------- Comment #10 from phil at phord dot com 2008-06-03 16:26 ------- Gabriel's PDF can now be found here: http://www-sop.inria.fr/galaad/personnel/gdr/C++/talks/type-of-toupper.pdf
All the other links referenced in this comment section are dead. Quick fix from the PDF (in case it goes away again): Provide a manual cast for toupper to explicitly declare "which toupper" we mean. std::transform(&s[0], &s[0] + 5, &s[0], static_cast<int (*)(int)>(std::toupper)); (This solution is rejected in the PDF. Read the whole thing if you want to know why.) -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11108
