Mixing statements and contexts

[Checkmate50]

The mix of statement and context here (read ; mixed with {) feels a bit awkward:

let context1 = (&context).set_a_position(...);
  {

I wonder if there's a good way to get rid of the semicolon at the end of let context1 = (&context).set_a_position(...); to make it more clear that we're opening a scope wrt the previous context and not just "context-free", if that makes sense. It's a minor syntactic point, but I think it's important actually

[Pat-Lafon]

For syntax changes, there would need to be a macro involved. I'm not sure what would the most rust-like solution. Either there is one large macro that wraps all of the contexts and does the ; removal. Or each set_*** becomes a macro. It might be a bit weird since rust doesn't(yet) support context.set_***! macros. It would probably be something like

set_***!{context1 = context <- ...;
    set_***!{context2 = context1 <- ...;
        run(graphic_run(...))
    }
}