Don't need ref string; use PPipeline instead of ref TPipeline

lib/pure/redis.nim

@@ -20,16 +20,16 @@ const
   redisNil* = "\0\0"
 
 type 
-  TPipeline = object
+  PPipeline = ref object
     enabled: bool
-    buffer: ref string
+    buffer: string
     expected: int ## number of replies expected if pipelined
 
 type
   TRedis* {.pure, final.} = object
     socket: TSocket
     connected: bool
-    pipeline: ref TPipeline
+    pipeline: PPipeline
   
   TRedisStatus* = string
   TRedisInteger* = biggestInt
@@ -39,10 +39,9 @@ type
   EInvalidReply* = object of ESynch ## Invalid reply from redis
   ERedis* = object of ESynch        ## Error in redis
 
-proc newPipeline(): ref TPipeLine =
+proc newPipeline(): PPipeline =
   new(result)
-  result.buffer = new string
-  result.buffer[] = ""
+  result.buffer = ""
   result.enabled = false
   result.expected = 0
 
@@ -180,9 +179,9 @@ proc parseNext(r: TRedis): TRedisList =
 
 proc flushPipeline*(r: TRedis, wasMulti = false): TRedisList =
   ## Send buffered commands, clear buffer, return results
-  if r.pipeline.buffer[].len > 0:
-    r.socket.send(r.pipeline.buffer[])
-  r.pipeline.buffer[] = ""
+  if r.pipeline.buffer.len > 0:
+    r.socket.send(r.pipeline.buffer)
+  r.pipeline.buffer = ""
   
   var prevState = r.pipeline.enabled
   r.pipeline.enabled = false
@@ -201,7 +200,7 @@ proc flushPipeline*(r: TRedis, wasMulti = false): TRedisList =
   r.pipeline.expected = 0
   r.pipeline.enabled = prevState
 
-proc setPipeline*(r: TRedis, state: bool) =
+proc sePPipeline*(r: TRedis, state: bool) =
   ## Enable or disable command pipelining (reduces network roundtrips).
   ## Note that when enabled, you must call flushPipeline to actually send commands, except
   ## for multi/exec() which enable and flush the pipeline automatically.
@@ -219,7 +218,7 @@ proc sendCommand(r: TRedis, cmd: string, args: varargs[string]) =
     request.add(i & "\c\L")
   
   if r.pipeline.enabled:
-    r.pipeline.buffer[].add(request)
+    r.pipeline.buffer.add(request)
     r.pipeline.expected += 1
   else:
     r.socket.send(request)
@@ -237,7 +236,7 @@ proc sendCommand(r: TRedis, cmd: string, arg1: string,
     
   if r.pipeline.enabled:
     r.pipeline.expected += 1
-    r.pipeline.buffer[].add(request)
+    r.pipeline.buffer.add(request)
   else:
     r.socket.send(request)
 
@@ -830,9 +829,10 @@ proc exec*(r: TRedis): TRedisList =
   # between, then with the results
   return r.flushPipeline(true)
   
+
 proc multi*(r: TRedis) =
   ## Mark the start of a transaction block
-  r.setPipeline(true)
+  r.sePPipeline(true)
   r.sendCommand("MULTI")
   raiseNoOK(r.parseStatus())
 
@@ -1015,10 +1015,10 @@ when false:
   echo()
   echo("Testing with pipelining.")
   echo()
-  r.setPipeline(true)
+  r.sePPipeline(true)
   r.someTests()
   var list = r.flushPipeline()
-  r.setPipeline(false)
+  r.sePPipeline(false)
   echo("-- list length is " & $list.len & " --")
   for item in list:
     if not isNil(item):