------- Comment #14 from hjl dot tools at gmail dot com 2008-12-11 15:41 ------- (In reply to comment #13) > Hi HJ: I'm not sure to understand, you mean this is actually a C++ / compiler > bug?!? >
I can't say if C++ standard requires const_T1_reference extract_key_imp(const_pair_reference r_val) { return r_val.first; } creates a temporary and returns a reference to it. On the other hand, I can't tell returning a reference to r_val.first directly will cause any harm. FWIW, icc 10.0 also creates a temporary and returns a reference to it. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37144