I getting this ifstream error?

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

I've even tried putting std::ifstream and it still doesn't work.

When I #include <fstream> instead of #include <iostream>, I get these errors in fstream.tcc and basic_ios.tcc:

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

And since that's part of the fstream library, obviously something i'm doing is wrong...

Anyone able to help?

You should have `` instead of `` The `operator=` is the real error. The output window should have the rest of that error message, including the line number where you make a copy of a `Mapper` object. — Mooing Duck, Jan 25 '12 at 20:08

Mika Fischer · Answer 1 · 2012-01-25T23:19:22.143

141

You're missing

#include <fstream>

and you probably assign somthing to inFile which is not allowed.

edited Jan 25 '12 at 23:19

answered Jan 25 '12 at 19:54

Mika Fischer

4,058
1
26
28

For some reason my question cut out the part where I already imported fstream – OghmaOsiris Jan 25 '12 at 19:56
You can edit it. And it would help to provide a minimal example that others can try to compile. – Mika Fischer Jan 25 '12 at 20:06
7

I think `ifstream` is included in `` until I took an arrow in my knee. – acgtyrant Jul 14 '15 at 09:05

Why am I getting this ifstream error?

1 Answers1

Linked