Yeah it's not great unfortunately. It ends up being that I have two sides of this code--one side is this subset that I've wondered about writing analysers for a

Yeah it's not great unfortunately. It ends up being that I have two sides of this code--one side is this subset that I've wondered about writing analysers for and checking the syntax just for this custom "dialect" almost. The other side is the impls of the APIs that side uses. In general though I wonder how much the new 'concepts' stuff can help. But yeah this is the closest I've come to having a UI DSL in a language with deterministic resource management and access to direct byte data layout for your structures. The main other alternative seems to be Rust and IME I've had a harder time with its error messages but I think it's also bc. I happen to have experience with 'old' C++. If I was starting fresh it'd be different.