memoire

@@ -167,6 +167,14 @@ local function histogram(list, min, max, width, func, scale)

     return s .. string.format("(%d out of range)\n", oorc)

 end

+--[[

+    returns a not-necessarily-meaningful number

+    iff `s` has mismathched curly-brackets

+]]

+local function mismatched(s)

+    return ("}" .. s):find("}[^{]+}") or (s .. "{"):find("{[^}]+{")

+end

+

 local actions = {

     a = {

         desc = "(a)dd card (from stdin)",

@@ -185,8 +193,15 @@ local actions = {

                     table.insert(nc, Prompt:new(pt, "", os.time(), 30, 0, 0, os.time(), config:get("StartingEase") or 2.5))

                     prctr = prctr + 1

                 end

+                if mismatched(pt) then

+                    io.write(string.format("Prompt %d:1 (\"%s\") contains mismatched braces\n", #deck + 1, pt))

+                end

+                if #nc >= 1 then

                     table.insert(deck, nc)

                     cardctr = cardctr + 1

+                else

+                    io.write(string.format("Prompt \"%s\" contains no answers (check braces)\n", pt))

+                end

             end

             io.write(string.format(

                 "Added %d cards (%d prompts)\n",