[Bug c++/62222] New: 'tuple_element_t' was not declared in this scope

[tower120 at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62222

            Bug ID: 62222
           Summary: 'tuple_element_t' was not declared in this scope
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: tower120 at gmail dot com

In the following code (http://coliru.stacked-crooked.com/a/f78031af320b07f0)

#include <iostream>
#include <tuple>
#include <stdlib.h> 
#include <array>

using namespace std;

int main(){

    using T  = tuple<int, float, char>;
    using el = tuple_element_t<0, T>;
}


main.cpp: In function 'int main()':
main.cpp:12:16: error: 'tuple_element_t' does not name a type
     using el = tuple_element_t<0, T>
                ^
Compiled with gcc 4.9 MinGW Windows.
g++ -std=c++1y  -O3 -Winline -Wextra -pthread -pedantic-errors main.cpp -lm  &&
./a.out