Mercurial > urweb
annotate tests/concat.ur @ 1505:8c851e5508a7
Tutorial: up to First-Class Polymorphism
| author | Adam Chlipala <adam@chlipala.net> |
|---|---|
| date | Sun, 17 Jul 2011 11:00:04 -0400 |
| parents | c7b9a33c26c8 |
| children |
| rev | line source |
|---|---|
| adam@1303 | 1 functor Make(M : sig |
| adam@1303 | 2 con ts :: {(Type * Type)} |
| adam@1303 | 3 val tab : sql_table (map fst ts) [] |
| adam@1303 | 4 val cols : $(map (fn p => p.2 -> string) ts) |
| adam@1303 | 5 end) = struct |
| adam@1303 | 6 end |
| adam@1303 | 7 |
| adam@1303 | 8 table t : {A : string} |
| adam@1303 | 9 |
| adam@1303 | 10 open Make(struct |
| adam@1303 | 11 val tab = t |
| adam@1303 | 12 val cols = {A = fn p : {B : string, C : string} => p.B ^ p.C} |
| adam@1303 | 13 end) |