C++ compiler: 'class std::vector >' has no member named 'emplace_back'

Question

I'm getting error from the compiler when coding C++. Here is my code:

#include <iostream>     
#include <algorithm>   
#include <typeinfo>
#include <string>
#include <vector>


std::vector< std::vector<char> > p(std::vector<char> v)
{
    std::vector< std::vector<char> > result;

    std::sort(v.begin(), v.end());
    do
    {
        result.emplace_back(v);
    }
    while(std::next_permutation(v.begin(), v.end()));

    return result;
}

and here is my error:

enter image description here

Any idea what is causing this?

I'm using Codeblocks 12.11, Windows 7 and my compiler is GNU GCC Compiler

Thnx for the assist :)

UPDATE:

In case somebody bumps into the same problem, here is the solution (in Codeblocks 12.11):

Go to: Settings --> Compiler --> Compiler settings --> Check the following checkboxes:

enter image description here

In addition to that remember to have a main-function in your code. Otherwise the compiler will give the following error:

enter image description here

The solution was given by the users who answered my post :)

1. Does the GCC version (actually standard library version) support C++11? 2. If yes, are you passing the appropriate flag to GCC (something like `-std=c++11` or `-std=c++0x`)? — Angew is no longer proud of SO, Nov 05 '13 at 12:48
+1 I think it does not as @Jefffrey stated. How can I fix this in Codeblocks? — jjepsuomi, Nov 05 '13 at 12:49
I was not able to check both of the boxes, but the code seems to be working by checking one of the two. Can anyone explain? — LampPost, Jul 25 '17 at 20:27

score 20 · Accepted Answer · answered Nov 05 '13 at 12:48

20

Your compiler is not supporting C++11. The emplace_back member function of std::vector<T> has been added since C++11, as you can see.

Depending on your compiler version, you probably just need some flags to tell the compiler to turn on C++11 features. You can do that on GCC and Clang with:

-std=c++11 -stdlib=libc++

Otherwise you might need to update your compiler version to a more recent one.

answered Nov 05 '13 at 12:48

Shoe

74,840
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I had to use `-std=gnu++14` ([see also](https://stackoverflow.com/questions/10613126/what-are-the-differences-between-std-c11-and-std-gnu11)). Although I could only reproduce the issue with [rapidjson](https://github.com/Tencent/rapidjson). – Albert Oct 23 '18 at 21:43

C++ compiler: 'class std::vector >' has no member named 'emplace_back'

1 Answers1