On Wed, Nov 7, 2018 at 9:17 AM Mark Thom <markjordant...@gmail.com> wrote:
> I know that pf is a linear resource, and it needs to be consumed somehow.. > how do I make it happen? > If I don't touch v after the call to ptr_set0 (ie. if I remove the final > println!), the program will compile.. which also makes > no sense given what I think I know about linear resources in ATS. The line that assigns the view@ to 'pf' is borrowing the view and assigning it to 'pf'. It needs to be "given back", which both consumes the proof (the 'pf') and restores the 'view@': var v: int = 5 prval pf = view@(v) val _ = ptr_set0(pf | addr@(v), 3) prval () = view@(v) := pf This idiom was used a lot in ATS1 and I think ATS2 made it so in some cases it wasn't needed. After changing this I hit an issue with overloading in println: the symbol [print] cannot be resolved due to too many matches: D2ITMcst(print_option) of 0 D2ITMcst(print_list_vt) of 0 This seems to be something to do with the type that ATS has assigned to 'v' being changed after the proof usage. I cheated by using 'cast2int(v)' from unsafe.sats to get it to compile but hopefully someone knows a better way. -- http://bluishcoder.co.nz -- You received this message because you are subscribed to the Google Groups "ats-lang-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to ats-lang-users+unsubscr...@googlegroups.com. To post to this group, send email to ats-lang-users@googlegroups.com. Visit this group at https://groups.google.com/group/ats-lang-users. To view this discussion on the web visit https://groups.google.com/d/msgid/ats-lang-users/CALn1vHHh9mLBS22Of-8mqJoP%2Bp4K6ExCNtDvaP3YNiK6Oo8xTg%40mail.gmail.com.
