Mercurial > urweb
comparison tests/query.ur @ 249:b6b75e6e0898
Corify transaction wrappers
author | Adam Chlipala <adamc@hcoop.net> |
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date | Sun, 31 Aug 2008 09:45:23 -0400 |
parents | 71bafe66dbe1 |
children | 326fb4686f60 |
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248:d5b12daa9b47 | 249:b6b75e6e0898 |
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7 val r1 : transaction (list {A : int, B : string, C : float}) = | 7 val r1 : transaction (list {A : int, B : string, C : float}) = |
8 query q1 | 8 query q1 |
9 (fn fs _ acc => return (Cons (fs.T1, acc))) | 9 (fn fs _ acc => return (Cons (fs.T1, acc))) |
10 Nil | 10 Nil |
11 | 11 |
12 val r2 : transaction int = | 12 val r2 : transaction string = |
13 ls <- r1; | 13 ls <- r1; |
14 return (case ls of | 14 return (case ls of |
15 Nil => 0 | 15 Nil => "Problem" |
16 | Cons ({A = a, ...}, _) => a) | 16 | Cons ({B = b, ...}, _) => b) |
17 | |
18 val main : unit -> transaction page = fn () => | |
19 s <- r2; | |
20 return <html><body> | |
21 {cdata s} | |
22 </body></html> |