Fixed an issue with string keys with numeric values ['3'] getting mixed with real numeric keys

README.md

@@ -127,6 +127,10 @@ See LICENSE file.
 
 ## History
 
+Jun 13 2012 v0.14
+  - Fixed an issue with string keys with numeric values `['3']` getting mixed
+    with real numeric keys (only with `sortkeys` option set to `true`).
+
 Jun 13 2012 v0.13
   - Added maxlevel option.
   - Fixed key sorting such that `true` and `'true'` are always sorted in

src/serpent.lua

@@ -1,4 +1,4 @@
-local n, v = "serpent", 0.13 -- (C) 2012 Paul Kulchenko; MIT License
+local n, v = "serpent", 0.14 -- (C) 2012 Paul Kulchenko; MIT License
 local c, d = "Paul Kulchenko", "Serializer and pretty printer of Lua data types"
 local snum = {[tostring(1/0)]='1/0 --[[math.huge]]',[tostring(-1/0)]='-1/0 --[[-math.huge]]',[tostring(0/0)]='0/0'}
 local badtype = {thread = true, userdata = true}
@@ -29,11 +29,11 @@ local function s(t, opts)
     local safe = plain and n or '['..safestr(n)..']'
     return (path or '')..(plain and path and '.' or '')..safe, safe end
   local function alphanumsort(o, n)
-    local maxn = tonumber(n) or 12
+    local maxn, torder = tonumber(n) or 12, {number = 'a', string = 'b'}
     local function padnum(d) return ("%0"..maxn.."d"):format(d) end
     table.sort(o, function(a,b)
-      return tostring(a):gsub("%d+",padnum)..type(a)
-           < tostring(b):gsub("%d+",padnum)..type(b) end) end
+      return (torder[type(a)] or 'z')..(tostring(a):gsub("%d+",padnum))
+           < (torder[type(b)] or 'z')..(tostring(b):gsub("%d+",padnum)) end) end
   local function val2str(t, name, indent, path, plainindex, level)
     local ttype, level = type(t), (level or 0)
     local spath, sname = safename(path, name)

t/test.lua

@@ -16,7 +16,7 @@ local a = {
   ['true'] = 'some value', -- keyword as a key
   z = c, -- function as value
   list={'a',nil,nil, -- embedded nils
-        [9]='i','f',[5]='g',[7]={}}, -- empty table
+        [9]='i','f',[5]='g',[7]={}, ['3'] = 33}, -- empty table
   [c] = print, -- function as key, global as value
   [io.stdin] = 3, -- global userdata as key
   ['label 2'] = b, -- shared reference
@@ -31,8 +31,10 @@ print("line: " .. serpent.line(a) .. "\n")
 local str = serpent.dump(a)
 print("full: " .. str .. "\n")
 
-local fun, err = loadstring(str)
-if err then error(err) end
+local fun, err = assert(loadstring(str))
+
+assert(loadstring(serpent.line(a, {name = '_'})), "line() method produces deserializable output: failed")
+assert(loadstring(serpent.block(a, {name = '_'})), "block() method produces deserializable output: failed")
 
 local _a = fun()
 local _b = _a['label 2'] -- shared reference