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comparison tests/stuff.lac @ 12:d89477f07c1e

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Fun with records
author Adam Chlipala <adamc@hcoop.net>
date Fri, 28 Mar 2008 17:34:57 -0400
parents e97c6d335869
children
comparison
equal deleted inserted replaced
11:e97c6d335869 12:d89477f07c1e
14 con c9 = {} 14 con c9 = {}
15 con c10 = ([]) :: {Type} 15 con c10 = ([]) :: {Type}
16 16
17 val v1 = fn t :: Type => fn x : t => x 17 val v1 = fn t :: Type => fn x : t => x
18 val v2 = v1 [t :: Type -> t -> t] v1 18 val v2 = v1 [t :: Type -> t -> t] v1
19
20 val r = {X = v1, Y = v2}
21 val v1_again = r.X
22 val v2_again = r.Y
23
24 val r2 = {X = {}, Y = v2, Z = {}}
25 val r2_X = r2.X
26 val r2_Y = r2.Y
27 val r2_Z = r2.Z
28
29 val f = fn fs :: {Type} => fn x : $([X = {}] ++ fs) => x.X
30 val f2 = fn fs :: {Type} => fn x : $(fs ++ [X = {}]) => x.X
31 val f3 = fn fs :: {Type} => fn x : $([X = {}, Y = {Z : {}}] ++ fs) => x.X
32 val f4 = fn fs :: {Type} => fn x : $([X = {}, Y = {Z : {}}] ++ fs) => x.Y
33 val f5 = fn fs1 :: {Type} => fn fs2 :: {Type} => fn x : $(fs1 ++ [X = {}] ++ fs2) => x.X
34 val f6 = fn fs1 :: {Type} => fn fs2 :: {Type} => fn x : $(fs1 ++ [X = {}] ++ fs2 ++ [Y = {Z : {}}]) => x.X
35 val f7 = fn fs1 :: {Type} => fn fs2 :: {Type} => fn x : $(fs1 ++ [X = {}] ++ fs2 ++ [Y = {Z : {}}]) => x.Y
36
37 val test = f [[Y = t :: Type -> t -> t, Z = {}]] r2
38 val test = f7 [[Y = t :: Type -> t -> t]] [[Z = {}]] r2