Mercurial > urweb
annotate tests/nest.ur @ 1817:148203744882
Tweaking treatment of function application: substitute or introduce a 'let'?
author | Adam Chlipala <adam@chlipala.net> |
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date | Sun, 05 Aug 2012 14:55:28 -0400 |
parents | 787d4931fb07 |
children |
rev | line source |
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adamc@448 | 1 fun add x = |
adamc@448 | 2 let |
adamc@448 | 3 fun add' y = x + y |
adamc@448 | 4 in |
adamc@448 | 5 add' 1 + add' 2 |
adamc@448 | 6 end |
adamc@448 | 7 |
adamc@448 | 8 fun f (x : int) = |
adamc@448 | 9 let |
adamc@448 | 10 fun page () = return <xml><body> |
adamc@448 | 11 <a link={page ()}>{[x]}</a> |
adamc@448 | 12 </body></xml> |
adamc@448 | 13 in |
adamc@448 | 14 page |
adamc@448 | 15 end |
adamc@448 | 16 |
adamc@448 | 17 fun f (x : int) = |
adamc@448 | 18 let |
adamc@448 | 19 fun page1 () = return <xml><body> |
adamc@448 | 20 <a link={page2 ()}>{[x]}</a> |
adamc@448 | 21 </body></xml> |
adamc@448 | 22 |
adamc@448 | 23 and page2 () = |
adamc@448 | 24 case Some True of |
adamc@448 | 25 Some r => return <xml><body><a link={page1 ()}>{[r]}</a></body></xml> |
adamc@448 | 26 | _ => return <xml>Error</xml> |
adamc@448 | 27 in |
adamc@450 | 28 page2 |
adamc@450 | 29 end |
adamc@450 | 30 |
adamc@450 | 31 fun f (x : int) = |
adamc@450 | 32 let |
adamc@450 | 33 fun page1 () = return <xml><body> |
adamc@450 | 34 <a link={page2 ()}>{[x]}</a> |
adamc@450 | 35 </body></xml> |
adamc@450 | 36 |
adamc@450 | 37 and page2 () = |
adamc@450 | 38 case Some True of |
adamc@450 | 39 Some r => return <xml><body><a link={page1 ()}>{[r]}</a></body></xml> |
adamc@450 | 40 | _ => return <xml><body><a link={page3 ()}>!!</a></body></xml> |
adamc@450 | 41 |
adamc@450 | 42 and page3 () = return <xml><body><a link={page2 ()}>!</a><a link={page1 ()}>!</a> |
adamc@450 | 43 <a link={page3 ()}>!</a></body></xml> |
adamc@450 | 44 in |
adamc@450 | 45 page3 |
adamc@448 | 46 end |
adamc@448 | 47 |
adamc@453 | 48 fun add2 (x : int) (y : int) = |
adamc@453 | 49 let |
adamc@453 | 50 fun add3 () = x + y |
adamc@453 | 51 in |
adamc@453 | 52 add3 |
adamc@453 | 53 end |
adamc@453 | 54 |
adamc@453 | 55 fun add3 (x : int) = |
adamc@453 | 56 let |
adamc@453 | 57 fun add2 (y : int) = |
adamc@453 | 58 let |
adamc@453 | 59 fun add1 (z : int) = x + y + z |
adamc@453 | 60 in |
adamc@453 | 61 add1 |
adamc@453 | 62 end |
adamc@453 | 63 in |
adamc@453 | 64 add2 |
adamc@453 | 65 end |
adamc@453 | 66 |
adamc@453 | 67 (*datatype list t = Nil | Cons of t * list t |
adamc@448 | 68 |
adamc@448 | 69 fun length (t ::: Type) (ls : list t) = |
adamc@448 | 70 let |
adamc@448 | 71 fun length' ls acc = |
adamc@448 | 72 case ls of |
adamc@448 | 73 Nil => acc |
adamc@448 | 74 | Cons (_, ls') => length' ls' (acc + 1) |
adamc@448 | 75 in |
adamc@448 | 76 length' ls 0 |
adamc@448 | 77 end |
adamc@450 | 78 |
adamc@453 | 79 *) |