Archived
Marc Mutz
aee4f97f52
Qt is defaulting to QT_NO_FOREACH these days, so make sure we integrate nicely with downstream and fix the single Q_FOREACH/foreach user, in tst_encoder.cpp. Unfortunately, the container's initialization code doesn't exactly lend itself to making the container const (not even IILE (Immediately-Invoked Lambda Expression) would help here, due to the interdependency with `len`), so the idiomatic solution would be to use std::as_const()/qAsConst(). The former is available from C++17, which we don't require, yet, and the latter is not available under QT_NO_AS_CONST (the default for Qt these days), so grab the nettle and implement a t17::as_const() that switches between a manual implementation of std::as_const and the real thing, depending on __cpp_lib_as_const. The `t17` here mimicks the qNN (q20::remove_cvref_t/q23::forward_like/etc) mechanism used in Qt itself for backports, with s/q/t/ because ... _T_inyCbor. The t17 implementation is local to tst_encoder.cpp, but can easily be extracted into a separate header once more users emerge.