On Sat, Oct 20, 2018 at 1:44 PM Elvis Stansvik <elvst...@gmail.com> wrote: > > Hi all (first post),
Welcome :) > In Qt 5.7+ there's qAsConst, an std::as_const implementation for those > who are not on C++17 yet, which is convenient for iterating over Qt > containers using range-based for loops without causing a detach. > > For good reasons there's no version of qAsConst that takes an rvalue > reference, so you can't do e.g. for (auto foo : > qAsConst(returnsQtContainer()) { ... }. Instead you must do const > auto stuff = returnsQtContainer(); for (auto foo : stuff) { ... }. Should we instead just encourage people to make returnsQtContainer() return a const container ? Not sure what's the reason we don't do it in Qt. It's frowned upon for regular value types, but our containers are special. Regards, Sergio _______________________________________________ Development mailing list Development@qt-project.org http://lists.qt-project.org/mailman/listinfo/development