So, I'm having difficulty understanding a constraint that is failing in my code. The constraint that is failing is "f1 + f1 = 1", which I am confused by, because there appears to be no such constraint in my code. *Here's what (most of) my code is:* dataprop FBT_IN (int, a:addr) = | FBT_NIL(0, a) | {n:nat} FBT_CONS(n+1, a) of FBT_IN(n, a) typedef fb_count (a:addr, f:int, b:int) = [c:nat | f >= 0; b >= 0] (FBT_IN(c, a) | int f, int b) typedef f_ind (a:addr, f:int, i:int) = int i typedef b_ind (a:addr, b:int, i:int) = int i fn tri_fb_test {c:nat}{l:addr} ( pfin: FBT_IN(c, l) | t: ctri, dv: plane ): (FBT_IN(c+1, l) | intBtwe(0,2)) = if ctri_inside_plane(t, dv) then (FBT_CONS(pfin) | 0) else if ctri_outside_plane(t, dv) then (FBT_CONS(pfin) | 1) else (FBT_CONS(pfin) | 2) fun loop1 {i,j:nat | i <= j}{a:addr}{f1,b1:nat} ( a: !arrayptr(ctri, a, j), dv: plane, fbc: fb_count(a, f1, b1), j: int j, i: int i ): [f2,b2:nat] fb_count(a, f2, b2) = ( if i < j then let val c: ctri = a[i] val (pf_tr | tr) = tri_fb_test(fbc.0 | c, dv) val ret_fbc = ifcase | tr=0 => (FBT_CONS(fbc.0) | fbc.1+1, fbc.2) | tr=1 => (FBT_CONS(fbc.0) | fbc.1, fbc.2+1) | _ => (FBT_CONS(fbc.0) | fbc.1+1, fbc.2+1) in loop1(a, dv, ret_fbc, j, i+1) // <-- constraint fails on this line at "ret_fbc" end else fbc *And here's the error produced:* $ patscc -tcats cmesh.dats /home/tmj90/Goldelish-Engine/source/assets/cmesh.dats: 8604(line=235, offs=26) -- 8611(line=235, offs=33): error(3): unsolved constraint: C3NSTRprop(C3TKmain(); S2Eeqeq(S2Evar(f1(8784)); S2Eapp(S2Ecst(add_int_int); S2Evar(f1(8784)), S2Eintinf(1)))) typechecking has failed: there are some unsolved constraints: please inspect the above reported error message(s) for information. exit(ATS): uncaught exception: _2tmp_2ATS_2dPostiats_2src_2pats_error_2esats__FatalErrorExn(1025)
I suspect the issue is an implicitly generated constraint of some kind, but I have no idea where it's coming from. *However*, I discovered that if I comment out these lines: val ret_fbc = ifcase //| tr=0 => (FBT_CONS(fbc.0) | fbc.1+1, fbc.2) //| tr=1 => (FBT_CONS(fbc.0) | fbc.1, fbc.2+1) | _ => (FBT_CONS(fbc.0) | fbc.1+1, fbc.2+1) then everything typechecks. That's the biggest hint I could find, but I don't know what going wrong. Please let me know if you'd like me to provide more code, I just didn't want to clutter my initial post. -- 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 view this discussion on the web visit https://groups.google.com/d/msgid/ats-lang-users/dcf7d7eb-d69f-4746-800b-24c02084ee65n%40googlegroups.com.