fork(1) download
copy 
  1. template <class T> class A;
  2. template <class T, class U>
  3. void operator*(A<T>, A<U>);
  4.  
  5. template <class T>
  6. class A {
  7.     friend void ::operator*<>(A<T>, A<T>);
  8.     void friends_only();
  9. };
  10.  
  11. template <class T, class U>
  12. void operator*(A<T> a, A<U>) {
  13.   a.friends_only();
  14. }
  15.  
  16. int m()
  17. {
  18.     A<int> a;
  19.     A<void> b;
  20.     a*a;
  21. }
Compilation error #stdin compilation error #stdout 0s 0KB
comments (?)
stdin
copy 
Standard input is empty
compilation info 
/usr/lib/gcc/i686-pc-linux-gnu/4.5.1/../../../crt1.o: In function `_start':
(.text+0x18): undefined reference to `main'
/home/4bZ4aY/ccWW6un1.o: In function `m()':
prog.cpp:(.text+0xf): undefined reference to `A<int>::friends_only()'
collect2: ld returned 1 exit status
stdout
copy 
Standard output is empty
https://ideone.com/eDUOIs
language:
C++14 (gcc 8.3)
created:
11 years ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!