I tried coming up with a decent Result type and Try macro in C++ and got nowhere. To be usable I need something like this:
auto varname = Try(expression);
Where the Try expression will either return the error type immediately or evaluate to the success type.
As far as I can tell there’s no portable way to implement that macro in C++20, and nothing coming down the pipe either. I don’t think chaining lambdas is good enough. It can make the code uglier than just manually checking returns.
I’ll be happy if anyone can correct me though. The best I managed was still pretty gross:
TryBind(varname, expression);
Works, but it just looks like a bad DSL at that point.
I tried coming up with a decent
Resulttype and Try macro in C++ and got nowhere. To be usable I need something like this:auto varname = Try(expression);Where the Try expression will either return the error type immediately or evaluate to the success type.
As far as I can tell there’s no portable way to implement that macro in C++20, and nothing coming down the pipe either. I don’t think chaining lambdas is good enough. It can make the code uglier than just manually checking returns.
I’ll be happy if anyone can correct me though. The best I managed was still pretty gross:
TryBind(varname, expression);Works, but it just looks like a bad DSL at that point.
BOOST_OUTCOME_TRYXmay be what you’re looking for. It’s only available on gcc and clang though.Yeah, I came across that. I presume it just uses the GCC statement expressions extension under the hood.
No can do though, it has to work with MSVC too.