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author | Adam Chlipala <adamc@hcoop.net> | 2009-02-24 14:04:07 -0500 |
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committer | Adam Chlipala <adamc@hcoop.net> | 2009-02-24 14:04:07 -0500 |
commit | 487f7affa283ac96326a6891c29c0800690b2c5f (patch) | |
tree | e356fff1dd9e40b0542313178974d74c1d3ff6c3 /lib/ur/top.urs | |
parent | 330dbb60d0cffe60d5257adbd82028737165bf63 (diff) |
Make folders abstract
Diffstat (limited to 'lib/ur/top.urs')
-rw-r--r-- | lib/ur/top.urs | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/lib/ur/top.urs b/lib/ur/top.urs index 29b34b10..a9e5b6b3 100644 --- a/lib/ur/top.urs +++ b/lib/ur/top.urs @@ -1,12 +1,14 @@ (** Row folding *) -con folder = K ==> fn r :: {K} => - tf :: ({K} -> Type) - -> (nm :: Name -> v :: K -> r :: {K} -> tf r - -> [[nm] ~ r] => tf ([nm = v] ++ r)) - -> tf [] -> tf r +con folder :: K --> {K} -> Type structure Folder : sig + val fold : K --> r ::: {K} -> folder r + -> tf :: ({K} -> Type) + -> (nm :: Name -> v :: K -> r :: {K} -> tf r + -> [[nm] ~ r] => tf ([nm = v] ++ r)) + -> tf [] -> tf r + val nil : K --> folder (([]) :: {K}) val cons : K --> r ::: {K} -> nm :: Name -> v :: K -> [[nm] ~ r] => folder r -> folder ([nm = v] ++ r) |