https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81000
Bug ID: 81000 Summary: std::any improvement Product: gcc Version: 5.1.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: libstdc++ Assignee: unassigned at gcc dot gnu.org Reporter: nicolas_daniengels at yahoo dot com.br Target Milestone: --- The code: #if __has_include(<any>) # include <any> using namespace std; #elif __has_include(<experimental/any>) # include <experimental/any> using namespace std::experimental; #endif int f() { any a = 0.7777; a = 10; return any_cast<int>(a); } Is not optimised away (-O[1, 2, 3]) since was add in back 5.1. Could it be improved for this trivial case? Comparative: https://godbolt.org/g/sfDj0C Thanks to all contributors of libstdc++! Nicolas Engels