←back to thread

Reflection for C++26

(isocpp.org)
196 points svlasov | 1 comments | 30 Jun 24 11:26 UTC | HN request time: 0.309s | source
Show context
kstrauser ◴[01 Jul 24 23:50 UTC] No.40852102[source]▶
I haven't touched C++ since undergrad. Neither have I written any Qt code. But from memory, doesn't Qt's moc implement some of this stuff because it wasn't available in C++? Could this replace moc?
replies(4): >>40852283 #>>40852302 #>>40852535 #>>40854005 #
1. jacoblambda ◴[02 Jul 24 00:56 UTC] No.40852535[source]▶
Qt's moc can already be replaced and it increasingly is being relied on less and less as time goes on but dropping moc requires dropping all lower C++ standards or maintaining separate moc and modern-c++ versions.

And while it can currently be replaced with templates alone in fairly old versions of C++ (C++14 is the oldest I think), compile times are egregious unless you use very new, shiny features.

And as much as I am pro "move to new shiny C++", one of the big commercial uses of Qt is in semi-embedded applications like car entertainment centers where you are stuck with whatever (often outdated) toolchain your SOC source relies on. So pushing for shiny new Qt risks either splitting Qt in half or abandoning a lot of very well paying users.