diff options
| author |  Adam Chlipala <adamc@hcoop.net> | 2009-04-09 12:31:56 -0400 |
|---|---|---|
| committer | Adam Chlipala <adamc@hcoop.net> | 2009-04-09 12:31:56 -0400 |
| commit | a75aaa90b3b827f9ef002491bc081df36260f136 (patch) | |
| tree | dddbb02bac0b5dae304255f3ba1f8f95d7af21a6 /src/elab_err.sml | |
| parent | ed34aa061c7d9ba68d8f2419b22c2a0b6b6ce812 (diff) | |
Made type class system very general; demo compiles
Diffstat (limited to 'src/elab_err.sml')
| -rw-r--r-- | src/elab_err.sml | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/src/elab_err.sml b/src/elab_err.sml index 4f24e225..172f7d37 100644 --- a/src/elab_err.sml +++ b/src/elab_err.sml @@ -217,7 +217,17 @@ fun expError env err = ("Type", p_con env c)]) co) | Unresolvable (loc, c) => (ErrorMsg.errorAt loc "Can't resolve type class instance"; - eprefaces' [("Class constraint", p_con env c)]) + eprefaces' [("Class constraint", p_con env c), + ("Class database", p_list (fn (c, rules) => + box [P.p_con env c, + PD.string ":", + space, + p_list (fn (c, e) => + box [p_exp env e, + PD.string ":", + space, + P.p_con env c]) rules]) + (E.listClasses env))]) | IllegalRec (x, e) => (ErrorMsg.errorAt (#2 e) "Illegal 'val rec' righthand side (must be a function abstraction)"; eprefaces' [("Variable", PD.string x), |