Handling errors during commit

2 files changed, 12 insertions, 0 deletions

diff --git a/lib/ur/string.ur b/lib/ur/string.ur
index 4025cf68..07d7e6b8 100644
--- a/lib/ur/string.ur
+++ b/lib/ur/string.ur
@@ -38,6 +38,17 @@ fun all f s =
         al 0
     end
 
+fun mp f s =
+    let
+        fun mp' i acc =
+            if i < 0 then
+                acc
+            else
+                mp' (i - 1) (str (f (sub s i)) ^ acc)
+    in
+        mp' (length s - 1) ""
+    end
+
 fun newlines [ctx] [[Body] ~ ctx] s : xml ([Body] ++ ctx) [] [] =
     case split s #"\n" of
         None => cdata s
diff --git a/lib/ur/string.urs b/lib/ur/string.urs
index 5590b50c..557e73c0 100644
--- a/lib/ur/string.urs
+++ b/lib/ur/string.urs
@@ -20,5 +20,6 @@ val split : t -> char -> option (string * string)
 val msplit : {Haystack : t, Needle : t} -> option (string * char * string)
 
 val all : (char -> bool) -> string -> bool
+val mp : (char -> char) -> string -> string
 
 val newlines : ctx ::: {Unit} -> [[Body] ~ ctx] => string -> xml ([Body] ++ ctx) [] []