std::rotate return value in gcc 4.9

Question

Is it bug, that std::rotate function have void return value type in GCC 4.9 even if I specify -std=gnu++1y flag? As it pointed here there should be meaningfull (for some applications) return value.

Answer 1

• It looks like std::rotate in gcc doesn't conform to the C++11 standard (i.e., it's not implemented yet).
• I searched GCC Bugzilla and it seems that the bug is already reported since version 4.8.1 and currently being unassigned with status new.
• Thus, is a bug. Well spotted you should report it.