From 703c91af7525838dff97f88245bf7482745e771e Mon Sep 17 00:00:00 2001
From: Adam Chlipala <adamc@hcoop.net>
Date: Sun, 28 Feb 2010 13:06:10 -0500
Subject: Changing foldRX to mapX

---
 demo/batchFun.ur  |  6 +++---
 demo/crud.ur      |  4 ++--
 demo/more/grid.ur |  8 ++++----
 lib/ur/monad.ur   | 10 ++++++++++
 lib/ur/monad.urs  |  5 +++++
 lib/ur/top.ur     | 13 ++++++++++---
 lib/ur/top.urs    | 43 ++++++++++++++++++++++++-------------------
 7 files changed, 58 insertions(+), 31 deletions(-)

diff --git a/demo/batchFun.ur b/demo/batchFun.ur
index 3f0317a8..f665b132 100644
--- a/demo/batchFun.ur
+++ b/demo/batchFun.ur
@@ -72,7 +72,7 @@ functor Make(M : sig
                   | Cons (r, ls) => <xml>
                     <tr>
                       <td>{[r.Id]}</td>
-                      {@foldRX2 [colMeta] [fst] [_]
+                      {@mapX2 [colMeta] [fst] [_]
                         (fn [nm :: Name] [p :: (Type * Type)] [rest :: {(Type * Type)}]
                                          [[nm] ~ rest] m v =>
                             <xml><td>{m.Show v}</td></xml>)
@@ -88,7 +88,7 @@ functor Make(M : sig
             <xml><dyn signal={ls <- signal lss; return <xml><table>
               <tr>
                 <th>Id</th>
-                {@foldRX [colMeta] [_]
+                {@mapX [colMeta] [_]
                   (fn [nm :: Name] [p :: (Type * Type)] [rest :: {(Type * Type)}]
                                    [[nm] ~ rest] m =>
                       <xml><th>{[m.Nam]}</th></xml>)
@@ -144,7 +144,7 @@ functor Make(M : sig
 
               <table>
                 <tr> <th>Id:</th> <td><ctextbox source={id}/></td> </tr>
-                {@foldRX2 [colMeta] [snd] [_]
+                {@mapX2 [colMeta] [snd] [_]
                   (fn [nm :: Name] [p :: (Type * Type)] [rest :: {(Type * Type)}]
                                    [[nm] ~ rest] m s =>
                       <xml><tr> <th>{[m.Nam]}:</th> <td>{m.Widget s}</td> </tr></xml>)
diff --git a/demo/crud.ur b/demo/crud.ur
index bccc3822..7850e656 100644
--- a/demo/crud.ur
+++ b/demo/crud.ur
@@ -50,7 +50,7 @@ functor Make(M : sig
                        (fn (fs : {T : $([Id = int] ++ map fst M.cols)}) => <xml>
                          <tr>
                            <td>{[fs.T.Id]}</td>
-                           {@foldRX2 [fst] [colMeta] [tr]
+                           {@mapX2 [fst] [colMeta] [tr]
                              (fn [nm :: Name] [t :: (Type * Type)] [rest :: {(Type * Type)}]
                                               [[nm] ~ rest] v col => <xml>
                                                 <td>{col.Show v}</td>
@@ -66,7 +66,7 @@ functor Make(M : sig
           <table border={1}>
             <tr>
               <th>ID</th>
-              {@foldRX [colMeta] [tr]
+              {@mapX [colMeta] [tr]
                 (fn [nm :: Name] [t :: (Type * Type)] [rest :: {(Type * Type)}]
                                  [[nm] ~ rest] col => <xml>
                                    <th>{cdata col.Nam}</th>
diff --git a/demo/more/grid.ur b/demo/more/grid.ur
index 7540ca27..d560c556 100644
--- a/demo/more/grid.ur
+++ b/demo/more/grid.ur
@@ -123,7 +123,7 @@ functor Make(M : sig
       <table class={tabl}>
         <tr class={tr}>
           <th/> <th/> <th><button value="No sort" onclick={set grid.Sort None}/></th>
-          {@foldRX2 [fst3] [colMeta M.row] [_]
+          {@mapX2 [fst3] [colMeta M.row] [_]
             (fn [nm :: Name] [p :: (Type * Type * Type)] [rest :: {(Type * Type * Type)}] [[nm] ~ rest]
                              data (meta : colMeta M.row p) =>
                 <xml><th class={th}>
@@ -208,7 +208,7 @@ functor Make(M : sig
                                 </td>
 
                                 <dyn signal={cols <- signal colsS;
-                                             return (@foldRX3 [fst3] [colMeta M.row] [snd3] [_]
+                                             return (@mapX3 [fst3] [colMeta M.row] [snd3] [_]
                                                       (fn [nm :: Name] [t :: (Type * Type * Type)]
                                                                        [rest :: {(Type * Type * Type)}]
                                                                        [[nm] ~ rest] data meta v =>
@@ -260,14 +260,14 @@ functor Make(M : sig
                                   M.aggFolder M.aggregates) grid.Rows;
                          return <xml><tr>
                            <th colspan={3}>Aggregates</th>
-                           {@foldRX2 [aggregateMeta M.row] [id] [_]
+                           {@mapX2 [aggregateMeta M.row] [id] [_]
                              (fn [nm :: Name] [t :: Type] [rest :: {Type}] [[nm] ~ rest] meta acc =>
                                  <xml><td class={agg}>{meta.Display acc}</td></xml>)
                              M.aggFolder M.aggregates rows}
                          </tr></xml>}/>
 
               <tr><th colspan={3}>Filters</th>
-                {@foldRX3 [colMeta M.row] [fst3] [thd3] [_]
+                {@mapX3 [colMeta M.row] [fst3] [thd3] [_]
                   (fn [nm :: Name] [p :: (Type * Type * Type)] [rest :: {(Type * Type * Type)}] [[nm] ~ rest]
                                    meta state filter => <xml><td>{(meta.Handlers state).DisplayFilter filter}</td></xml>)
                   M.folder M.cols grid.Cols grid.Filters}
diff --git a/lib/ur/monad.ur b/lib/ur/monad.ur
index e15da523..689e6b26 100644
--- a/lib/ur/monad.ur
+++ b/lib/ur/monad.ur
@@ -51,6 +51,16 @@ fun foldR3 [K] [m] (_ : monad m) [tf1 :: K -> Type] [tf2 :: K -> Type] [tf3 :: K
      (fn _ _ _ => return i)
      fl
 
+fun mapR0 [K] [m] (_ : monad m) [tr :: K -> Type]
+         (f : nm :: Name -> t :: K -> m (tr t)) [r ::: {K}] (fl : folder r) =
+    @Top.fold [fn r => m ($(map tr r))]
+    (fn [nm :: Name] [t :: K] [rest :: {K}] [[nm] ~ rest] (acc : m ($(map tr rest))) =>
+        v <- f [nm] [t];
+        vs <- acc;
+        return (vs ++ {nm = v}))
+    (return {})
+    fl
+
 fun mapR [K] [m] (_ : monad m) [tf :: K -> Type] [tr :: K -> Type]
          (f : nm :: Name -> t :: K -> tf t -> m (tr t)) =
     @@foldR [m] _ [tf] [fn r => $(map tr r)]
diff --git a/lib/ur/monad.urs b/lib/ur/monad.urs
index 698a4b5b..05f201e0 100644
--- a/lib/ur/monad.urs
+++ b/lib/ur/monad.urs
@@ -34,6 +34,11 @@ val foldR3 : K --> m ::: (Type -> Type) -> monad m
              -> tr []
              -> r ::: {K} -> folder r -> $(map tf1 r) -> $(map tf2 r) -> $(map tf3 r) -> m (tr r)
 
+val mapR0 : K --> m ::: (Type -> Type) -> monad m
+           -> tr :: (K -> Type)
+           -> (nm :: Name -> t :: K -> m (tr t))
+           -> r ::: {K} -> folder r -> m ($(map tr r))
+
 val mapR : K --> m ::: (Type -> Type) -> monad m
            -> tf :: (K -> Type)
            -> tr :: (K -> Type)
diff --git a/lib/ur/top.ur b/lib/ur/top.ur
index 613f5ec5..703c7bae 100644
--- a/lib/ur/top.ur
+++ b/lib/ur/top.ur
@@ -179,7 +179,14 @@ fun foldR3 [K] [tf1 :: K -> Type] [tf2 :: K -> Type] [tf3 :: K -> Type] [tr :: {
            f [nm] [t] [rest] ! r1.nm r2.nm r3.nm (acc (r1 -- nm) (r2 -- nm) (r3 -- nm)))
        (fn _ _ _ => i)
 
-fun foldRX [K] [tf :: K -> Type] [ctx :: {Unit}]
+fun mapUX [tf :: Type] [ctx :: {Unit}]
+          (f : nm :: Name -> rest :: {Unit} -> [[nm] ~ rest] => tf -> xml ctx [] []) =
+    @@foldR [fn _ => tf] [fn _ => xml ctx [] []]
+      (fn [nm :: Name] [u :: Unit] [rest :: {Unit}] [[nm] ~ rest] r acc =>
+          <xml>{f [nm] [rest] ! r}{acc}</xml>)
+      <xml/>
+
+fun mapX [K] [tf :: K -> Type] [ctx :: {Unit}]
             (f : nm :: Name -> t :: K -> rest :: {K}
                  -> [[nm] ~ rest] =>
                        tf t -> xml ctx [] []) =
@@ -188,7 +195,7 @@ fun foldRX [K] [tf :: K -> Type] [ctx :: {Unit}]
           <xml>{f [nm] [t] [rest] ! r}{acc}</xml>)
       <xml/>
 
-fun foldRX2 [K] [tf1 :: K -> Type] [tf2 :: K -> Type] [ctx :: {Unit}]
+fun mapX2 [K] [tf1 :: K -> Type] [tf2 :: K -> Type] [ctx :: {Unit}]
              (f : nm :: Name -> t :: K -> rest :: {K}
                   -> [[nm] ~ rest] =>
                         tf1 t -> tf2 t -> xml ctx [] []) =
@@ -198,7 +205,7 @@ fun foldRX2 [K] [tf1 :: K -> Type] [tf2 :: K -> Type] [ctx :: {Unit}]
           <xml>{f [nm] [t] [rest] ! r1 r2}{acc}</xml>)
       <xml/>
 
-fun foldRX3 [K] [tf1 :: K -> Type] [tf2 :: K -> Type] [tf3 :: K -> Type] [ctx :: {Unit}]
+fun mapX3 [K] [tf1 :: K -> Type] [tf2 :: K -> Type] [tf3 :: K -> Type] [ctx :: {Unit}]
              (f : nm :: Name -> t :: K -> rest :: {K}
                   -> [[nm] ~ rest] =>
                         tf1 t -> tf2 t -> tf3 t -> xml ctx [] []) =
diff --git a/lib/ur/top.urs b/lib/ur/top.urs
index 743669ce..de2ac03b 100644
--- a/lib/ur/top.urs
+++ b/lib/ur/top.urs
@@ -98,25 +98,30 @@ val foldR3 : K --> tf1 :: (K -> Type) -> tf2 :: (K -> Type) -> tf3 :: (K -> Type
              -> tr []
              -> r ::: {K} -> folder r -> $(map tf1 r) -> $(map tf2 r) -> $(map tf3 r) -> tr r
 
-val foldRX : K --> tf :: (K -> Type) -> ctx :: {Unit}
-             -> (nm :: Name -> t :: K -> rest :: {K}
-                 -> [[nm] ~ rest] =>
-                       tf t -> xml ctx [] [])
-             -> r ::: {K} -> folder r -> $(map tf r) -> xml ctx [] []
-
-val foldRX2 : K --> tf1 :: (K -> Type) -> tf2 :: (K -> Type) -> ctx :: {Unit}
-              -> (nm :: Name -> t :: K -> rest :: {K}
-                  -> [[nm] ~ rest] =>
-                        tf1 t -> tf2 t -> xml ctx [] [])
-              -> r ::: {K} -> folder r
-              -> $(map tf1 r) -> $(map tf2 r) -> xml ctx [] []
-
-val foldRX3 : K --> tf1 :: (K -> Type) -> tf2 :: (K -> Type) -> tf3 :: (K -> Type) -> ctx :: {Unit}
-              -> (nm :: Name -> t :: K -> rest :: {K}
-                  -> [[nm] ~ rest] =>
-                        tf1 t -> tf2 t -> tf3 t -> xml ctx [] [])
-              -> r ::: {K} -> folder r
-              -> $(map tf1 r) -> $(map tf2 r) -> $(map tf3 r) -> xml ctx [] []
+val mapUX : tf :: Type -> ctx :: {Unit}
+            -> (nm :: Name -> rest :: {Unit} -> [[nm] ~ rest] =>
+                tf -> xml ctx [] [])
+            -> r ::: {Unit} -> folder r -> $(mapU tf r) -> xml ctx [] []
+
+val mapX : K --> tf :: (K -> Type) -> ctx :: {Unit}
+           -> (nm :: Name -> t :: K -> rest :: {K}
+               -> [[nm] ~ rest] =>
+               tf t -> xml ctx [] [])
+           -> r ::: {K} -> folder r -> $(map tf r) -> xml ctx [] []
+
+val mapX2 : K --> tf1 :: (K -> Type) -> tf2 :: (K -> Type) -> ctx :: {Unit}
+            -> (nm :: Name -> t :: K -> rest :: {K}
+                -> [[nm] ~ rest] =>
+                tf1 t -> tf2 t -> xml ctx [] [])
+            -> r ::: {K} -> folder r
+            -> $(map tf1 r) -> $(map tf2 r) -> xml ctx [] []
+
+val mapX3 : K --> tf1 :: (K -> Type) -> tf2 :: (K -> Type) -> tf3 :: (K -> Type) -> ctx :: {Unit}
+            -> (nm :: Name -> t :: K -> rest :: {K}
+                -> [[nm] ~ rest] =>
+                tf1 t -> tf2 t -> tf3 t -> xml ctx [] [])
+            -> r ::: {K} -> folder r
+            -> $(map tf1 r) -> $(map tf2 r) -> $(map tf3 r) -> xml ctx [] []
 
 val queryL : tables ::: {{Type}} -> exps ::: {Type}
              -> [tables ~ exps] =>
-- 
cgit v1.2.3